./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.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-nonblocking-cntr-alt.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 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:50:00,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:50:00,162 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:50:00,165 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:50:00,166 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:50:00,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:50:00,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:50:00,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:50:00,181 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:50:00,182 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:50:00,182 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:50:00,183 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:50:00,184 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:50:00,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:50:00,185 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:50:00,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:50:00,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:50:00,189 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:50:00,189 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:50:00,189 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:50:00,190 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:50:00,190 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:50:00,190 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:50:00,191 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:50:00,191 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:50:00,192 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:50:00,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:50:00,192 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:50:00,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:50:00,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:50:00,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:50:00,194 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:50:00,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:50:00,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:50:00,195 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:50:00,195 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:50:00,195 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:50:00,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:50:00,196 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:50:00,196 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:50:00,196 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:50:00,196 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:50:00,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:50:00,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2024-01-27 15:50:00,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:50:00,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:50:00,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:50:00,449 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:50:00,449 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:50:00,450 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-01-27 15:50:01,472 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:50:01,633 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:50:01,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-01-27 15:50:01,639 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39dd004b8/b6a12dcdcdf64b76943e9a61fac56f7d/FLAG238a0abbe [2024-01-27 15:50:01,656 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39dd004b8/b6a12dcdcdf64b76943e9a61fac56f7d [2024-01-27 15:50:01,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:50:01,661 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:50:01,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:50:01,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:50:01,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:50:01,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b17db83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01, skipping insertion in model container [2024-01-27 15:50:01,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,691 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:50:01,870 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-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-01-27 15:50:01,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:50:01,881 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:50:01,895 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-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-01-27 15:50:01,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:50:01,906 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:50:01,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01 WrapperNode [2024-01-27 15:50:01,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:50:01,908 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:50:01,908 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:50:01,908 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:50:01,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,919 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,937 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2024-01-27 15:50:01,937 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:50:01,938 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:50:01,938 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:50:01,938 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:50:01,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,952 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,962 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 15:50:01,964 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,964 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,967 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,972 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,974 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,975 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,976 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:50:01,977 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:50:01,977 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:50:01,977 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:50:01,978 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (1/1) ... [2024-01-27 15:50:01,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:50:01,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:02,030 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 15:50:02,036 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 15:50:02,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:50:02,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:50:02,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:50:02,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:50:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:50:02,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:50:02,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:50:02,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:50:02,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:50:02,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:50:02,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:50:02,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:50:02,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:50:02,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:50:02,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:50:02,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:50:02,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:50:02,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:50:02,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:50:02,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:50:02,077 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 15:50:02,175 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:50:02,177 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:50:02,314 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:50:02,314 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:50:02,434 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:50:02,434 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:50:02,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:50:02 BoogieIcfgContainer [2024-01-27 15:50:02,435 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:50:02,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:50:02,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:50:02,439 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:50:02,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:50:01" (1/3) ... [2024-01-27 15:50:02,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244681df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:50:02, skipping insertion in model container [2024-01-27 15:50:02,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:01" (2/3) ... [2024-01-27 15:50:02,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244681df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:50:02, skipping insertion in model container [2024-01-27 15:50:02,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:50:02" (3/3) ... [2024-01-27 15:50:02,441 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2024-01-27 15:50:02,447 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:50:02,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:50:02,453 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:50:02,454 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:50:02,496 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:50:02,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-01-27 15:50:02,544 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-01-27 15:50:02,544 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:50:02,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-01-27 15:50:02,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-01-27 15:50:02,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-01-27 15:50:02,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:50:02,560 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;@79a71314, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:50:02,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:50:02,567 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:50:02,567 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-01-27 15:50:02,567 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:50:02,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:02,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:02,568 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 15:50:02,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2041025963, now seen corresponding path program 1 times [2024-01-27 15:50:02,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:02,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813716089] [2024-01-27 15:50:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:02,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:02,902 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 15:50:02,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813716089] [2024-01-27 15:50:02,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813716089] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:50:02,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:50:02,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:50:02,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303592284] [2024-01-27 15:50:02,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:50:02,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:50:02,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:50:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:50:03,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-01-27 15:50:03,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:03,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:03,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-01-27 15:50:03,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:03,101 INFO L124 PetriNetUnfolderBase]: 65/136 cut-off events. [2024-01-27 15:50:03,102 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-27 15:50:03,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 136 events. 65/136 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 412 event pairs, 33 based on Foata normal form. 10/145 useless extension candidates. Maximal degree in co-relation 217. Up to 92 conditions per place. [2024-01-27 15:50:03,106 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-01-27 15:50:03,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 117 flow [2024-01-27 15:50:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:50:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:50:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-01-27 15:50:03,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-01-27 15:50:03,117 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 4 states and 45 transitions. [2024-01-27 15:50:03,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 117 flow [2024-01-27 15:50:03,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 27 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:50:03,120 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2024-01-27 15:50:03,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2024-01-27 15:50:03,124 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 0 predicate places. [2024-01-27 15:50:03,124 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2024-01-27 15:50:03,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:03,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:03,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:03,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:50:03,125 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 15:50:03,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1493584575, now seen corresponding path program 1 times [2024-01-27 15:50:03,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:03,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876900351] [2024-01-27 15:50:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:03,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:03,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:03,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876900351] [2024-01-27 15:50:03,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876900351] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:50:03,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:50:03,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:50:03,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064121340] [2024-01-27 15:50:03,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:50:03,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:50:03,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:03,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:50:03,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:50:03,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-01-27 15:50:03,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 15:50:03,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:03,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-01-27 15:50:03,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:03,268 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2024-01-27 15:50:03,268 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-01-27 15:50:03,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 181 events. 93/181 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 597 event pairs, 39 based on Foata normal form. 10/186 useless extension candidates. Maximal degree in co-relation 113. Up to 116 conditions per place. [2024-01-27 15:50:03,270 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-01-27 15:50:03,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 137 flow [2024-01-27 15:50:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:50:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:50:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-01-27 15:50:03,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-01-27 15:50:03,271 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 4 states and 45 transitions. [2024-01-27 15:50:03,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 137 flow [2024-01-27 15:50:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:50:03,272 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 66 flow [2024-01-27 15:50:03,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2024-01-27 15:50:03,273 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2024-01-27 15:50:03,273 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 66 flow [2024-01-27 15:50:03,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 15:50:03,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:03,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:03,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:50:03,274 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 15:50:03,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash -671721043, now seen corresponding path program 1 times [2024-01-27 15:50:03,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:03,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222716021] [2024-01-27 15:50:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:03,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:03,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:03,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222716021] [2024-01-27 15:50:03,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222716021] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:03,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546831565] [2024-01-27 15:50:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:03,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:03,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:03,629 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 15:50:03,641 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 15:50:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:03,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:50:03,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:03,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:04,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546831565] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:04,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:04,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:50:04,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770613722] [2024-01-27 15:50:04,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:04,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:04,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:04,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:04,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 66 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 15:50:04,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:04,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:04,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:05,091 INFO L124 PetriNetUnfolderBase]: 406/703 cut-off events. [2024-01-27 15:50:05,091 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2024-01-27 15:50:05,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 703 events. 406/703 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2838 event pairs, 26 based on Foata normal form. 14/717 useless extension candidates. Maximal degree in co-relation 595. Up to 232 conditions per place. [2024-01-27 15:50:05,096 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 78 selfloop transitions, 53 changer transitions 18/150 dead transitions. [2024-01-27 15:50:05,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 150 transitions, 736 flow [2024-01-27 15:50:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:50:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:50:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 222 transitions. [2024-01-27 15:50:05,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881118881118881 [2024-01-27 15:50:05,099 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 66 flow. Second operand 26 states and 222 transitions. [2024-01-27 15:50:05,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 150 transitions, 736 flow [2024-01-27 15:50:05,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 150 transitions, 724 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:50:05,102 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 506 flow [2024-01-27 15:50:05,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=506, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2024-01-27 15:50:05,103 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 42 predicate places. [2024-01-27 15:50:05,103 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 506 flow [2024-01-27 15:50:05,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 15:50:05,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:05,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:05,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:50:05,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:05,317 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 15:50:05,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash 192009637, now seen corresponding path program 2 times [2024-01-27 15:50:05,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:05,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312703666] [2024-01-27 15:50:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:05,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:05,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312703666] [2024-01-27 15:50:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312703666] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266456823] [2024-01-27 15:50:05,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:50:05,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:05,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:05,538 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 15:50:05,556 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 15:50:05,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:05,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:05,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:50:05,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:05,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:06,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266456823] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:06,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:06,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:50:06,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406049432] [2024-01-27 15:50:06,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:06,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:06,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:06,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:06,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 506 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 15:50:06,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:06,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:06,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:06,762 INFO L124 PetriNetUnfolderBase]: 611/1090 cut-off events. [2024-01-27 15:50:06,763 INFO L125 PetriNetUnfolderBase]: For 2784/2784 co-relation queries the response was YES. [2024-01-27 15:50:06,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4494 conditions, 1090 events. 611/1090 cut-off events. For 2784/2784 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5162 event pairs, 41 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 4448. Up to 313 conditions per place. [2024-01-27 15:50:06,769 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 111 selfloop transitions, 107 changer transitions 34/253 dead transitions. [2024-01-27 15:50:06,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 253 transitions, 2010 flow [2024-01-27 15:50:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:50:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:50:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 240 transitions. [2024-01-27 15:50:06,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-01-27 15:50:06,771 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 506 flow. Second operand 24 states and 240 transitions. [2024-01-27 15:50:06,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 253 transitions, 2010 flow [2024-01-27 15:50:06,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 253 transitions, 1988 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-01-27 15:50:06,785 INFO L231 Difference]: Finished difference. Result has 103 places, 146 transitions, 1433 flow [2024-01-27 15:50:06,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1433, PETRI_PLACES=103, PETRI_TRANSITIONS=146} [2024-01-27 15:50:06,786 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 79 predicate places. [2024-01-27 15:50:06,786 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 146 transitions, 1433 flow [2024-01-27 15:50:06,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 15:50:06,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:06,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:06,809 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 15:50:06,997 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,SelfDestructingSolverStorable3 [2024-01-27 15:50:06,998 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 15:50:06,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:06,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1243778285, now seen corresponding path program 3 times [2024-01-27 15:50:06,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:06,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239475441] [2024-01-27 15:50:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:06,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:07,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:07,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239475441] [2024-01-27 15:50:07,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239475441] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:07,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128250556] [2024-01-27 15:50:07,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:07,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:07,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:07,256 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 15:50:07,258 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 15:50:07,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:50:07,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:07,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:50:07,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:07,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:07,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128250556] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:07,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:07,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:50:07,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976081292] [2024-01-27 15:50:07,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:07,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:07,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:07,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:07,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:07,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:07,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 146 transitions, 1433 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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 15:50:07,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:07,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:07,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:08,707 INFO L124 PetriNetUnfolderBase]: 637/1146 cut-off events. [2024-01-27 15:50:08,707 INFO L125 PetriNetUnfolderBase]: For 6159/6159 co-relation queries the response was YES. [2024-01-27 15:50:08,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6155 conditions, 1146 events. 637/1146 cut-off events. For 6159/6159 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5596 event pairs, 31 based on Foata normal form. 2/1148 useless extension candidates. Maximal degree in co-relation 6082. Up to 325 conditions per place. [2024-01-27 15:50:08,717 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 112 selfloop transitions, 139 changer transitions 25/277 dead transitions. [2024-01-27 15:50:08,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 277 transitions, 2923 flow [2024-01-27 15:50:08,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:50:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:50:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 265 transitions. [2024-01-27 15:50:08,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301948051948052 [2024-01-27 15:50:08,720 INFO L175 Difference]: Start difference. First operand has 103 places, 146 transitions, 1433 flow. Second operand 28 states and 265 transitions. [2024-01-27 15:50:08,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 277 transitions, 2923 flow [2024-01-27 15:50:08,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 277 transitions, 2816 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-01-27 15:50:08,756 INFO L231 Difference]: Finished difference. Result has 135 places, 178 transitions, 2186 flow [2024-01-27 15:50:08,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2186, PETRI_PLACES=135, PETRI_TRANSITIONS=178} [2024-01-27 15:50:08,758 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 111 predicate places. [2024-01-27 15:50:08,758 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 178 transitions, 2186 flow [2024-01-27 15:50:08,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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 15:50:08,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:08,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:08,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 15:50:08,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:08,973 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 15:50:08,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash 83752113, now seen corresponding path program 4 times [2024-01-27 15:50:08,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:08,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853030182] [2024-01-27 15:50:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:08,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:09,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:09,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853030182] [2024-01-27 15:50:09,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853030182] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:09,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287767787] [2024-01-27 15:50:09,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:50:09,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:09,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:09,169 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 15:50:09,208 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 15:50:09,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:50:09,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:09,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:50:09,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:09,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:09,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287767787] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:09,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:09,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-01-27 15:50:09,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544101516] [2024-01-27 15:50:09,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:09,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:09,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:09,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:09,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:09,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 178 transitions, 2186 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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 15:50:09,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:09,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:09,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:10,974 INFO L124 PetriNetUnfolderBase]: 1045/1886 cut-off events. [2024-01-27 15:50:10,974 INFO L125 PetriNetUnfolderBase]: For 15578/15578 co-relation queries the response was YES. [2024-01-27 15:50:10,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11725 conditions, 1886 events. 1045/1886 cut-off events. For 15578/15578 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10272 event pairs, 38 based on Foata normal form. 4/1890 useless extension candidates. Maximal degree in co-relation 11608. Up to 553 conditions per place. [2024-01-27 15:50:10,989 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 195 selfloop transitions, 250 changer transitions 22/468 dead transitions. [2024-01-27 15:50:10,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 468 transitions, 6064 flow [2024-01-27 15:50:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-27 15:50:10,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-27 15:50:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 372 transitions. [2024-01-27 15:50:10,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43356643356643354 [2024-01-27 15:50:10,992 INFO L175 Difference]: Start difference. First operand has 135 places, 178 transitions, 2186 flow. Second operand 39 states and 372 transitions. [2024-01-27 15:50:10,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 468 transitions, 6064 flow [2024-01-27 15:50:11,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 468 transitions, 5584 flow, removed 105 selfloop flow, removed 15 redundant places. [2024-01-27 15:50:11,059 INFO L231 Difference]: Finished difference. Result has 173 places, 325 transitions, 4616 flow [2024-01-27 15:50:11,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4616, PETRI_PLACES=173, PETRI_TRANSITIONS=325} [2024-01-27 15:50:11,062 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 149 predicate places. [2024-01-27 15:50:11,062 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 325 transitions, 4616 flow [2024-01-27 15:50:11,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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 15:50:11,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:11,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:11,088 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 15:50:11,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:11,275 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 15:50:11,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:11,275 INFO L85 PathProgramCache]: Analyzing trace with hash 536205237, now seen corresponding path program 5 times [2024-01-27 15:50:11,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:11,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829920630] [2024-01-27 15:50:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:11,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:11,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:11,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829920630] [2024-01-27 15:50:11,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829920630] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:11,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013243479] [2024-01-27 15:50:11,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:50:11,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:11,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:11,481 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 15:50:11,509 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 15:50:11,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:11,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:11,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:50:11,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:11,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:11,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013243479] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:11,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:11,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-01-27 15:50:11,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012653912] [2024-01-27 15:50:11,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:11,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:11,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:11,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:11,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 325 transitions, 4616 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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 15:50:11,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:11,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:11,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:13,092 INFO L124 PetriNetUnfolderBase]: 1175/2091 cut-off events. [2024-01-27 15:50:13,093 INFO L125 PetriNetUnfolderBase]: For 22526/22526 co-relation queries the response was YES. [2024-01-27 15:50:13,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14619 conditions, 2091 events. 1175/2091 cut-off events. For 22526/22526 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11497 event pairs, 59 based on Foata normal form. 2/2093 useless extension candidates. Maximal degree in co-relation 14466. Up to 831 conditions per place. [2024-01-27 15:50:13,113 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 207 selfloop transitions, 256 changer transitions 29/493 dead transitions. [2024-01-27 15:50:13,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 493 transitions, 7452 flow [2024-01-27 15:50:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:50:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:50:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 313 transitions. [2024-01-27 15:50:13,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064935064935065 [2024-01-27 15:50:13,115 INFO L175 Difference]: Start difference. First operand has 173 places, 325 transitions, 4616 flow. Second operand 35 states and 313 transitions. [2024-01-27 15:50:13,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 493 transitions, 7452 flow [2024-01-27 15:50:13,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 493 transitions, 6463 flow, removed 393 selfloop flow, removed 14 redundant places. [2024-01-27 15:50:13,325 INFO L231 Difference]: Finished difference. Result has 204 places, 377 transitions, 5576 flow [2024-01-27 15:50:13,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5576, PETRI_PLACES=204, PETRI_TRANSITIONS=377} [2024-01-27 15:50:13,326 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 180 predicate places. [2024-01-27 15:50:13,326 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 377 transitions, 5576 flow [2024-01-27 15:50:13,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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 15:50:13,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:13,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:13,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:13,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:13,538 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 15:50:13,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:13,539 INFO L85 PathProgramCache]: Analyzing trace with hash -571579629, now seen corresponding path program 6 times [2024-01-27 15:50:13,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:13,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787349522] [2024-01-27 15:50:13,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:13,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:13,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:13,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787349522] [2024-01-27 15:50:13,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787349522] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:13,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150120392] [2024-01-27 15:50:13,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:50:13,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:13,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:13,714 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 15:50:13,715 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 15:50:13,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:50:13,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:13,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:50:13,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:13,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:14,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150120392] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:14,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:14,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:50:14,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116877271] [2024-01-27 15:50:14,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:14,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:14,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:14,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:14,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:14,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:14,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 377 transitions, 5576 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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 15:50:14,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:14,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:14,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:15,190 INFO L124 PetriNetUnfolderBase]: 1299/2336 cut-off events. [2024-01-27 15:50:15,191 INFO L125 PetriNetUnfolderBase]: For 23118/23118 co-relation queries the response was YES. [2024-01-27 15:50:15,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 2336 events. 1299/2336 cut-off events. For 23118/23118 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13381 event pairs, 56 based on Foata normal form. 14/2350 useless extension candidates. Maximal degree in co-relation 16124. Up to 1046 conditions per place. [2024-01-27 15:50:15,209 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 224 selfloop transitions, 276 changer transitions 35/536 dead transitions. [2024-01-27 15:50:15,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 536 transitions, 8472 flow [2024-01-27 15:50:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:50:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:50:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 214 transitions. [2024-01-27 15:50:15,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42292490118577075 [2024-01-27 15:50:15,211 INFO L175 Difference]: Start difference. First operand has 204 places, 377 transitions, 5576 flow. Second operand 23 states and 214 transitions. [2024-01-27 15:50:15,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 536 transitions, 8472 flow [2024-01-27 15:50:15,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 536 transitions, 8266 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-01-27 15:50:15,349 INFO L231 Difference]: Finished difference. Result has 222 places, 443 transitions, 7611 flow [2024-01-27 15:50:15,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5393, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7611, PETRI_PLACES=222, PETRI_TRANSITIONS=443} [2024-01-27 15:50:15,351 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 198 predicate places. [2024-01-27 15:50:15,351 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 443 transitions, 7611 flow [2024-01-27 15:50:15,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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 15:50:15,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:15,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:15,363 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 15:50:15,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:15,563 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 15:50:15,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:15,564 INFO L85 PathProgramCache]: Analyzing trace with hash 755950769, now seen corresponding path program 7 times [2024-01-27 15:50:15,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:15,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957281674] [2024-01-27 15:50:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:15,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:15,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:15,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957281674] [2024-01-27 15:50:15,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957281674] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:15,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563983400] [2024-01-27 15:50:15,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:50:15,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:15,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:15,750 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 15:50:15,774 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 15:50:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:15,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:50:15,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:15,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:16,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563983400] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:16,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:16,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:50:16,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652092453] [2024-01-27 15:50:16,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:16,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:16,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:16,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:16,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 443 transitions, 7611 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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 15:50:16,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:16,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:16,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:17,283 INFO L124 PetriNetUnfolderBase]: 1352/2413 cut-off events. [2024-01-27 15:50:17,283 INFO L125 PetriNetUnfolderBase]: For 31477/31477 co-relation queries the response was YES. [2024-01-27 15:50:17,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18748 conditions, 2413 events. 1352/2413 cut-off events. For 31477/31477 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13720 event pairs, 42 based on Foata normal form. 2/2415 useless extension candidates. Maximal degree in co-relation 18577. Up to 1112 conditions per place. [2024-01-27 15:50:17,307 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 235 selfloop transitions, 335 changer transitions 24/595 dead transitions. [2024-01-27 15:50:17,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 595 transitions, 10754 flow [2024-01-27 15:50:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:50:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:50:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 229 transitions. [2024-01-27 15:50:17,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38552188552188554 [2024-01-27 15:50:17,310 INFO L175 Difference]: Start difference. First operand has 222 places, 443 transitions, 7611 flow. Second operand 27 states and 229 transitions. [2024-01-27 15:50:17,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 595 transitions, 10754 flow [2024-01-27 15:50:17,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 595 transitions, 10530 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-01-27 15:50:17,592 INFO L231 Difference]: Finished difference. Result has 249 places, 517 transitions, 10033 flow [2024-01-27 15:50:17,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7448, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10033, PETRI_PLACES=249, PETRI_TRANSITIONS=517} [2024-01-27 15:50:17,593 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 225 predicate places. [2024-01-27 15:50:17,593 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 517 transitions, 10033 flow [2024-01-27 15:50:17,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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 15:50:17,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:17,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:17,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:17,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:17,805 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 15:50:17,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash 134879665, now seen corresponding path program 8 times [2024-01-27 15:50:17,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:17,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011460250] [2024-01-27 15:50:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:17,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:18,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:18,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011460250] [2024-01-27 15:50:18,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011460250] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:18,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054074933] [2024-01-27 15:50:18,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:50:18,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:18,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:18,017 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 15:50:18,019 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 15:50:18,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:18,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:18,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:50:18,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:18,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:18,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054074933] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:18,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:18,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:50:18,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422203291] [2024-01-27 15:50:18,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:18,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:18,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:18,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:18,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:18,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:18,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 517 transitions, 10033 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 15:50:18,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:18,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:18,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:19,603 INFO L124 PetriNetUnfolderBase]: 1333/2360 cut-off events. [2024-01-27 15:50:19,603 INFO L125 PetriNetUnfolderBase]: For 36947/36947 co-relation queries the response was YES. [2024-01-27 15:50:19,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20457 conditions, 2360 events. 1333/2360 cut-off events. For 36947/36947 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13117 event pairs, 42 based on Foata normal form. 7/2367 useless extension candidates. Maximal degree in co-relation 20307. Up to 1064 conditions per place. [2024-01-27 15:50:19,628 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 263 selfloop transitions, 313 changer transitions 31/608 dead transitions. [2024-01-27 15:50:19,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 608 transitions, 12327 flow [2024-01-27 15:50:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:50:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:50:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 200 transitions. [2024-01-27 15:50:19,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-01-27 15:50:19,630 INFO L175 Difference]: Start difference. First operand has 249 places, 517 transitions, 10033 flow. Second operand 21 states and 200 transitions. [2024-01-27 15:50:19,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 608 transitions, 12327 flow [2024-01-27 15:50:19,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 608 transitions, 12079 flow, removed 102 selfloop flow, removed 9 redundant places. [2024-01-27 15:50:19,993 INFO L231 Difference]: Finished difference. Result has 266 places, 530 transitions, 11433 flow [2024-01-27 15:50:19,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9788, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11433, PETRI_PLACES=266, PETRI_TRANSITIONS=530} [2024-01-27 15:50:19,994 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 242 predicate places. [2024-01-27 15:50:19,994 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 530 transitions, 11433 flow [2024-01-27 15:50:19,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 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 15:50:19,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:19,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:20,005 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 15:50:20,205 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,SelfDestructingSolverStorable9 [2024-01-27 15:50:20,206 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 15:50:20,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:20,206 INFO L85 PathProgramCache]: Analyzing trace with hash 805518513, now seen corresponding path program 9 times [2024-01-27 15:50:20,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:20,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458494398] [2024-01-27 15:50:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:20,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:20,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458494398] [2024-01-27 15:50:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458494398] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646736369] [2024-01-27 15:50:20,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:20,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:20,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:20,364 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 15:50:20,389 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 15:50:20,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:50:20,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:20,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:50:20,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:20,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:20,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646736369] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:20,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:20,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:50:20,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567213624] [2024-01-27 15:50:20,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:20,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:20,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:20,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:20,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:20,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 530 transitions, 11433 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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 15:50:20,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:20,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:20,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:22,198 INFO L124 PetriNetUnfolderBase]: 1348/2391 cut-off events. [2024-01-27 15:50:22,198 INFO L125 PetriNetUnfolderBase]: For 44280/44280 co-relation queries the response was YES. [2024-01-27 15:50:22,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22358 conditions, 2391 events. 1348/2391 cut-off events. For 44280/44280 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13324 event pairs, 38 based on Foata normal form. 2/2393 useless extension candidates. Maximal degree in co-relation 22182. Up to 1088 conditions per place. [2024-01-27 15:50:22,272 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 265 selfloop transitions, 378 changer transitions 22/666 dead transitions. [2024-01-27 15:50:22,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 666 transitions, 14537 flow [2024-01-27 15:50:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-27 15:50:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-27 15:50:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 279 transitions. [2024-01-27 15:50:22,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384297520661157 [2024-01-27 15:50:22,274 INFO L175 Difference]: Start difference. First operand has 266 places, 530 transitions, 11433 flow. Second operand 33 states and 279 transitions. [2024-01-27 15:50:22,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 666 transitions, 14537 flow [2024-01-27 15:50:22,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 666 transitions, 14356 flow, removed 41 selfloop flow, removed 13 redundant places. [2024-01-27 15:50:22,642 INFO L231 Difference]: Finished difference. Result has 293 places, 586 transitions, 13923 flow [2024-01-27 15:50:22,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11296, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=13923, PETRI_PLACES=293, PETRI_TRANSITIONS=586} [2024-01-27 15:50:22,644 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 269 predicate places. [2024-01-27 15:50:22,644 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 586 transitions, 13923 flow [2024-01-27 15:50:22,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 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 15:50:22,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:22,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:22,655 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 15:50:22,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:22,856 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 15:50:22,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2055281171, now seen corresponding path program 10 times [2024-01-27 15:50:22,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:22,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141821005] [2024-01-27 15:50:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:22,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:23,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:23,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141821005] [2024-01-27 15:50:23,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141821005] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:23,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945864872] [2024-01-27 15:50:23,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:50:23,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:23,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:23,048 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 15:50:23,072 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 15:50:23,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:50:23,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:23,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:50:23,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:23,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:23,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945864872] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:23,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:23,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2024-01-27 15:50:23,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884705510] [2024-01-27 15:50:23,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:23,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:50:23,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:50:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:50:23,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:23,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 586 transitions, 13923 flow. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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 15:50:23,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:23,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:23,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:24,599 INFO L124 PetriNetUnfolderBase]: 1361/2410 cut-off events. [2024-01-27 15:50:24,599 INFO L125 PetriNetUnfolderBase]: For 52402/52402 co-relation queries the response was YES. [2024-01-27 15:50:24,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24563 conditions, 2410 events. 1361/2410 cut-off events. For 52402/52402 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13363 event pairs, 23 based on Foata normal form. 1/2411 useless extension candidates. Maximal degree in co-relation 24369. Up to 1124 conditions per place. [2024-01-27 15:50:24,625 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 213 selfloop transitions, 443 changer transitions 6/663 dead transitions. [2024-01-27 15:50:24,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 663 transitions, 16281 flow [2024-01-27 15:50:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:50:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:50:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 189 transitions. [2024-01-27 15:50:24,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37351778656126483 [2024-01-27 15:50:24,634 INFO L175 Difference]: Start difference. First operand has 293 places, 586 transitions, 13923 flow. Second operand 23 states and 189 transitions. [2024-01-27 15:50:24,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 663 transitions, 16281 flow [2024-01-27 15:50:25,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 663 transitions, 15889 flow, removed 83 selfloop flow, removed 14 redundant places. [2024-01-27 15:50:25,034 INFO L231 Difference]: Finished difference. Result has 299 places, 605 transitions, 15121 flow [2024-01-27 15:50:25,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=13543, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15121, PETRI_PLACES=299, PETRI_TRANSITIONS=605} [2024-01-27 15:50:25,035 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 275 predicate places. [2024-01-27 15:50:25,035 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 605 transitions, 15121 flow [2024-01-27 15:50:25,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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 15:50:25,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:25,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:25,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-01-27 15:50:25,246 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,SelfDestructingSolverStorable11 [2024-01-27 15:50:25,247 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 15:50:25,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash 198407273, now seen corresponding path program 11 times [2024-01-27 15:50:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:25,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618610474] [2024-01-27 15:50:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:25,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618610474] [2024-01-27 15:50:25,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618610474] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662067614] [2024-01-27 15:50:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:50:25,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:25,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:25,435 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 15:50:25,461 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 15:50:25,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:50:25,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:25,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:50:25,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:25,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:26,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662067614] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:26,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:26,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:50:26,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889912120] [2024-01-27 15:50:26,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:26,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:50:26,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:26,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:50:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:50:26,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:26,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 605 transitions, 15121 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:50:26,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:26,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:26,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:29,035 INFO L124 PetriNetUnfolderBase]: 1917/3487 cut-off events. [2024-01-27 15:50:29,036 INFO L125 PetriNetUnfolderBase]: For 87627/87627 co-relation queries the response was YES. [2024-01-27 15:50:29,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37317 conditions, 3487 events. 1917/3487 cut-off events. For 87627/87627 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 21096 event pairs, 70 based on Foata normal form. 5/3492 useless extension candidates. Maximal degree in co-relation 37087. Up to 1109 conditions per place. [2024-01-27 15:50:29,069 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 426 selfloop transitions, 557 changer transitions 36/1020 dead transitions. [2024-01-27 15:50:29,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1020 transitions, 24736 flow [2024-01-27 15:50:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-01-27 15:50:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-01-27 15:50:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 579 transitions. [2024-01-27 15:50:29,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-01-27 15:50:29,071 INFO L175 Difference]: Start difference. First operand has 299 places, 605 transitions, 15121 flow. Second operand 63 states and 579 transitions. [2024-01-27 15:50:29,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1020 transitions, 24736 flow [2024-01-27 15:50:29,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1020 transitions, 24516 flow, removed 49 selfloop flow, removed 17 redundant places. [2024-01-27 15:50:29,705 INFO L231 Difference]: Finished difference. Result has 364 places, 781 transitions, 21986 flow [2024-01-27 15:50:29,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14921, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=21986, PETRI_PLACES=364, PETRI_TRANSITIONS=781} [2024-01-27 15:50:29,706 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 340 predicate places. [2024-01-27 15:50:29,706 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 781 transitions, 21986 flow [2024-01-27 15:50:29,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:50:29,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:29,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:29,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-27 15:50:29,912 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,SelfDestructingSolverStorable12 [2024-01-27 15:50:29,913 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 15:50:29,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1581178181, now seen corresponding path program 12 times [2024-01-27 15:50:29,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:29,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102137750] [2024-01-27 15:50:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:29,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:30,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:30,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102137750] [2024-01-27 15:50:30,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102137750] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:30,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50934358] [2024-01-27 15:50:30,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:50:30,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:30,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:30,097 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 15:50:30,109 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 15:50:30,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:50:30,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:30,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:50:30,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:30,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:30,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50934358] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:30,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:30,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:50:30,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854282336] [2024-01-27 15:50:30,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:30,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:50:30,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:50:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:50:30,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:30,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 781 transitions, 21986 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:50:30,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:30,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:30,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:35,936 INFO L124 PetriNetUnfolderBase]: 2449/4469 cut-off events. [2024-01-27 15:50:35,936 INFO L125 PetriNetUnfolderBase]: For 148498/148498 co-relation queries the response was YES. [2024-01-27 15:50:35,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53226 conditions, 4469 events. 2449/4469 cut-off events. For 148498/148498 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 28858 event pairs, 53 based on Foata normal form. 6/4475 useless extension candidates. Maximal degree in co-relation 53112. Up to 1391 conditions per place. [2024-01-27 15:50:36,111 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 443 selfloop transitions, 841 changer transitions 36/1321 dead transitions. [2024-01-27 15:50:36,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1321 transitions, 35642 flow [2024-01-27 15:50:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-01-27 15:50:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-01-27 15:50:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 929 transitions. [2024-01-27 15:50:36,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37369267900241354 [2024-01-27 15:50:36,117 INFO L175 Difference]: Start difference. First operand has 364 places, 781 transitions, 21986 flow. Second operand 113 states and 929 transitions. [2024-01-27 15:50:36,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1321 transitions, 35642 flow [2024-01-27 15:50:37,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1321 transitions, 34946 flow, removed 238 selfloop flow, removed 12 redundant places. [2024-01-27 15:50:37,286 INFO L231 Difference]: Finished difference. Result has 480 places, 1047 transitions, 31838 flow [2024-01-27 15:50:37,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=21579, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=31838, PETRI_PLACES=480, PETRI_TRANSITIONS=1047} [2024-01-27 15:50:37,288 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 456 predicate places. [2024-01-27 15:50:37,288 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 1047 transitions, 31838 flow [2024-01-27 15:50:37,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:50:37,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:37,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:37,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:37,506 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,SelfDestructingSolverStorable13 [2024-01-27 15:50:37,506 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 15:50:37,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:37,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1593145921, now seen corresponding path program 13 times [2024-01-27 15:50:37,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:37,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803625698] [2024-01-27 15:50:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:37,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:37,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:37,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803625698] [2024-01-27 15:50:37,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803625698] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:37,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452057958] [2024-01-27 15:50:37,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:50:37,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:37,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:37,684 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 15:50:37,685 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 15:50:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:37,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:50:37,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:37,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:38,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452057958] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:38,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:38,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:50:38,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199743637] [2024-01-27 15:50:38,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:38,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:50:38,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:38,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:50:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:50:38,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:38,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 1047 transitions, 31838 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:50:38,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:38,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:38,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:42,715 INFO L124 PetriNetUnfolderBase]: 2440/4462 cut-off events. [2024-01-27 15:50:42,716 INFO L125 PetriNetUnfolderBase]: For 169953/169953 co-relation queries the response was YES. [2024-01-27 15:50:42,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56518 conditions, 4462 events. 2440/4462 cut-off events. For 169953/169953 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 28822 event pairs, 59 based on Foata normal form. 5/4467 useless extension candidates. Maximal degree in co-relation 56017. Up to 1389 conditions per place. [2024-01-27 15:50:42,770 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 439 selfloop transitions, 805 changer transitions 33/1278 dead transitions. [2024-01-27 15:50:42,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1278 transitions, 37228 flow [2024-01-27 15:50:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-01-27 15:50:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2024-01-27 15:50:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 686 transitions. [2024-01-27 15:50:42,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3947065592635213 [2024-01-27 15:50:42,772 INFO L175 Difference]: Start difference. First operand has 480 places, 1047 transitions, 31838 flow. Second operand 79 states and 686 transitions. [2024-01-27 15:50:42,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1278 transitions, 37228 flow [2024-01-27 15:50:44,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1278 transitions, 35825 flow, removed 441 selfloop flow, removed 40 redundant places. [2024-01-27 15:50:44,450 INFO L231 Difference]: Finished difference. Result has 527 places, 1060 transitions, 33240 flow [2024-01-27 15:50:44,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=30553, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=791, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=33240, PETRI_PLACES=527, PETRI_TRANSITIONS=1060} [2024-01-27 15:50:44,451 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 503 predicate places. [2024-01-27 15:50:44,452 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 1060 transitions, 33240 flow [2024-01-27 15:50:44,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:50:44,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:44,452 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:44,463 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 15:50:44,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:50:44,664 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 15:50:44,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1112756615, now seen corresponding path program 14 times [2024-01-27 15:50:44,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:44,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126538709] [2024-01-27 15:50:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:44,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:44,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:44,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126538709] [2024-01-27 15:50:44,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126538709] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:44,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531197459] [2024-01-27 15:50:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:50:44,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:44,854 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 15:50:44,855 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 15:50:44,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:44,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:44,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:50:44,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:45,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:45,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531197459] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:45,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:45,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:50:45,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340001987] [2024-01-27 15:50:45,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:45,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:50:45,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:50:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:50:45,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:45,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 1060 transitions, 33240 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:50:45,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:45,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:45,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:49,939 INFO L124 PetriNetUnfolderBase]: 2956/5364 cut-off events. [2024-01-27 15:50:49,939 INFO L125 PetriNetUnfolderBase]: For 228715/228715 co-relation queries the response was YES. [2024-01-27 15:50:49,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70269 conditions, 5364 events. 2956/5364 cut-off events. For 228715/228715 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35876 event pairs, 109 based on Foata normal form. 5/5369 useless extension candidates. Maximal degree in co-relation 69728. Up to 1671 conditions per place. [2024-01-27 15:50:50,007 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 496 selfloop transitions, 1027 changer transitions 24/1548 dead transitions. [2024-01-27 15:50:50,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 1548 transitions, 48226 flow [2024-01-27 15:50:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-01-27 15:50:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-01-27 15:50:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 732 transitions. [2024-01-27 15:50:50,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386892177589852 [2024-01-27 15:50:50,009 INFO L175 Difference]: Start difference. First operand has 527 places, 1060 transitions, 33240 flow. Second operand 86 states and 732 transitions. [2024-01-27 15:50:50,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 1548 transitions, 48226 flow [2024-01-27 15:50:52,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1548 transitions, 47013 flow, removed 62 selfloop flow, removed 54 redundant places. [2024-01-27 15:50:52,366 INFO L231 Difference]: Finished difference. Result has 583 places, 1326 transitions, 44757 flow [2024-01-27 15:50:52,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=32250, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=44757, PETRI_PLACES=583, PETRI_TRANSITIONS=1326} [2024-01-27 15:50:52,367 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 559 predicate places. [2024-01-27 15:50:52,367 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 1326 transitions, 44757 flow [2024-01-27 15:50:52,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:50:52,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:52,368 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:52,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:52,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:52,578 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 15:50:52,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2057862727, now seen corresponding path program 15 times [2024-01-27 15:50:52,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:52,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162388703] [2024-01-27 15:50:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:52,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:52,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:52,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162388703] [2024-01-27 15:50:52,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162388703] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:52,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122299354] [2024-01-27 15:50:52,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:52,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:52,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:52,755 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:52,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:50:52,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:50:52,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:52,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:50:52,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:53,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:53,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122299354] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:53,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:53,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:50:53,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953517699] [2024-01-27 15:50:53,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:53,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:50:53,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:50:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:50:53,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:53,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 1326 transitions, 44757 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:50:53,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:53,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:53,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:58,383 INFO L124 PetriNetUnfolderBase]: 3385/6133 cut-off events. [2024-01-27 15:50:58,383 INFO L125 PetriNetUnfolderBase]: For 316910/316910 co-relation queries the response was YES. [2024-01-27 15:50:58,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85994 conditions, 6133 events. 3385/6133 cut-off events. For 316910/316910 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 42166 event pairs, 135 based on Foata normal form. 4/6137 useless extension candidates. Maximal degree in co-relation 85454. Up to 2710 conditions per place. [2024-01-27 15:50:58,475 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 644 selfloop transitions, 1009 changer transitions 32/1686 dead transitions. [2024-01-27 15:50:58,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 1686 transitions, 56688 flow [2024-01-27 15:50:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-01-27 15:50:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-01-27 15:50:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 586 transitions. [2024-01-27 15:50:58,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38051948051948054 [2024-01-27 15:50:58,476 INFO L175 Difference]: Start difference. First operand has 583 places, 1326 transitions, 44757 flow. Second operand 70 states and 586 transitions. [2024-01-27 15:50:58,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 1686 transitions, 56688 flow [2024-01-27 15:51:02,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 1686 transitions, 55831 flow, removed 245 selfloop flow, removed 19 redundant places. [2024-01-27 15:51:02,962 INFO L231 Difference]: Finished difference. Result has 664 places, 1508 transitions, 54562 flow [2024-01-27 15:51:02,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=43988, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=54562, PETRI_PLACES=664, PETRI_TRANSITIONS=1508} [2024-01-27 15:51:02,964 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 640 predicate places. [2024-01-27 15:51:02,964 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1508 transitions, 54562 flow [2024-01-27 15:51:02,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:51:02,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:02,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:02,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:03,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:51:03,175 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 15:51:03,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1511198619, now seen corresponding path program 16 times [2024-01-27 15:51:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:03,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106380191] [2024-01-27 15:51:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:03,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:03,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106380191] [2024-01-27 15:51:03,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106380191] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:03,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171486879] [2024-01-27 15:51:03,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:51:03,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:03,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:03,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:03,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:51:03,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:51:03,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:03,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:51:03,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:03,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:03,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171486879] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:03,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:03,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:51:03,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409683362] [2024-01-27 15:51:03,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:03,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:51:03,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:03,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:51:03,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:51:03,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:51:03,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1508 transitions, 54562 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:51:03,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:03,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:51:03,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:07,952 INFO L124 PetriNetUnfolderBase]: 3533/6410 cut-off events. [2024-01-27 15:51:07,952 INFO L125 PetriNetUnfolderBase]: For 372277/372277 co-relation queries the response was YES. [2024-01-27 15:51:08,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94422 conditions, 6410 events. 3533/6410 cut-off events. For 372277/372277 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44587 event pairs, 166 based on Foata normal form. 7/6417 useless extension candidates. Maximal degree in co-relation 93859. Up to 3378 conditions per place. [2024-01-27 15:51:08,056 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 593 selfloop transitions, 1090 changer transitions 17/1701 dead transitions. [2024-01-27 15:51:08,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 1701 transitions, 62306 flow [2024-01-27 15:51:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-27 15:51:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-27 15:51:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 337 transitions. [2024-01-27 15:51:08,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3927738927738928 [2024-01-27 15:51:08,058 INFO L175 Difference]: Start difference. First operand has 664 places, 1508 transitions, 54562 flow. Second operand 39 states and 337 transitions. [2024-01-27 15:51:08,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 1701 transitions, 62306 flow [2024-01-27 15:51:13,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 1701 transitions, 62061 flow, removed 53 selfloop flow, removed 19 redundant places. [2024-01-27 15:51:13,722 INFO L231 Difference]: Finished difference. Result has 695 places, 1586 transitions, 61161 flow [2024-01-27 15:51:13,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54349, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=61161, PETRI_PLACES=695, PETRI_TRANSITIONS=1586} [2024-01-27 15:51:13,724 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 671 predicate places. [2024-01-27 15:51:13,724 INFO L495 AbstractCegarLoop]: Abstraction has has 695 places, 1586 transitions, 61161 flow [2024-01-27 15:51:13,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:51:13,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:13,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:13,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:13,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:51:13,935 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 15:51:13,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash -909574171, now seen corresponding path program 17 times [2024-01-27 15:51:13,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:13,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475653209] [2024-01-27 15:51:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:13,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:14,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475653209] [2024-01-27 15:51:14,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475653209] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492218916] [2024-01-27 15:51:14,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:51:14,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:14,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:14,133 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:14,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:51:14,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:51:14,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:14,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:51:14,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:14,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:14,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492218916] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:14,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:14,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:51:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395482313] [2024-01-27 15:51:14,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:14,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:51:14,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:51:14,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:51:14,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:51:14,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 1586 transitions, 61161 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:51:14,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:14,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:51:14,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:21,647 INFO L124 PetriNetUnfolderBase]: 3845/6991 cut-off events. [2024-01-27 15:51:21,647 INFO L125 PetriNetUnfolderBase]: For 485942/485942 co-relation queries the response was YES. [2024-01-27 15:51:21,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110027 conditions, 6991 events. 3845/6991 cut-off events. For 485942/485942 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 49643 event pairs, 147 based on Foata normal form. 6/6997 useless extension candidates. Maximal degree in co-relation 109619. Up to 2774 conditions per place. [2024-01-27 15:51:21,763 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 649 selfloop transitions, 1271 changer transitions 24/1945 dead transitions. [2024-01-27 15:51:21,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 1945 transitions, 73860 flow [2024-01-27 15:51:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-01-27 15:51:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-01-27 15:51:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 687 transitions. [2024-01-27 15:51:21,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.380820399113082 [2024-01-27 15:51:21,765 INFO L175 Difference]: Start difference. First operand has 695 places, 1586 transitions, 61161 flow. Second operand 82 states and 687 transitions. [2024-01-27 15:51:21,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 1945 transitions, 73860 flow [2024-01-27 15:51:28,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 1945 transitions, 73607 flow, removed 70 selfloop flow, removed 10 redundant places. [2024-01-27 15:51:28,927 INFO L231 Difference]: Finished difference. Result has 789 places, 1736 transitions, 71826 flow [2024-01-27 15:51:28,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60936, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=71826, PETRI_PLACES=789, PETRI_TRANSITIONS=1736} [2024-01-27 15:51:28,929 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 765 predicate places. [2024-01-27 15:51:28,930 INFO L495 AbstractCegarLoop]: Abstraction has has 789 places, 1736 transitions, 71826 flow [2024-01-27 15:51:28,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:51:28,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:28,930 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:28,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:29,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:29,141 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 15:51:29,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:29,141 INFO L85 PathProgramCache]: Analyzing trace with hash -762407805, now seen corresponding path program 18 times [2024-01-27 15:51:29,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:29,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504157463] [2024-01-27 15:51:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:29,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:29,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:29,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504157463] [2024-01-27 15:51:29,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504157463] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:29,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552631340] [2024-01-27 15:51:29,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:51:29,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:29,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:29,365 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:29,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:51:29,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:51:29,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:29,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:51:29,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:29,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:30,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552631340] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:30,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:30,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:51:30,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064361755] [2024-01-27 15:51:30,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:30,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:51:30,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:30,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:51:30,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:51:30,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:51:30,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 1736 transitions, 71826 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:51:30,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:30,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:51:30,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:37,499 INFO L124 PetriNetUnfolderBase]: 3870/7023 cut-off events. [2024-01-27 15:51:37,500 INFO L125 PetriNetUnfolderBase]: For 539051/539051 co-relation queries the response was YES. [2024-01-27 15:51:37,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117468 conditions, 7023 events. 3870/7023 cut-off events. For 539051/539051 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 49751 event pairs, 149 based on Foata normal form. 5/7028 useless extension candidates. Maximal degree in co-relation 117013. Up to 2781 conditions per place. [2024-01-27 15:51:37,622 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 673 selfloop transitions, 1253 changer transitions 34/1961 dead transitions. [2024-01-27 15:51:37,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 1961 transitions, 78823 flow [2024-01-27 15:51:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-01-27 15:51:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2024-01-27 15:51:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 771 transitions. [2024-01-27 15:51:37,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3612933458294283 [2024-01-27 15:51:37,624 INFO L175 Difference]: Start difference. First operand has 789 places, 1736 transitions, 71826 flow. Second operand 97 states and 771 transitions. [2024-01-27 15:51:37,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 1961 transitions, 78823 flow [2024-01-27 15:51:47,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 844 places, 1961 transitions, 77326 flow, removed 550 selfloop flow, removed 36 redundant places. [2024-01-27 15:51:47,326 INFO L231 Difference]: Finished difference. Result has 853 places, 1760 transitions, 74867 flow [2024-01-27 15:51:47,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=70437, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=74867, PETRI_PLACES=853, PETRI_TRANSITIONS=1760} [2024-01-27 15:51:47,328 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 829 predicate places. [2024-01-27 15:51:47,329 INFO L495 AbstractCegarLoop]: Abstraction has has 853 places, 1760 transitions, 74867 flow [2024-01-27 15:51:47,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:51:47,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:47,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:47,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-27 15:51:47,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:47,530 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:51:47,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash -195041315, now seen corresponding path program 19 times [2024-01-27 15:51:47,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:47,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540205415] [2024-01-27 15:51:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:47,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:47,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:47,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540205415] [2024-01-27 15:51:47,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540205415] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:47,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454663143] [2024-01-27 15:51:47,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:51:47,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:47,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:47,758 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:47,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:51:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:47,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:51:47,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:48,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:48,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454663143] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:48,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:48,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:51:48,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17218088] [2024-01-27 15:51:48,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:48,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:51:48,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:48,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:51:48,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:51:48,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:51:48,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 1760 transitions, 74867 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:51:48,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:48,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:51:48,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:55,107 INFO L124 PetriNetUnfolderBase]: 4013/7294 cut-off events. [2024-01-27 15:51:55,108 INFO L125 PetriNetUnfolderBase]: For 535399/535399 co-relation queries the response was YES. [2024-01-27 15:51:55,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122321 conditions, 7294 events. 4013/7294 cut-off events. For 535399/535399 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 52300 event pairs, 180 based on Foata normal form. 7/7301 useless extension candidates. Maximal degree in co-relation 121668. Up to 3733 conditions per place. [2024-01-27 15:51:55,246 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 727 selfloop transitions, 1249 changer transitions 23/2000 dead transitions. [2024-01-27 15:51:55,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 2000 transitions, 83542 flow [2024-01-27 15:51:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-01-27 15:51:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-01-27 15:51:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 509 transitions. [2024-01-27 15:51:55,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3615056818181818 [2024-01-27 15:51:55,247 INFO L175 Difference]: Start difference. First operand has 853 places, 1760 transitions, 74867 flow. Second operand 64 states and 509 transitions. [2024-01-27 15:51:55,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 2000 transitions, 83542 flow [2024-01-27 15:52:04,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 840 places, 2000 transitions, 82509 flow, removed 114 selfloop flow, removed 71 redundant places. [2024-01-27 15:52:04,590 INFO L231 Difference]: Finished difference. Result has 856 places, 1849 transitions, 81131 flow [2024-01-27 15:52:04,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=73877, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=81131, PETRI_PLACES=856, PETRI_TRANSITIONS=1849} [2024-01-27 15:52:04,592 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 832 predicate places. [2024-01-27 15:52:04,592 INFO L495 AbstractCegarLoop]: Abstraction has has 856 places, 1849 transitions, 81131 flow [2024-01-27 15:52:04,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:52:04,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:04,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:04,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:52:04,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:04,802 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:52:04,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:04,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1681172385, now seen corresponding path program 20 times [2024-01-27 15:52:04,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:04,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802610839] [2024-01-27 15:52:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:04,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:04,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:04,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802610839] [2024-01-27 15:52:04,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802610839] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:04,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067970604] [2024-01-27 15:52:04,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:52:04,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:04,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:04,995 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:52:04,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:52:05,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:52:05,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:05,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:52:05,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:05,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:05,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067970604] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:05,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:05,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:52:05,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555558460] [2024-01-27 15:52:05,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:05,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:52:05,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:05,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:52:05,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:52:05,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:52:05,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 856 places, 1849 transitions, 81131 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:52:05,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:05,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:52:05,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:13,717 INFO L124 PetriNetUnfolderBase]: 4330/7880 cut-off events. [2024-01-27 15:52:13,717 INFO L125 PetriNetUnfolderBase]: For 668051/668051 co-relation queries the response was YES. [2024-01-27 15:52:13,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137958 conditions, 7880 events. 4330/7880 cut-off events. For 668051/668051 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 57339 event pairs, 159 based on Foata normal form. 14/7894 useless extension candidates. Maximal degree in co-relation 137526. Up to 3373 conditions per place. [2024-01-27 15:52:13,847 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 777 selfloop transitions, 1360 changer transitions 43/2181 dead transitions. [2024-01-27 15:52:13,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 2181 transitions, 93811 flow [2024-01-27 15:52:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-01-27 15:52:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2024-01-27 15:52:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 704 transitions. [2024-01-27 15:52:13,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-01-27 15:52:13,849 INFO L175 Difference]: Start difference. First operand has 856 places, 1849 transitions, 81131 flow. Second operand 87 states and 704 transitions. [2024-01-27 15:52:13,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 2181 transitions, 93811 flow [2024-01-27 15:52:25,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 893 places, 2181 transitions, 92818 flow, removed 155 selfloop flow, removed 37 redundant places. [2024-01-27 15:52:25,317 INFO L231 Difference]: Finished difference. Result has 913 places, 1979 transitions, 90598 flow [2024-01-27 15:52:25,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=79802, PETRI_DIFFERENCE_MINUEND_PLACES=807, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=90598, PETRI_PLACES=913, PETRI_TRANSITIONS=1979} [2024-01-27 15:52:25,319 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 889 predicate places. [2024-01-27 15:52:25,319 INFO L495 AbstractCegarLoop]: Abstraction has has 913 places, 1979 transitions, 90598 flow [2024-01-27 15:52:25,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:52:25,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:25,320 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:25,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:52:25,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-01-27 15:52:25,530 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:52:25,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1534006019, now seen corresponding path program 21 times [2024-01-27 15:52:25,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:25,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744382841] [2024-01-27 15:52:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:25,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:25,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:25,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744382841] [2024-01-27 15:52:25,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744382841] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:25,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346898143] [2024-01-27 15:52:25,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:52:25,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:25,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:25,745 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:52:25,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:52:25,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:52:25,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:25,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:52:25,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:26,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:26,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346898143] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:26,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:26,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:52:26,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018221061] [2024-01-27 15:52:26,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:26,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:52:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:26,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:52:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:52:26,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:52:26,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 913 places, 1979 transitions, 90598 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:52:26,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:26,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:52:26,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:34,267 INFO L124 PetriNetUnfolderBase]: 4313/7844 cut-off events. [2024-01-27 15:52:34,267 INFO L125 PetriNetUnfolderBase]: For 761262/761262 co-relation queries the response was YES. [2024-01-27 15:52:34,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144149 conditions, 7844 events. 4313/7844 cut-off events. For 761262/761262 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 56958 event pairs, 151 based on Foata normal form. 3/7847 useless extension candidates. Maximal degree in co-relation 143777. Up to 3472 conditions per place. [2024-01-27 15:52:34,432 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 683 selfloop transitions, 1454 changer transitions 36/2174 dead transitions. [2024-01-27 15:52:34,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 984 places, 2174 transitions, 98421 flow [2024-01-27 15:52:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-01-27 15:52:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2024-01-27 15:52:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 626 transitions. [2024-01-27 15:52:34,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695395513577332 [2024-01-27 15:52:34,434 INFO L175 Difference]: Start difference. First operand has 913 places, 1979 transitions, 90598 flow. Second operand 77 states and 626 transitions. [2024-01-27 15:52:34,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 984 places, 2174 transitions, 98421 flow [2024-01-27 15:52:49,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 919 places, 2174 transitions, 96698 flow, removed 410 selfloop flow, removed 65 redundant places. [2024-01-27 15:52:49,505 INFO L231 Difference]: Finished difference. Result has 927 places, 2001 transitions, 93648 flow [2024-01-27 15:52:49,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=88998, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=93648, PETRI_PLACES=927, PETRI_TRANSITIONS=2001} [2024-01-27 15:52:49,507 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 903 predicate places. [2024-01-27 15:52:49,507 INFO L495 AbstractCegarLoop]: Abstraction has has 927 places, 2001 transitions, 93648 flow [2024-01-27 15:52:49,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:52:49,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:49,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:49,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-27 15:52:49,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-27 15:52:49,719 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:52:49,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:49,724 INFO L85 PathProgramCache]: Analyzing trace with hash -843408151, now seen corresponding path program 22 times [2024-01-27 15:52:49,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:49,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955621163] [2024-01-27 15:52:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:49,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:49,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:49,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955621163] [2024-01-27 15:52:49,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955621163] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:49,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151014199] [2024-01-27 15:52:49,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:52:49,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:49,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:50,001 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:52:50,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:52:50,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:52:50,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:50,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:52:50,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:50,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:50,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151014199] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:50,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:50,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:52:50,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34491479] [2024-01-27 15:52:50,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:50,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:52:50,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:52:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:52:50,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:52:50,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 927 places, 2001 transitions, 93648 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:52:50,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:50,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:52:50,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:59,877 INFO L124 PetriNetUnfolderBase]: 4582/8322 cut-off events. [2024-01-27 15:52:59,878 INFO L125 PetriNetUnfolderBase]: For 832813/832813 co-relation queries the response was YES. [2024-01-27 15:52:59,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156194 conditions, 8322 events. 4582/8322 cut-off events. For 832813/832813 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61190 event pairs, 194 based on Foata normal form. 3/8325 useless extension candidates. Maximal degree in co-relation 155813. Up to 4394 conditions per place. [2024-01-27 15:53:00,124 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 850 selfloop transitions, 1424 changer transitions 19/2294 dead transitions. [2024-01-27 15:53:00,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 984 places, 2294 transitions, 107587 flow [2024-01-27 15:53:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-01-27 15:53:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-01-27 15:53:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 502 transitions. [2024-01-27 15:53:00,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3621933621933622 [2024-01-27 15:53:00,132 INFO L175 Difference]: Start difference. First operand has 927 places, 2001 transitions, 93648 flow. Second operand 63 states and 502 transitions. [2024-01-27 15:53:00,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 984 places, 2294 transitions, 107587 flow [2024-01-27 15:53:14,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 935 places, 2294 transitions, 106644 flow, removed 167 selfloop flow, removed 49 redundant places. [2024-01-27 15:53:14,770 INFO L231 Difference]: Finished difference. Result has 960 places, 2151 transitions, 105642 flow [2024-01-27 15:53:14,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=92740, PETRI_DIFFERENCE_MINUEND_PLACES=873, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=105642, PETRI_PLACES=960, PETRI_TRANSITIONS=2151} [2024-01-27 15:53:14,773 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 936 predicate places. [2024-01-27 15:53:14,773 INFO L495 AbstractCegarLoop]: Abstraction has has 960 places, 2151 transitions, 105642 flow [2024-01-27 15:53:14,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:53:14,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:14,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:14,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-27 15:53:14,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:14,984 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:14,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:14,985 INFO L85 PathProgramCache]: Analyzing trace with hash 885639183, now seen corresponding path program 23 times [2024-01-27 15:53:14,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:14,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249134646] [2024-01-27 15:53:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:14,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:15,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249134646] [2024-01-27 15:53:15,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249134646] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803952768] [2024-01-27 15:53:15,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:53:15,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:15,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:15,260 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:15,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:53:15,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:53:15,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:15,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:53:15,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:15,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:15,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803952768] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:15,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:15,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:53:15,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484739291] [2024-01-27 15:53:15,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:15,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:53:15,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:15,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:53:15,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:53:15,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:53:15,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 960 places, 2151 transitions, 105642 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:53:15,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:15,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:53:15,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:26,694 INFO L124 PetriNetUnfolderBase]: 4926/8942 cut-off events. [2024-01-27 15:53:26,694 INFO L125 PetriNetUnfolderBase]: For 1027712/1027712 co-relation queries the response was YES. [2024-01-27 15:53:26,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177842 conditions, 8942 events. 4926/8942 cut-off events. For 1027712/1027712 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 66669 event pairs, 183 based on Foata normal form. 4/8946 useless extension candidates. Maximal degree in co-relation 177439. Up to 4216 conditions per place. [2024-01-27 15:53:26,972 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 841 selfloop transitions, 1648 changer transitions 19/2509 dead transitions. [2024-01-27 15:53:26,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1042 places, 2509 transitions, 123941 flow [2024-01-27 15:53:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-01-27 15:53:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2024-01-27 15:53:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 673 transitions. [2024-01-27 15:53:26,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598930481283422 [2024-01-27 15:53:26,974 INFO L175 Difference]: Start difference. First operand has 960 places, 2151 transitions, 105642 flow. Second operand 85 states and 673 transitions. [2024-01-27 15:53:26,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1042 places, 2509 transitions, 123941 flow [2024-01-27 15:53:44,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1018 places, 2509 transitions, 123470 flow, removed 90 selfloop flow, removed 24 redundant places. [2024-01-27 15:53:45,075 INFO L231 Difference]: Finished difference. Result has 1042 places, 2317 transitions, 121349 flow [2024-01-27 15:53:45,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=105191, PETRI_DIFFERENCE_MINUEND_PLACES=934, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=121349, PETRI_PLACES=1042, PETRI_TRANSITIONS=2317} [2024-01-27 15:53:45,078 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1018 predicate places. [2024-01-27 15:53:45,078 INFO L495 AbstractCegarLoop]: Abstraction has has 1042 places, 2317 transitions, 121349 flow [2024-01-27 15:53:45,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:53:45,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:45,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:45,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-27 15:53:45,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:45,290 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:53:45,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash 596642341, now seen corresponding path program 24 times [2024-01-27 15:53:45,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:45,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245558365] [2024-01-27 15:53:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:45,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:45,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:45,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245558365] [2024-01-27 15:53:45,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245558365] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:45,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386294373] [2024-01-27 15:53:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:53:45,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:45,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:45,447 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:45,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:53:45,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:53:45,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:45,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:53:45,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:45,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:53:46,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386294373] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:46,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:46,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:53:46,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651689594] [2024-01-27 15:53:46,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:46,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:53:46,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:53:46,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:53:46,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:53:46,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1042 places, 2317 transitions, 121349 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:53:46,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:46,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:53:46,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:57,545 INFO L124 PetriNetUnfolderBase]: 5265/9662 cut-off events. [2024-01-27 15:53:57,545 INFO L125 PetriNetUnfolderBase]: For 1251958/1251958 co-relation queries the response was YES. [2024-01-27 15:53:57,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201913 conditions, 9662 events. 5265/9662 cut-off events. For 1251958/1251958 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 74025 event pairs, 250 based on Foata normal form. 3/9665 useless extension candidates. Maximal degree in co-relation 201484. Up to 5547 conditions per place. [2024-01-27 15:53:57,764 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 971 selfloop transitions, 1613 changer transitions 23/2608 dead transitions. [2024-01-27 15:53:57,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1090 places, 2608 transitions, 138477 flow [2024-01-27 15:53:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-01-27 15:53:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-01-27 15:53:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 418 transitions. [2024-01-27 15:53:57,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2024-01-27 15:53:57,765 INFO L175 Difference]: Start difference. First operand has 1042 places, 2317 transitions, 121349 flow. Second operand 52 states and 418 transitions. [2024-01-27 15:53:57,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1090 places, 2608 transitions, 138477 flow [2024-01-27 15:54:25,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 2608 transitions, 136918 flow, removed 530 selfloop flow, removed 45 redundant places. [2024-01-27 15:54:25,733 INFO L231 Difference]: Finished difference. Result has 1065 places, 2467 transitions, 135424 flow [2024-01-27 15:54:25,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=119827, PETRI_DIFFERENCE_MINUEND_PLACES=994, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=135424, PETRI_PLACES=1065, PETRI_TRANSITIONS=2467} [2024-01-27 15:54:25,736 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1041 predicate places. [2024-01-27 15:54:25,736 INFO L495 AbstractCegarLoop]: Abstraction has has 1065 places, 2467 transitions, 135424 flow [2024-01-27 15:54:25,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:54:25,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:25,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:25,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:54:25,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:54:25,946 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:54:25,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:25,947 INFO L85 PathProgramCache]: Analyzing trace with hash 367919823, now seen corresponding path program 25 times [2024-01-27 15:54:25,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:25,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125718854] [2024-01-27 15:54:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:25,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:26,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:26,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125718854] [2024-01-27 15:54:26,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125718854] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:26,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923514040] [2024-01-27 15:54:26,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:54:26,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:26,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:26,177 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:54:26,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:54:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:26,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:54:26,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:26,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:26,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923514040] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:26,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:26,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:54:26,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970943132] [2024-01-27 15:54:26,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:26,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:54:26,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:54:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:54:26,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:54:26,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1065 places, 2467 transitions, 135424 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:54:26,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:26,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:54:26,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:39,671 INFO L124 PetriNetUnfolderBase]: 5431/9997 cut-off events. [2024-01-27 15:54:39,671 INFO L125 PetriNetUnfolderBase]: For 1383627/1383627 co-relation queries the response was YES. [2024-01-27 15:54:39,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216372 conditions, 9997 events. 5431/9997 cut-off events. For 1383627/1383627 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 77406 event pairs, 223 based on Foata normal form. 4/10001 useless extension candidates. Maximal degree in co-relation 215922. Up to 5032 conditions per place. [2024-01-27 15:54:39,888 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 1043 selfloop transitions, 1624 changer transitions 32/2700 dead transitions. [2024-01-27 15:54:39,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1127 places, 2700 transitions, 147659 flow [2024-01-27 15:54:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-01-27 15:54:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-01-27 15:54:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 580 transitions. [2024-01-27 15:54:39,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39348710990502034 [2024-01-27 15:54:39,890 INFO L175 Difference]: Start difference. First operand has 1065 places, 2467 transitions, 135424 flow. Second operand 67 states and 580 transitions. [2024-01-27 15:54:39,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1127 places, 2700 transitions, 147659 flow [2024-01-27 15:55:07,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1106 places, 2700 transitions, 147077 flow, removed 103 selfloop flow, removed 21 redundant places. [2024-01-27 15:55:07,333 INFO L231 Difference]: Finished difference. Result has 1120 places, 2534 transitions, 145221 flow [2024-01-27 15:55:07,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=134865, PETRI_DIFFERENCE_MINUEND_PLACES=1040, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=145221, PETRI_PLACES=1120, PETRI_TRANSITIONS=2534} [2024-01-27 15:55:07,336 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1096 predicate places. [2024-01-27 15:55:07,336 INFO L495 AbstractCegarLoop]: Abstraction has has 1120 places, 2534 transitions, 145221 flow [2024-01-27 15:55:07,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:55:07,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:07,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:07,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:07,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 15:55:07,547 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:07,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash 837088489, now seen corresponding path program 26 times [2024-01-27 15:55:07,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:07,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512338621] [2024-01-27 15:55:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:07,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:07,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:07,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512338621] [2024-01-27 15:55:07,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512338621] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:07,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739254245] [2024-01-27 15:55:07,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:07,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:07,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:07,737 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:07,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:55:07,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:07,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:07,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:55:07,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:08,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:08,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739254245] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:08,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:08,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:55:08,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47112270] [2024-01-27 15:55:08,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:08,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:55:08,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:55:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:55:08,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:55:08,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1120 places, 2534 transitions, 145221 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:55:08,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:08,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:55:08,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:22,142 INFO L124 PetriNetUnfolderBase]: 5516/10169 cut-off events. [2024-01-27 15:55:22,142 INFO L125 PetriNetUnfolderBase]: For 1525710/1525710 co-relation queries the response was YES. [2024-01-27 15:55:22,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227516 conditions, 10169 events. 5516/10169 cut-off events. For 1525710/1525710 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 79203 event pairs, 243 based on Foata normal form. 5/10174 useless extension candidates. Maximal degree in co-relation 226992. Up to 5173 conditions per place. [2024-01-27 15:55:22,383 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 977 selfloop transitions, 1768 changer transitions 24/2770 dead transitions. [2024-01-27 15:55:22,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1197 places, 2770 transitions, 157443 flow [2024-01-27 15:55:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-01-27 15:55:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-01-27 15:55:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 620 transitions. [2024-01-27 15:55:22,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3436807095343681 [2024-01-27 15:55:22,385 INFO L175 Difference]: Start difference. First operand has 1120 places, 2534 transitions, 145221 flow. Second operand 82 states and 620 transitions. [2024-01-27 15:55:22,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1197 places, 2770 transitions, 157443 flow [2024-01-27 15:55:54,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1148 places, 2770 transitions, 156644 flow, removed 67 selfloop flow, removed 49 redundant places. [2024-01-27 15:55:54,334 INFO L231 Difference]: Finished difference. Result has 1168 places, 2600 transitions, 154893 flow [2024-01-27 15:55:54,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=144446, PETRI_DIFFERENCE_MINUEND_PLACES=1067, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=154893, PETRI_PLACES=1168, PETRI_TRANSITIONS=2600} [2024-01-27 15:55:54,337 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1144 predicate places. [2024-01-27 15:55:54,337 INFO L495 AbstractCegarLoop]: Abstraction has has 1168 places, 2600 transitions, 154893 flow [2024-01-27 15:55:54,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:55:54,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:54,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:54,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:54,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:55:54,542 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:54,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1946004443, now seen corresponding path program 27 times [2024-01-27 15:55:54,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:54,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282700253] [2024-01-27 15:55:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:54,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:54,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:54,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282700253] [2024-01-27 15:55:54,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282700253] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178044973] [2024-01-27 15:55:54,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:55:54,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:54,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:54,753 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:54,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-27 15:55:54,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:55:54,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:54,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:55:54,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:55,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:55,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178044973] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:55,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:55,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:55:55,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330842192] [2024-01-27 15:55:55,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:55,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:55:55,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:55,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:55:55,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:55:55,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:55:55,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1168 places, 2600 transitions, 154893 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:55:55,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:55,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:55:55,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:13,326 INFO L124 PetriNetUnfolderBase]: 5746/10610 cut-off events. [2024-01-27 15:56:13,327 INFO L125 PetriNetUnfolderBase]: For 1778146/1778146 co-relation queries the response was YES. [2024-01-27 15:56:13,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247840 conditions, 10610 events. 5746/10610 cut-off events. For 1778146/1778146 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 83446 event pairs, 235 based on Foata normal form. 7/10617 useless extension candidates. Maximal degree in co-relation 247289. Up to 4737 conditions per place. [2024-01-27 15:56:13,591 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 1009 selfloop transitions, 1860 changer transitions 38/2908 dead transitions. [2024-01-27 15:56:13,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1255 places, 2908 transitions, 170768 flow [2024-01-27 15:56:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-01-27 15:56:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2024-01-27 15:56:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 764 transitions. [2024-01-27 15:56:13,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734115347018573 [2024-01-27 15:56:13,593 INFO L175 Difference]: Start difference. First operand has 1168 places, 2600 transitions, 154893 flow. Second operand 93 states and 764 transitions. [2024-01-27 15:56:13,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1255 places, 2908 transitions, 170768 flow [2024-01-27 15:56:56,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1211 places, 2908 transitions, 169341 flow, removed 252 selfloop flow, removed 44 redundant places. [2024-01-27 15:56:56,821 INFO L231 Difference]: Finished difference. Result has 1233 places, 2695 transitions, 166434 flow [2024-01-27 15:56:56,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=153536, PETRI_DIFFERENCE_MINUEND_PLACES=1119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=166434, PETRI_PLACES=1233, PETRI_TRANSITIONS=2695} [2024-01-27 15:56:56,825 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1209 predicate places. [2024-01-27 15:56:56,825 INFO L495 AbstractCegarLoop]: Abstraction has has 1233 places, 2695 transitions, 166434 flow [2024-01-27 15:56:56,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:56:56,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:56,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:56,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-01-27 15:56:57,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:56:57,046 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:56:57,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:57,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2134061571, now seen corresponding path program 28 times [2024-01-27 15:56:57,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:57,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938003287] [2024-01-27 15:56:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:57,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:56:57,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:57,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938003287] [2024-01-27 15:56:57,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938003287] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:56:57,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925417869] [2024-01-27 15:56:57,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:56:57,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:56:57,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:56:57,240 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:56:57,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-27 15:56:57,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:56:57,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:56:57,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:56:57,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:56:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:56:57,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:56:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:56:57,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925417869] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:56:57,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:56:57,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:56:57,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731545895] [2024-01-27 15:56:57,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:56:57,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:56:57,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:57,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:56:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:56:57,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:56:57,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1233 places, 2695 transitions, 166434 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:56:57,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:57,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:56:57,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:18,911 INFO L124 PetriNetUnfolderBase]: 5863/10837 cut-off events. [2024-01-27 15:57:18,911 INFO L125 PetriNetUnfolderBase]: For 1921063/1921063 co-relation queries the response was YES. [2024-01-27 15:57:19,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260329 conditions, 10837 events. 5863/10837 cut-off events. For 1921063/1921063 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 85730 event pairs, 287 based on Foata normal form. 3/10840 useless extension candidates. Maximal degree in co-relation 259999. Up to 6077 conditions per place. [2024-01-27 15:57:19,211 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 1056 selfloop transitions, 1815 changer transitions 14/2886 dead transitions. [2024-01-27 15:57:19,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1271 places, 2886 transitions, 178767 flow [2024-01-27 15:57:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:57:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:57:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 369 transitions. [2024-01-27 15:57:19,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.381198347107438 [2024-01-27 15:57:19,212 INFO L175 Difference]: Start difference. First operand has 1233 places, 2695 transitions, 166434 flow. Second operand 44 states and 369 transitions. [2024-01-27 15:57:19,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1271 places, 2886 transitions, 178767 flow [2024-01-27 15:58:02,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1212 places, 2886 transitions, 177696 flow, removed 214 selfloop flow, removed 59 redundant places. [2024-01-27 15:58:03,068 INFO L231 Difference]: Finished difference. Result has 1226 places, 2764 transitions, 176701 flow [2024-01-27 15:58:03,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=165381, PETRI_DIFFERENCE_MINUEND_PLACES=1169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=912, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=176701, PETRI_PLACES=1226, PETRI_TRANSITIONS=2764} [2024-01-27 15:58:03,071 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1202 predicate places. [2024-01-27 15:58:03,071 INFO L495 AbstractCegarLoop]: Abstraction has has 1226 places, 2764 transitions, 176701 flow [2024-01-27 15:58:03,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:58:03,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:03,072 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:03,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:03,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:03,283 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:03,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:03,284 INFO L85 PathProgramCache]: Analyzing trace with hash -8770519, now seen corresponding path program 29 times [2024-01-27 15:58:03,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:03,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901559964] [2024-01-27 15:58:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:03,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:03,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:03,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901559964] [2024-01-27 15:58:03,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901559964] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:03,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154890743] [2024-01-27 15:58:03,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:58:03,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:03,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:03,464 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:03,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-27 15:58:03,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:58:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:03,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:58:03,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:03,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:58:04,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154890743] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:04,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:04,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:58:04,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950433986] [2024-01-27 15:58:04,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:04,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:58:04,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:58:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:58:04,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:58:04,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1226 places, 2764 transitions, 176701 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:58:04,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:04,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:58:04,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:22,904 INFO L124 PetriNetUnfolderBase]: 6136/11371 cut-off events. [2024-01-27 15:58:22,905 INFO L125 PetriNetUnfolderBase]: For 2262563/2262563 co-relation queries the response was YES. [2024-01-27 15:58:23,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283390 conditions, 11371 events. 6136/11371 cut-off events. For 2262563/2262563 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 90996 event pairs, 263 based on Foata normal form. 12/11383 useless extension candidates. Maximal degree in co-relation 282811. Up to 5214 conditions per place. [2024-01-27 15:58:23,346 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 1083 selfloop transitions, 1941 changer transitions 44/3069 dead transitions. [2024-01-27 15:58:23,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1304 places, 3069 transitions, 194719 flow [2024-01-27 15:58:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-01-27 15:58:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2024-01-27 15:58:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 678 transitions. [2024-01-27 15:58:23,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38047138047138046 [2024-01-27 15:58:23,348 INFO L175 Difference]: Start difference. First operand has 1226 places, 2764 transitions, 176701 flow. Second operand 81 states and 678 transitions. [2024-01-27 15:58:23,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1304 places, 3069 transitions, 194719 flow [2024-01-27 15:59:11,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1281 places, 3069 transitions, 194304 flow, removed 19 selfloop flow, removed 23 redundant places. [2024-01-27 15:59:11,641 INFO L231 Difference]: Finished difference. Result has 1302 places, 2868 transitions, 191124 flow [2024-01-27 15:59:11,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=176000, PETRI_DIFFERENCE_MINUEND_PLACES=1201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=191124, PETRI_PLACES=1302, PETRI_TRANSITIONS=2868} [2024-01-27 15:59:11,644 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1278 predicate places. [2024-01-27 15:59:11,644 INFO L495 AbstractCegarLoop]: Abstraction has has 1302 places, 2868 transitions, 191124 flow [2024-01-27 15:59:11,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 15:59:11,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:11,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:11,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:11,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:11,856 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:11,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:11,857 INFO L85 PathProgramCache]: Analyzing trace with hash -155936885, now seen corresponding path program 30 times [2024-01-27 15:59:11,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:11,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609089426] [2024-01-27 15:59:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:12,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:12,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609089426] [2024-01-27 15:59:12,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609089426] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:12,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387014823] [2024-01-27 15:59:12,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:59:12,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:12,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:12,023 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:12,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-27 15:59:12,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:59:12,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:12,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 15:59:12,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:12,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:59:12,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387014823] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:12,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:12,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 15:59:12,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674730367] [2024-01-27 15:59:12,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:12,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:59:12,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:59:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:59:12,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:59:12,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1302 places, 2868 transitions, 191124 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 15:59:12,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:12,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:59:12,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:34,237 INFO L124 PetriNetUnfolderBase]: 6110/11331 cut-off events. [2024-01-27 15:59:34,237 INFO L125 PetriNetUnfolderBase]: For 2503962/2503962 co-relation queries the response was YES. [2024-01-27 15:59:34,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292866 conditions, 11331 events. 6110/11331 cut-off events. For 2503962/2503962 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 90674 event pairs, 259 based on Foata normal form. 3/11334 useless extension candidates. Maximal degree in co-relation 292260. Up to 4966 conditions per place. [2024-01-27 15:59:34,530 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 907 selfloop transitions, 2129 changer transitions 43/3080 dead transitions. [2024-01-27 15:59:34,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1382 places, 3080 transitions, 202242 flow [2024-01-27 15:59:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-01-27 15:59:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-01-27 15:59:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 680 transitions. [2024-01-27 15:59:34,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3594080338266385 [2024-01-27 15:59:34,532 INFO L175 Difference]: Start difference. First operand has 1302 places, 2868 transitions, 191124 flow. Second operand 86 states and 680 transitions. [2024-01-27 15:59:34,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1382 places, 3080 transitions, 202242 flow [2024-01-27 16:00:29,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1338 places, 3080 transitions, 201090 flow, removed 365 selfloop flow, removed 44 redundant places. [2024-01-27 16:00:29,977 INFO L231 Difference]: Finished difference. Result has 1346 places, 2884 transitions, 196469 flow [2024-01-27 16:00:29,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=190111, PETRI_DIFFERENCE_MINUEND_PLACES=1253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=196469, PETRI_PLACES=1346, PETRI_TRANSITIONS=2884} [2024-01-27 16:00:29,981 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1322 predicate places. [2024-01-27 16:00:29,981 INFO L495 AbstractCegarLoop]: Abstraction has has 1346 places, 2884 transitions, 196469 flow [2024-01-27 16:00:29,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 16:00:29,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:29,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:00:29,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-27 16:00:30,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-01-27 16:00:30,193 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:00:30,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash 351028551, now seen corresponding path program 31 times [2024-01-27 16:00:30,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:30,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764632662] [2024-01-27 16:00:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:30,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:00:30,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:30,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764632662] [2024-01-27 16:00:30,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764632662] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:30,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661827402] [2024-01-27 16:00:30,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:00:30,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:30,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:30,384 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:00:30,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-27 16:00:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:30,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 16:00:30,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:00:30,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:00:31,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661827402] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:31,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:31,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 16:00:31,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441580429] [2024-01-27 16:00:31,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:31,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 16:00:31,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:31,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 16:00:31,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 16:00:31,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 16:00:31,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1346 places, 2884 transitions, 196469 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 16:00:31,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:31,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 16:00:31,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:53,582 INFO L124 PetriNetUnfolderBase]: 6378/11815 cut-off events. [2024-01-27 16:00:53,583 INFO L125 PetriNetUnfolderBase]: For 2651492/2651492 co-relation queries the response was YES. [2024-01-27 16:00:53,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313286 conditions, 11815 events. 6378/11815 cut-off events. For 2651492/2651492 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 95050 event pairs, 279 based on Foata normal form. 4/11819 useless extension candidates. Maximal degree in co-relation 312674. Up to 6549 conditions per place. [2024-01-27 16:00:54,023 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 1215 selfloop transitions, 1916 changer transitions 25/3157 dead transitions. [2024-01-27 16:00:54,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1404 places, 3157 transitions, 214373 flow [2024-01-27 16:00:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-01-27 16:00:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-01-27 16:00:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 535 transitions. [2024-01-27 16:00:54,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741258741258741 [2024-01-27 16:00:54,024 INFO L175 Difference]: Start difference. First operand has 1346 places, 2884 transitions, 196469 flow. Second operand 65 states and 535 transitions. [2024-01-27 16:00:54,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1404 places, 3157 transitions, 214373 flow [2024-01-27 16:01:57,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1339 places, 3157 transitions, 213025 flow, removed 157 selfloop flow, removed 65 redundant places. [2024-01-27 16:01:57,697 INFO L231 Difference]: Finished difference. Result has 1363 places, 3014 transitions, 212014 flow [2024-01-27 16:01:57,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=195166, PETRI_DIFFERENCE_MINUEND_PLACES=1275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1038, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=212014, PETRI_PLACES=1363, PETRI_TRANSITIONS=3014} [2024-01-27 16:01:57,699 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1339 predicate places. [2024-01-27 16:01:57,699 INFO L495 AbstractCegarLoop]: Abstraction has has 1363 places, 3014 transitions, 212014 flow [2024-01-27 16:01:57,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 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 16:01:57,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:57,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:57,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:57,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:57,911 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:01:57,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash 624932871, now seen corresponding path program 32 times [2024-01-27 16:01:57,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:57,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615372997] [2024-01-27 16:01:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:57,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:58,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:58,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615372997] [2024-01-27 16:01:58,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615372997] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:01:58,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742143326] [2024-01-27 16:01:58,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:01:58,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:58,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:58,079 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:01:58,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-27 16:01:58,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:01:58,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:01:58,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 16:01:58,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:58,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:01:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:01:58,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742143326] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:01:58,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:01:58,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 16:01:58,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930837505] [2024-01-27 16:01:58,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:01:58,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 16:01:58,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:58,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 16:01:58,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 16:01:58,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 16:01:58,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1363 places, 3014 transitions, 212014 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 16:01:58,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:58,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 16:01:58,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:02:24,427 INFO L124 PetriNetUnfolderBase]: 6892/12768 cut-off events. [2024-01-27 16:02:24,428 INFO L125 PetriNetUnfolderBase]: For 3174828/3174828 co-relation queries the response was YES. [2024-01-27 16:02:24,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349783 conditions, 12768 events. 6892/12768 cut-off events. For 3174828/3174828 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 104410 event pairs, 295 based on Foata normal form. 6/12774 useless extension candidates. Maximal degree in co-relation 349148. Up to 6858 conditions per place. [2024-01-27 16:02:24,897 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 1273 selfloop transitions, 2165 changer transitions 26/3465 dead transitions. [2024-01-27 16:02:24,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1445 places, 3465 transitions, 241726 flow [2024-01-27 16:02:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-01-27 16:02:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2024-01-27 16:02:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 657 transitions. [2024-01-27 16:02:24,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3432601880877743 [2024-01-27 16:02:24,899 INFO L175 Difference]: Start difference. First operand has 1363 places, 3014 transitions, 212014 flow. Second operand 87 states and 657 transitions. [2024-01-27 16:02:24,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1445 places, 3465 transitions, 241726 flow [2024-01-27 16:03:31,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1410 places, 3465 transitions, 239828 flow, removed 105 selfloop flow, removed 35 redundant places. [2024-01-27 16:03:31,477 INFO L231 Difference]: Finished difference. Result has 1440 places, 3280 transitions, 238230 flow [2024-01-27 16:03:31,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=210309, PETRI_DIFFERENCE_MINUEND_PLACES=1324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1935, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=238230, PETRI_PLACES=1440, PETRI_TRANSITIONS=3280} [2024-01-27 16:03:31,479 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1416 predicate places. [2024-01-27 16:03:31,480 INFO L495 AbstractCegarLoop]: Abstraction has has 1440 places, 3280 transitions, 238230 flow [2024-01-27 16:03:31,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 16:03:31,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:03:31,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:03:31,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-27 16:03:31,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:03:31,692 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:03:31,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:03:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 384486723, now seen corresponding path program 33 times [2024-01-27 16:03:31,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:03:31,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146205680] [2024-01-27 16:03:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:03:31,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:03:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:03:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:03:31,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:03:31,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146205680] [2024-01-27 16:03:31,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146205680] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:03:31,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641213714] [2024-01-27 16:03:31,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:03:31,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:03:31,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:03:31,886 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:03:31,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-27 16:03:31,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 16:03:31,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:03:31,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2024-01-27 16:03:31,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:03:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:03:32,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:03:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:03:32,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641213714] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:03:32,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:03:32,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-01-27 16:03:32,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598720598] [2024-01-27 16:03:32,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:03:32,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 16:03:32,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:03:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 16:03:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 16:03:32,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 16:03:32,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1440 places, 3280 transitions, 238230 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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 16:03:32,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:03:32,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 16:03:32,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand