./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.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.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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:50:15,986 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:50:16,056 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:50:16,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:50:16,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:50:16,090 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:50:16,091 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:50:16,092 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:50:16,092 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:50:16,095 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:50:16,095 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:50:16,096 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:50:16,096 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:50:16,097 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:50:16,097 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:50:16,098 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:50:16,098 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:50:16,098 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:50:16,098 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:50:16,098 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:50:16,099 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:50:16,099 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:50:16,099 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:50:16,099 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:50:16,100 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:50:16,100 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:50:16,100 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:50:16,100 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:50:16,101 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:50:16,101 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:50:16,101 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:50:16,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:50:16,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:50:16,102 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:50:16,102 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:50:16,102 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:50:16,102 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:50:16,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:50:16,103 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:50:16,103 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:50:16,103 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:50:16,103 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:50:16,103 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:50:16,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2024-01-27 15:50:16,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:50:16,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:50:16,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:50:16,338 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:50:16,338 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:50:16,339 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-01-27 15:50:17,432 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:50:17,591 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:50:17,592 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-01-27 15:50:17,597 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b4a4c0f/5f1e9246c144451eb2ce93b6b853a8b8/FLAG12c9760bc [2024-01-27 15:50:17,606 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b4a4c0f/5f1e9246c144451eb2ce93b6b853a8b8 [2024-01-27 15:50:17,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:50:17,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:50:17,610 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:50:17,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:50:17,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:50:17,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd8d418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17, skipping insertion in model container [2024-01-27 15:50:17,617 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,630 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:50:17,738 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.wvr.c[2063,2076] [2024-01-27 15:50:17,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:50:17,748 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:50:17,763 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.wvr.c[2063,2076] [2024-01-27 15:50:17,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:50:17,774 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:50:17,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17 WrapperNode [2024-01-27 15:50:17,775 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:50:17,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:50:17,776 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:50:17,776 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:50:17,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,797 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2024-01-27 15:50:17,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:50:17,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:50:17,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:50:17,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:50:17,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,807 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,816 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 15:50:17,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,820 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,822 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,825 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:50:17,830 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:50:17,831 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:50:17,831 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:50:17,831 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (1/1) ... [2024-01-27 15:50:17,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:50:17,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:17,857 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 15:50:17,872 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 15:50:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:50:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:50:17,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:50:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:50:17,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:50:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:50:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:50:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:50:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:50:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:50:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:50:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:50:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:50:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:50:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:50:17,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:50:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:50:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:50:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:50:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:50:17,903 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 15:50:17,989 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:50:17,990 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:50:18,117 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:50:18,117 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:50:18,246 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:50:18,249 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:50:18,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:50:18 BoogieIcfgContainer [2024-01-27 15:50:18,249 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:50:18,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:50:18,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:50:18,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:50:18,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:50:17" (1/3) ... [2024-01-27 15:50:18,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba1e85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:50:18, skipping insertion in model container [2024-01-27 15:50:18,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:50:17" (2/3) ... [2024-01-27 15:50:18,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba1e85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:50:18, skipping insertion in model container [2024-01-27 15:50:18,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:50:18" (3/3) ... [2024-01-27 15:50:18,257 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-01-27 15:50:18,264 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:50:18,271 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:50:18,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:50:18,272 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:50:18,308 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:50:18,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-01-27 15:50:18,364 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-01-27 15:50:18,364 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:50:18,366 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 15:50:18,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-01-27 15:50:18,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-01-27 15:50:18,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:50:18,380 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;@2b21cf0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:50:18,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:50:18,386 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:50:18,386 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-01-27 15:50:18,386 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:50:18,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:18,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:18,388 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 15:50:18,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:18,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2145107019, now seen corresponding path program 1 times [2024-01-27 15:50:18,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:18,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640151832] [2024-01-27 15:50:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:18,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:18,682 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 15:50:18,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640151832] [2024-01-27 15:50:18,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640151832] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:50:18,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:50:18,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:50:18,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145667104] [2024-01-27 15:50:18,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:50:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:50:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:18,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:50:18,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:50:18,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-01-27 15:50:18,729 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 15:50:18,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:18,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-01-27 15:50:18,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:18,823 INFO L124 PetriNetUnfolderBase]: 65/133 cut-off events. [2024-01-27 15:50:18,823 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-27 15:50:18,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 133 events. 65/133 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 409 event pairs, 33 based on Foata normal form. 10/138 useless extension candidates. Maximal degree in co-relation 214. Up to 92 conditions per place. [2024-01-27 15:50:18,826 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-01-27 15:50:18,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 117 flow [2024-01-27 15:50:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:50:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:50:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-01-27 15:50:18,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-01-27 15:50:18,837 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 4 states and 45 transitions. [2024-01-27 15:50:18,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 117 flow [2024-01-27 15:50:18,839 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 15:50:18,840 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2024-01-27 15:50:18,842 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 15:50:18,844 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 0 predicate places. [2024-01-27 15:50:18,844 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2024-01-27 15:50:18,845 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 15:50:18,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:18,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:18,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:50:18,845 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 15:50:18,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:18,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1748902405, now seen corresponding path program 1 times [2024-01-27 15:50:18,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:18,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949702993] [2024-01-27 15:50:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:18,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:18,915 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 15:50:18,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:18,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949702993] [2024-01-27 15:50:18,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949702993] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:50:18,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:50:18,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:50:18,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292557160] [2024-01-27 15:50:18,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:50:18,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:50:18,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:50:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:50:18,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-01-27 15:50:18,925 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 15:50:18,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:18,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-01-27 15:50:18,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:19,013 INFO L124 PetriNetUnfolderBase]: 93/187 cut-off events. [2024-01-27 15:50:19,013 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-01-27 15:50:19,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 187 events. 93/187 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 614 event pairs, 39 based on Foata normal form. 10/196 useless extension candidates. Maximal degree in co-relation 106. Up to 116 conditions per place. [2024-01-27 15:50:19,016 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-01-27 15:50:19,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 137 flow [2024-01-27 15:50:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:50:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:50:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-01-27 15:50:19,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-01-27 15:50:19,019 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 4 states and 45 transitions. [2024-01-27 15:50:19,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 137 flow [2024-01-27 15:50:19,021 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 15:50:19,022 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 66 flow [2024-01-27 15:50:19,022 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 15:50:19,023 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2024-01-27 15:50:19,023 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 66 flow [2024-01-27 15:50:19,023 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 15:50:19,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:19,024 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 15:50:19,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:50:19,027 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 15:50:19,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:19,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1297323035, now seen corresponding path program 1 times [2024-01-27 15:50:19,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:19,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002418525] [2024-01-27 15:50:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:19,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:50:19,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:19,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002418525] [2024-01-27 15:50:19,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002418525] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:50:19,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:50:19,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:50:19,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295335275] [2024-01-27 15:50:19,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:50:19,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:50:19,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:19,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:50:19,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:50:19,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2024-01-27 15:50:19,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 15:50:19,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:19,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2024-01-27 15:50:19,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:19,243 INFO L124 PetriNetUnfolderBase]: 163/327 cut-off events. [2024-01-27 15:50:19,243 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2024-01-27 15:50:19,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 327 events. 163/327 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1246 event pairs, 23 based on Foata normal form. 1/323 useless extension candidates. Maximal degree in co-relation 235. Up to 103 conditions per place. [2024-01-27 15:50:19,248 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 37 selfloop transitions, 5 changer transitions 4/49 dead transitions. [2024-01-27 15:50:19,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 247 flow [2024-01-27 15:50:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:50:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:50:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-01-27 15:50:19,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-01-27 15:50:19,251 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 66 flow. Second operand 4 states and 62 transitions. [2024-01-27 15:50:19,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 247 flow [2024-01-27 15:50:19,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 49 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:50:19,254 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 100 flow [2024-01-27 15:50:19,254 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-01-27 15:50:19,255 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-01-27 15:50:19,256 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 100 flow [2024-01-27 15:50:19,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 15:50:19,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:19,256 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 15:50:19,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:50:19,256 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 15:50:19,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:19,257 INFO L85 PathProgramCache]: Analyzing trace with hash 839591217, now seen corresponding path program 2 times [2024-01-27 15:50:19,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:19,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406400943] [2024-01-27 15:50:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:19,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:19,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:19,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406400943] [2024-01-27 15:50:19,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406400943] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:19,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585480892] [2024-01-27 15:50:19,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:50:19,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:19,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:19,377 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 15:50:19,396 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 15:50:19,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:19,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:19,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:50:19,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:19,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:19,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585480892] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:19,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:19,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-01-27 15:50:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379145463] [2024-01-27 15:50:19,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:19,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:50:19,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:50:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:50:19,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-01-27 15:50:19,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 100 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 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 15:50:19,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:19,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-01-27 15:50:19,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:19,864 INFO L124 PetriNetUnfolderBase]: 309/576 cut-off events. [2024-01-27 15:50:19,864 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-01-27 15:50:19,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 576 events. 309/576 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2431 event pairs, 49 based on Foata normal form. 20/595 useless extension candidates. Maximal degree in co-relation 507. Up to 266 conditions per place. [2024-01-27 15:50:19,868 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 43 selfloop transitions, 13 changer transitions 0/58 dead transitions. [2024-01-27 15:50:19,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 58 transitions, 347 flow [2024-01-27 15:50:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:50:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:50:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-01-27 15:50:19,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-01-27 15:50:19,869 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 100 flow. Second operand 6 states and 67 transitions. [2024-01-27 15:50:19,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 58 transitions, 347 flow [2024-01-27 15:50:19,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 347 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:50:19,873 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 221 flow [2024-01-27 15:50:19,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-01-27 15:50:19,875 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 14 predicate places. [2024-01-27 15:50:19,875 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 221 flow [2024-01-27 15:50:19,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 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 15:50:19,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:19,876 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 15:50:19,887 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 15:50:20,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:20,088 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 15:50:20,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1068950307, now seen corresponding path program 3 times [2024-01-27 15:50:20,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:20,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630484424] [2024-01-27 15:50:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:20,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:20,211 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 15:50:20,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:20,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630484424] [2024-01-27 15:50:20,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630484424] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:20,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274694224] [2024-01-27 15:50:20,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:20,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:20,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:20,228 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 15:50:20,232 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 15:50:20,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:50:20,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:20,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:50:20,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:20,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:20,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274694224] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:20,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:20,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-27 15:50:20,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194621966] [2024-01-27 15:50:20,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:20,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:50:20,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:20,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:50:20,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:50:20,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:20,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 221 flow. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 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 15:50:20,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:20,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:20,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:21,204 INFO L124 PetriNetUnfolderBase]: 687/1196 cut-off events. [2024-01-27 15:50:21,204 INFO L125 PetriNetUnfolderBase]: For 2149/2149 co-relation queries the response was YES. [2024-01-27 15:50:21,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1196 events. 687/1196 cut-off events. For 2149/2149 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5415 event pairs, 22 based on Foata normal form. 42/1238 useless extension candidates. Maximal degree in co-relation 2817. Up to 253 conditions per place. [2024-01-27 15:50:21,211 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 151 selfloop transitions, 81 changer transitions 24/257 dead transitions. [2024-01-27 15:50:21,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 257 transitions, 1757 flow [2024-01-27 15:50:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-27 15:50:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-27 15:50:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 343 transitions. [2024-01-27 15:50:21,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997668997668998 [2024-01-27 15:50:21,216 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 221 flow. Second operand 39 states and 343 transitions. [2024-01-27 15:50:21,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 257 transitions, 1757 flow [2024-01-27 15:50:21,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 257 transitions, 1749 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-01-27 15:50:21,227 INFO L231 Difference]: Finished difference. Result has 96 places, 100 transitions, 968 flow [2024-01-27 15:50:21,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=968, PETRI_PLACES=96, PETRI_TRANSITIONS=100} [2024-01-27 15:50:21,229 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 72 predicate places. [2024-01-27 15:50:21,229 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 100 transitions, 968 flow [2024-01-27 15:50:21,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 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 15:50:21,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:21,230 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 15:50:21,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-27 15:50:21,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:21,441 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 15:50:21,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash 792340647, now seen corresponding path program 4 times [2024-01-27 15:50:21,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:21,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060067886] [2024-01-27 15:50:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:21,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:21,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:21,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060067886] [2024-01-27 15:50:21,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060067886] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:21,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479770230] [2024-01-27 15:50:21,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:50:21,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:21,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:21,553 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 15:50:21,568 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 15:50:21,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:50:21,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:21,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:50:21,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:21,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:21,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479770230] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:21,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:21,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-01-27 15:50:21,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599864955] [2024-01-27 15:50:21,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:21,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:50:21,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:21,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:50:21,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:50:21,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:21,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 100 transitions, 968 flow. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 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 15:50:21,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:21,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:21,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:22,264 INFO L124 PetriNetUnfolderBase]: 1078/1854 cut-off events. [2024-01-27 15:50:22,265 INFO L125 PetriNetUnfolderBase]: For 20716/20716 co-relation queries the response was YES. [2024-01-27 15:50:22,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10035 conditions, 1854 events. 1078/1854 cut-off events. For 20716/20716 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9222 event pairs, 29 based on Foata normal form. 96/1950 useless extension candidates. Maximal degree in co-relation 8905. Up to 355 conditions per place. [2024-01-27 15:50:22,281 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 152 selfloop transitions, 158 changer transitions 3/314 dead transitions. [2024-01-27 15:50:22,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 314 transitions, 3438 flow [2024-01-27 15:50:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:50:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:50:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 254 transitions. [2024-01-27 15:50:22,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-01-27 15:50:22,283 INFO L175 Difference]: Start difference. First operand has 96 places, 100 transitions, 968 flow. Second operand 28 states and 254 transitions. [2024-01-27 15:50:22,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 314 transitions, 3438 flow [2024-01-27 15:50:22,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 314 transitions, 3215 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-01-27 15:50:22,310 INFO L231 Difference]: Finished difference. Result has 136 places, 197 transitions, 2418 flow [2024-01-27 15:50:22,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2418, PETRI_PLACES=136, PETRI_TRANSITIONS=197} [2024-01-27 15:50:22,311 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 112 predicate places. [2024-01-27 15:50:22,311 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 197 transitions, 2418 flow [2024-01-27 15:50:22,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 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 15:50:22,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:22,312 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 15:50:22,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:22,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:22,527 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 15:50:22,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1346703031, now seen corresponding path program 5 times [2024-01-27 15:50:22,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:22,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807302981] [2024-01-27 15:50:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:22,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:22,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:22,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807302981] [2024-01-27 15:50:22,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807302981] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:22,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015725511] [2024-01-27 15:50:22,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:50:22,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:22,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:22,618 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 15:50:22,652 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 15:50:22,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:50:22,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:22,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:50:22,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:22,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:22,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015725511] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:22,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:22,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:50:22,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457563217] [2024-01-27 15:50:22,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:22,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:50:22,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:22,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:50:22,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:50:22,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:22,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 197 transitions, 2418 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 15:50:22,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:22,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:22,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:23,560 INFO L124 PetriNetUnfolderBase]: 1745/2963 cut-off events. [2024-01-27 15:50:23,560 INFO L125 PetriNetUnfolderBase]: For 55912/55912 co-relation queries the response was YES. [2024-01-27 15:50:23,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20507 conditions, 2963 events. 1745/2963 cut-off events. For 55912/55912 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16067 event pairs, 29 based on Foata normal form. 28/2991 useless extension candidates. Maximal degree in co-relation 16904. Up to 538 conditions per place. [2024-01-27 15:50:23,587 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 207 selfloop transitions, 252 changer transitions 0/460 dead transitions. [2024-01-27 15:50:23,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 460 transitions, 6435 flow [2024-01-27 15:50:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:50:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:50:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 261 transitions. [2024-01-27 15:50:23,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-01-27 15:50:23,589 INFO L175 Difference]: Start difference. First operand has 136 places, 197 transitions, 2418 flow. Second operand 29 states and 261 transitions. [2024-01-27 15:50:23,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 460 transitions, 6435 flow [2024-01-27 15:50:23,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 460 transitions, 6230 flow, removed 96 selfloop flow, removed 2 redundant places. [2024-01-27 15:50:23,763 INFO L231 Difference]: Finished difference. Result has 175 places, 321 transitions, 4989 flow [2024-01-27 15:50:23,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4989, PETRI_PLACES=175, PETRI_TRANSITIONS=321} [2024-01-27 15:50:23,764 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 151 predicate places. [2024-01-27 15:50:23,764 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 321 transitions, 4989 flow [2024-01-27 15:50:23,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 15:50:23,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:23,765 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 15:50:23,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:23,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:23,972 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 15:50:23,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:23,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1106256883, now seen corresponding path program 6 times [2024-01-27 15:50:23,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:23,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421585366] [2024-01-27 15:50:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:23,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:24,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421585366] [2024-01-27 15:50:24,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421585366] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:24,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767870829] [2024-01-27 15:50:24,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:50:24,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:24,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:24,058 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 15:50:24,083 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 15:50:24,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:50:24,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:24,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:50:24,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:24,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:24,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767870829] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:24,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:24,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 15:50:24,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722470323] [2024-01-27 15:50:24,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:24,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:50:24,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:50:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:50:24,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:24,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 321 transitions, 4989 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 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 15:50:24,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:24,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:24,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:25,540 INFO L124 PetriNetUnfolderBase]: 2291/3889 cut-off events. [2024-01-27 15:50:25,540 INFO L125 PetriNetUnfolderBase]: For 108495/108495 co-relation queries the response was YES. [2024-01-27 15:50:25,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30370 conditions, 3889 events. 2291/3889 cut-off events. For 108495/108495 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 21577 event pairs, 55 based on Foata normal form. 112/4001 useless extension candidates. Maximal degree in co-relation 26198. Up to 706 conditions per place. [2024-01-27 15:50:25,633 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 218 selfloop transitions, 442 changer transitions 4/665 dead transitions. [2024-01-27 15:50:25,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 665 transitions, 11119 flow [2024-01-27 15:50:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-27 15:50:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-27 15:50:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 408 transitions. [2024-01-27 15:50:25,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784786641929499 [2024-01-27 15:50:25,636 INFO L175 Difference]: Start difference. First operand has 175 places, 321 transitions, 4989 flow. Second operand 49 states and 408 transitions. [2024-01-27 15:50:25,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 665 transitions, 11119 flow [2024-01-27 15:50:25,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 665 transitions, 10214 flow, removed 421 selfloop flow, removed 9 redundant places. [2024-01-27 15:50:25,964 INFO L231 Difference]: Finished difference. Result has 245 places, 513 transitions, 9021 flow [2024-01-27 15:50:25,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=9021, PETRI_PLACES=245, PETRI_TRANSITIONS=513} [2024-01-27 15:50:25,965 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 221 predicate places. [2024-01-27 15:50:25,965 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 513 transitions, 9021 flow [2024-01-27 15:50:25,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 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 15:50:25,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:25,965 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 15:50:25,979 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 15:50:26,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:26,171 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 15:50:26,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:26,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1138138541, now seen corresponding path program 7 times [2024-01-27 15:50:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:26,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871899264] [2024-01-27 15:50:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:26,327 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 15:50:26,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:26,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871899264] [2024-01-27 15:50:26,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871899264] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:26,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964009302] [2024-01-27 15:50:26,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:50:26,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:26,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:26,329 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 15:50:26,352 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 15:50:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:26,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:50:26,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:26,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:26,613 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 15:50:26,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964009302] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:26,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:26,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-01-27 15:50:26,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242681776] [2024-01-27 15:50:26,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:26,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:50:26,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:50:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:50:26,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:26,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 513 transitions, 9021 flow. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:26,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:26,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:26,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:28,599 INFO L124 PetriNetUnfolderBase]: 3538/5980 cut-off events. [2024-01-27 15:50:28,599 INFO L125 PetriNetUnfolderBase]: For 185890/185890 co-relation queries the response was YES. [2024-01-27 15:50:28,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53950 conditions, 5980 events. 3538/5980 cut-off events. For 185890/185890 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 35882 event pairs, 53 based on Foata normal form. 106/6086 useless extension candidates. Maximal degree in co-relation 53400. Up to 1174 conditions per place. [2024-01-27 15:50:28,673 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 346 selfloop transitions, 715 changer transitions 7/1069 dead transitions. [2024-01-27 15:50:28,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 1069 transitions, 20688 flow [2024-01-27 15:50:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-27 15:50:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-27 15:50:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 383 transitions. [2024-01-27 15:50:28,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784584980237154 [2024-01-27 15:50:28,675 INFO L175 Difference]: Start difference. First operand has 245 places, 513 transitions, 9021 flow. Second operand 46 states and 383 transitions. [2024-01-27 15:50:28,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 1069 transitions, 20688 flow [2024-01-27 15:50:29,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1069 transitions, 19734 flow, removed 392 selfloop flow, removed 14 redundant places. [2024-01-27 15:50:29,690 INFO L231 Difference]: Finished difference. Result has 296 places, 865 transitions, 17348 flow [2024-01-27 15:50:29,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8468, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=17348, PETRI_PLACES=296, PETRI_TRANSITIONS=865} [2024-01-27 15:50:29,691 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 272 predicate places. [2024-01-27 15:50:29,692 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 865 transitions, 17348 flow [2024-01-27 15:50:29,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:29,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:29,692 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 15:50:29,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-27 15:50:29,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:29,903 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 15:50:29,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash 498992649, now seen corresponding path program 8 times [2024-01-27 15:50:29,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:29,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86950850] [2024-01-27 15:50:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:29,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:30,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:30,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86950850] [2024-01-27 15:50:30,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86950850] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:30,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639945626] [2024-01-27 15:50:30,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:50:30,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:30,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:30,032 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 15:50:30,033 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 15:50:30,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:30,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:30,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:50:30,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:30,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:30,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639945626] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:30,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:30,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-27 15:50:30,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358082226] [2024-01-27 15:50:30,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:30,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:50:30,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:50:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:50:30,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:30,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 865 transitions, 17348 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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 15:50:30,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:30,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:30,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:32,718 INFO L124 PetriNetUnfolderBase]: 4011/6735 cut-off events. [2024-01-27 15:50:32,719 INFO L125 PetriNetUnfolderBase]: For 278548/278548 co-relation queries the response was YES. [2024-01-27 15:50:32,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67841 conditions, 6735 events. 4011/6735 cut-off events. For 278548/278548 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 41112 event pairs, 166 based on Foata normal form. 16/6751 useless extension candidates. Maximal degree in co-relation 66148. Up to 1756 conditions per place. [2024-01-27 15:50:32,787 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 500 selfloop transitions, 623 changer transitions 6/1130 dead transitions. [2024-01-27 15:50:32,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1130 transitions, 24886 flow [2024-01-27 15:50:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:50:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:50:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 281 transitions. [2024-01-27 15:50:32,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36493506493506495 [2024-01-27 15:50:32,789 INFO L175 Difference]: Start difference. First operand has 296 places, 865 transitions, 17348 flow. Second operand 35 states and 281 transitions. [2024-01-27 15:50:32,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1130 transitions, 24886 flow [2024-01-27 15:50:34,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1130 transitions, 24234 flow, removed 298 selfloop flow, removed 11 redundant places. [2024-01-27 15:50:34,487 INFO L231 Difference]: Finished difference. Result has 333 places, 984 transitions, 21093 flow [2024-01-27 15:50:34,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=16924, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=21093, PETRI_PLACES=333, PETRI_TRANSITIONS=984} [2024-01-27 15:50:34,488 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 309 predicate places. [2024-01-27 15:50:34,488 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 984 transitions, 21093 flow [2024-01-27 15:50:34,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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 15:50:34,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:34,488 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 15:50:34,499 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 15:50:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:34,689 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 15:50:34,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -70372241, now seen corresponding path program 9 times [2024-01-27 15:50:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:34,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119100095] [2024-01-27 15:50:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:34,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:34,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119100095] [2024-01-27 15:50:34,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119100095] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:34,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982153878] [2024-01-27 15:50:34,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:34,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:34,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:34,763 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 15:50:34,780 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 15:50:34,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:50:34,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:34,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:50:34,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:34,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:34,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982153878] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:34,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:34,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-27 15:50:34,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031759803] [2024-01-27 15:50:34,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:34,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:50:34,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:34,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:50:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:50:35,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:35,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 984 transitions, 21093 flow. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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 15:50:35,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:35,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:35,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:38,139 INFO L124 PetriNetUnfolderBase]: 4480/7561 cut-off events. [2024-01-27 15:50:38,140 INFO L125 PetriNetUnfolderBase]: For 367164/367164 co-relation queries the response was YES. [2024-01-27 15:50:38,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80621 conditions, 7561 events. 4480/7561 cut-off events. For 367164/367164 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 47469 event pairs, 127 based on Foata normal form. 108/7669 useless extension candidates. Maximal degree in co-relation 79500. Up to 1434 conditions per place. [2024-01-27 15:50:38,220 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 312 selfloop transitions, 999 changer transitions 3/1315 dead transitions. [2024-01-27 15:50:38,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1315 transitions, 30411 flow [2024-01-27 15:50:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-27 15:50:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-27 15:50:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 382 transitions. [2024-01-27 15:50:38,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774703557312253 [2024-01-27 15:50:38,222 INFO L175 Difference]: Start difference. First operand has 333 places, 984 transitions, 21093 flow. Second operand 46 states and 382 transitions. [2024-01-27 15:50:38,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1315 transitions, 30411 flow [2024-01-27 15:50:40,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1315 transitions, 29978 flow, removed 175 selfloop flow, removed 11 redundant places. [2024-01-27 15:50:40,581 INFO L231 Difference]: Finished difference. Result has 383 places, 1173 transitions, 28846 flow [2024-01-27 15:50:40,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=20642, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=824, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=28846, PETRI_PLACES=383, PETRI_TRANSITIONS=1173} [2024-01-27 15:50:40,582 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 359 predicate places. [2024-01-27 15:50:40,582 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 1173 transitions, 28846 flow [2024-01-27 15:50:40,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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 15:50:40,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:40,583 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 15:50:40,598 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 15:50:40,789 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,SelfDestructingSolverStorable10 [2024-01-27 15:50:40,789 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 15:50:40,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:40,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1005338915, now seen corresponding path program 10 times [2024-01-27 15:50:40,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:40,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779182943] [2024-01-27 15:50:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:40,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:40,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779182943] [2024-01-27 15:50:40,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779182943] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022718210] [2024-01-27 15:50:40,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:50:40,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:40,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:40,884 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 15:50:40,910 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 15:50:40,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:50:40,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:40,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:50:40,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:41,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022718210] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:41,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:41,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2024-01-27 15:50:41,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523433307] [2024-01-27 15:50:41,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:41,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:50:41,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:41,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:50:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:50:41,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:41,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1173 transitions, 28846 flow. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 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 15:50:41,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:41,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:41,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:44,017 INFO L124 PetriNetUnfolderBase]: 4479/7568 cut-off events. [2024-01-27 15:50:44,020 INFO L125 PetriNetUnfolderBase]: For 455213/455213 co-relation queries the response was YES. [2024-01-27 15:50:44,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88945 conditions, 7568 events. 4479/7568 cut-off events. For 455213/455213 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 47501 event pairs, 250 based on Foata normal form. 18/7586 useless extension candidates. Maximal degree in co-relation 86946. Up to 2008 conditions per place. [2024-01-27 15:50:44,128 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 645 selfloop transitions, 601 changer transitions 4/1251 dead transitions. [2024-01-27 15:50:44,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1251 transitions, 32930 flow [2024-01-27 15:50:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:50:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:50:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 168 transitions. [2024-01-27 15:50:44,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-01-27 15:50:44,129 INFO L175 Difference]: Start difference. First operand has 383 places, 1173 transitions, 28846 flow. Second operand 18 states and 168 transitions. [2024-01-27 15:50:44,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1251 transitions, 32930 flow [2024-01-27 15:50:47,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1251 transitions, 32163 flow, removed 291 selfloop flow, removed 19 redundant places. [2024-01-27 15:50:47,762 INFO L231 Difference]: Finished difference. Result has 382 places, 1178 transitions, 29974 flow [2024-01-27 15:50:47,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=27970, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=29974, PETRI_PLACES=382, PETRI_TRANSITIONS=1178} [2024-01-27 15:50:47,764 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 358 predicate places. [2024-01-27 15:50:47,764 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 1178 transitions, 29974 flow [2024-01-27 15:50:47,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 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 15:50:47,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:47,764 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 15:50:47,774 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 15:50:47,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:47,968 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 15:50:47,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:47,969 INFO L85 PathProgramCache]: Analyzing trace with hash -406220633, now seen corresponding path program 11 times [2024-01-27 15:50:47,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:47,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763027543] [2024-01-27 15:50:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:47,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:48,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763027543] [2024-01-27 15:50:48,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763027543] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297836189] [2024-01-27 15:50:48,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:50:48,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:48,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:48,059 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 15:50:48,080 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 15:50:48,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:50:48,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:48,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:50:48,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:48,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:48,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297836189] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:48,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:48,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-27 15:50:48,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19514636] [2024-01-27 15:50:48,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:48,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:50:48,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:48,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:50:48,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:50:48,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:48,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1178 transitions, 29974 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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 15:50:48,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:48,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:48,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:51,449 INFO L124 PetriNetUnfolderBase]: 4697/7888 cut-off events. [2024-01-27 15:50:51,449 INFO L125 PetriNetUnfolderBase]: For 445628/445628 co-relation queries the response was YES. [2024-01-27 15:50:51,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93628 conditions, 7888 events. 4697/7888 cut-off events. For 445628/445628 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49657 event pairs, 198 based on Foata normal form. 10/7898 useless extension candidates. Maximal degree in co-relation 92116. Up to 2045 conditions per place. [2024-01-27 15:50:51,539 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 695 selfloop transitions, 628 changer transitions 4/1328 dead transitions. [2024-01-27 15:50:51,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1328 transitions, 35979 flow [2024-01-27 15:50:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:50:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:50:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 166 transitions. [2024-01-27 15:50:51,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39712918660287083 [2024-01-27 15:50:51,541 INFO L175 Difference]: Start difference. First operand has 382 places, 1178 transitions, 29974 flow. Second operand 19 states and 166 transitions. [2024-01-27 15:50:51,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1328 transitions, 35979 flow [2024-01-27 15:50:55,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1328 transitions, 34646 flow, removed 76 selfloop flow, removed 18 redundant places. [2024-01-27 15:50:55,390 INFO L231 Difference]: Finished difference. Result has 386 places, 1220 transitions, 31622 flow [2024-01-27 15:50:55,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=28788, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=31622, PETRI_PLACES=386, PETRI_TRANSITIONS=1220} [2024-01-27 15:50:55,391 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 362 predicate places. [2024-01-27 15:50:55,391 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1220 transitions, 31622 flow [2024-01-27 15:50:55,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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 15:50:55,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:55,392 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 15:50:55,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:55,592 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,SelfDestructingSolverStorable12 [2024-01-27 15:50:55,592 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 15:50:55,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:55,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1966088025, now seen corresponding path program 12 times [2024-01-27 15:50:55,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:55,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268547387] [2024-01-27 15:50:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:55,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:55,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:55,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268547387] [2024-01-27 15:50:55,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268547387] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:55,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868024225] [2024-01-27 15:50:55,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:50:55,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:55,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:55,711 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 15:50:55,736 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 15:50:55,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:50:55,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:55,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:50:55,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:55,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:55,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868024225] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:55,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:55,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-01-27 15:50:55,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463693208] [2024-01-27 15:50:55,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:55,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:50:55,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:55,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:50:55,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:50:55,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:50:55,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1220 transitions, 31622 flow. Second operand has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 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 15:50:55,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:55,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:50:55,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:59,672 INFO L124 PetriNetUnfolderBase]: 5163/8721 cut-off events. [2024-01-27 15:50:59,673 INFO L125 PetriNetUnfolderBase]: For 465984/465984 co-relation queries the response was YES. [2024-01-27 15:50:59,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103170 conditions, 8721 events. 5163/8721 cut-off events. For 465984/465984 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 56527 event pairs, 68 based on Foata normal form. 136/8857 useless extension candidates. Maximal degree in co-relation 101120. Up to 4073 conditions per place. [2024-01-27 15:50:59,775 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 768 selfloop transitions, 735 changer transitions 3/1507 dead transitions. [2024-01-27 15:50:59,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1507 transitions, 40972 flow [2024-01-27 15:50:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:50:59,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:50:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 242 transitions. [2024-01-27 15:50:59,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-01-27 15:50:59,776 INFO L175 Difference]: Start difference. First operand has 386 places, 1220 transitions, 31622 flow. Second operand 26 states and 242 transitions. [2024-01-27 15:50:59,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1507 transitions, 40972 flow [2024-01-27 15:51:04,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1507 transitions, 40513 flow, removed 58 selfloop flow, removed 11 redundant places. [2024-01-27 15:51:04,585 INFO L231 Difference]: Finished difference. Result has 411 places, 1322 transitions, 36957 flow [2024-01-27 15:51:04,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=31206, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=641, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=36957, PETRI_PLACES=411, PETRI_TRANSITIONS=1322} [2024-01-27 15:51:04,587 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 387 predicate places. [2024-01-27 15:51:04,587 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 1322 transitions, 36957 flow [2024-01-27 15:51:04,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 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 15:51:04,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:04,587 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 15:51:04,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:04,788 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,SelfDestructingSolverStorable13 [2024-01-27 15:51:04,788 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 15:51:04,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1202308953, now seen corresponding path program 13 times [2024-01-27 15:51:04,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:04,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305120294] [2024-01-27 15:51:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:04,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:04,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:04,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305120294] [2024-01-27 15:51:04,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305120294] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:04,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896971912] [2024-01-27 15:51:04,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:51:04,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:04,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:04,861 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 15:51:04,871 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 15:51:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:04,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:51:04,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:04,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:05,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896971912] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:05,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:05,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-27 15:51:05,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100512854] [2024-01-27 15:51:05,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:05,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:51:05,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:51:05,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:51:05,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:51:05,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 1322 transitions, 36957 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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 15:51:05,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:05,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:51:05,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:09,215 INFO L124 PetriNetUnfolderBase]: 5501/9239 cut-off events. [2024-01-27 15:51:09,215 INFO L125 PetriNetUnfolderBase]: For 627871/627871 co-relation queries the response was YES. [2024-01-27 15:51:09,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118323 conditions, 9239 events. 5501/9239 cut-off events. For 627871/627871 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 60344 event pairs, 278 based on Foata normal form. 28/9267 useless extension candidates. Maximal degree in co-relation 117140. Up to 7271 conditions per place. [2024-01-27 15:51:09,338 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1279 selfloop transitions, 223 changer transitions 4/1507 dead transitions. [2024-01-27 15:51:09,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1507 transitions, 44690 flow [2024-01-27 15:51:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:51:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:51:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 175 transitions. [2024-01-27 15:51:09,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-01-27 15:51:09,339 INFO L175 Difference]: Start difference. First operand has 411 places, 1322 transitions, 36957 flow. Second operand 20 states and 175 transitions. [2024-01-27 15:51:09,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1507 transitions, 44690 flow [2024-01-27 15:51:14,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1507 transitions, 44060 flow, removed 287 selfloop flow, removed 6 redundant places. [2024-01-27 15:51:14,761 INFO L231 Difference]: Finished difference. Result has 432 places, 1387 transitions, 39002 flow [2024-01-27 15:51:14,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=36485, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=39002, PETRI_PLACES=432, PETRI_TRANSITIONS=1387} [2024-01-27 15:51:14,763 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 408 predicate places. [2024-01-27 15:51:14,763 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1387 transitions, 39002 flow [2024-01-27 15:51:14,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 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 15:51:14,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:14,763 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 15:51:14,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-27 15:51:15,009 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,SelfDestructingSolverStorable14 [2024-01-27 15:51:15,009 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 15:51:15,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash 189835593, now seen corresponding path program 14 times [2024-01-27 15:51:15,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:15,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34422694] [2024-01-27 15:51:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:15,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:15,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:15,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34422694] [2024-01-27 15:51:15,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34422694] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:15,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25897961] [2024-01-27 15:51:15,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:51:15,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:15,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:15,086 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 15:51:15,087 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 15:51:15,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:51:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:15,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:51:15,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:15,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:15,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25897961] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:15,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:15,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-01-27 15:51:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557076437] [2024-01-27 15:51:15,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:51:15,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:51:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:51:15,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:51:15,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1387 transitions, 39002 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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 15:51:15,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:15,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:51:15,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:19,432 INFO L124 PetriNetUnfolderBase]: 5610/9389 cut-off events. [2024-01-27 15:51:19,432 INFO L125 PetriNetUnfolderBase]: For 671593/671593 co-relation queries the response was YES. [2024-01-27 15:51:19,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122077 conditions, 9389 events. 5610/9389 cut-off events. For 671593/671593 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 60815 event pairs, 312 based on Foata normal form. 8/9397 useless extension candidates. Maximal degree in co-relation 121874. Up to 7987 conditions per place. [2024-01-27 15:51:19,555 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1321 selfloop transitions, 170 changer transitions 2/1494 dead transitions. [2024-01-27 15:51:19,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1494 transitions, 44910 flow [2024-01-27 15:51:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:51:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:51:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 133 transitions. [2024-01-27 15:51:19,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2024-01-27 15:51:19,557 INFO L175 Difference]: Start difference. First operand has 432 places, 1387 transitions, 39002 flow. Second operand 15 states and 133 transitions. [2024-01-27 15:51:19,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1494 transitions, 44910 flow [2024-01-27 15:51:25,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1494 transitions, 44511 flow, removed 146 selfloop flow, removed 8 redundant places. [2024-01-27 15:51:25,584 INFO L231 Difference]: Finished difference. Result has 442 places, 1425 transitions, 40362 flow [2024-01-27 15:51:25,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=38554, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=40362, PETRI_PLACES=442, PETRI_TRANSITIONS=1425} [2024-01-27 15:51:25,585 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 418 predicate places. [2024-01-27 15:51:25,585 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1425 transitions, 40362 flow [2024-01-27 15:51:25,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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 15:51:25,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:25,585 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 15:51:25,597 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 15:51:25,786 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,SelfDestructingSolverStorable15 [2024-01-27 15:51:25,786 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 15:51:25,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:25,786 INFO L85 PathProgramCache]: Analyzing trace with hash 907756757, now seen corresponding path program 15 times [2024-01-27 15:51:25,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:25,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956227135] [2024-01-27 15:51:25,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:25,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:25,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:25,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956227135] [2024-01-27 15:51:25,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956227135] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:25,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619335150] [2024-01-27 15:51:25,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:51:25,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:25,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:25,866 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 15:51:25,895 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 15:51:25,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:51:25,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:25,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:51:25,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:26,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619335150] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:26,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:26,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-01-27 15:51:26,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978758217] [2024-01-27 15:51:26,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:26,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:51:26,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:51:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:51:26,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:51:26,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1425 transitions, 40362 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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 15:51:26,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:26,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:51:26,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:30,752 INFO L124 PetriNetUnfolderBase]: 5944/9966 cut-off events. [2024-01-27 15:51:30,754 INFO L125 PetriNetUnfolderBase]: For 742260/742260 co-relation queries the response was YES. [2024-01-27 15:51:30,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132033 conditions, 9966 events. 5944/9966 cut-off events. For 742260/742260 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65213 event pairs, 82 based on Foata normal form. 80/10046 useless extension candidates. Maximal degree in co-relation 131062. Up to 4279 conditions per place. [2024-01-27 15:51:30,889 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 780 selfloop transitions, 881 changer transitions 1/1663 dead transitions. [2024-01-27 15:51:30,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1663 transitions, 49381 flow [2024-01-27 15:51:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:51:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:51:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 219 transitions. [2024-01-27 15:51:30,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981818181818182 [2024-01-27 15:51:30,890 INFO L175 Difference]: Start difference. First operand has 442 places, 1425 transitions, 40362 flow. Second operand 25 states and 219 transitions. [2024-01-27 15:51:30,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1663 transitions, 49381 flow [2024-01-27 15:51:37,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1663 transitions, 49056 flow, removed 107 selfloop flow, removed 10 redundant places. [2024-01-27 15:51:37,921 INFO L231 Difference]: Finished difference. Result has 462 places, 1499 transitions, 45759 flow [2024-01-27 15:51:37,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=39973, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=45759, PETRI_PLACES=462, PETRI_TRANSITIONS=1499} [2024-01-27 15:51:37,923 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 438 predicate places. [2024-01-27 15:51:37,923 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1499 transitions, 45759 flow [2024-01-27 15:51:37,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 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 15:51:37,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:37,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:37,936 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 15:51:38,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:38,124 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 15:51:38,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2125386687, now seen corresponding path program 16 times [2024-01-27 15:51:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:38,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370553575] [2024-01-27 15:51:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:38,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:38,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370553575] [2024-01-27 15:51:38,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370553575] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:38,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991509844] [2024-01-27 15:51:38,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:51:38,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:38,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:38,194 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 15:51:38,194 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 15:51:38,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:51:38,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:38,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:51:38,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:38,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:38,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991509844] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:38,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:38,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 11 [2024-01-27 15:51:38,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453907767] [2024-01-27 15:51:38,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:38,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:51:38,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:38,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:51:38,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:51:38,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-01-27 15:51:38,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1499 transitions, 45759 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 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 15:51:38,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:38,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-01-27 15:51:38,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:47,548 INFO L124 PetriNetUnfolderBase]: 11151/19278 cut-off events. [2024-01-27 15:51:47,549 INFO L125 PetriNetUnfolderBase]: For 1661116/1661610 co-relation queries the response was YES. [2024-01-27 15:51:47,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276397 conditions, 19278 events. 11151/19278 cut-off events. For 1661116/1661610 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 147624 event pairs, 329 based on Foata normal form. 46/19183 useless extension candidates. Maximal degree in co-relation 274280. Up to 5338 conditions per place. [2024-01-27 15:51:48,053 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 1461 selfloop transitions, 1633 changer transitions 373/3535 dead transitions. [2024-01-27 15:51:48,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 3535 transitions, 116594 flow [2024-01-27 15:51:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:51:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:51:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-01-27 15:51:48,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2024-01-27 15:51:48,055 INFO L175 Difference]: Start difference. First operand has 462 places, 1499 transitions, 45759 flow. Second operand 9 states and 127 transitions. [2024-01-27 15:51:48,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 3535 transitions, 116594 flow [2024-01-27 15:52:14,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 3535 transitions, 115809 flow, removed 237 selfloop flow, removed 16 redundant places. [2024-01-27 15:52:14,757 INFO L231 Difference]: Finished difference. Result has 459 places, 2552 transitions, 87666 flow [2024-01-27 15:52:14,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=45386, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=767, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=87666, PETRI_PLACES=459, PETRI_TRANSITIONS=2552} [2024-01-27 15:52:14,759 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 435 predicate places. [2024-01-27 15:52:14,759 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 2552 transitions, 87666 flow [2024-01-27 15:52:14,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 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 15:52:14,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:14,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:14,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-27 15:52:14,959 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,SelfDestructingSolverStorable17 [2024-01-27 15:52:14,959 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 15:52:14,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:14,960 INFO L85 PathProgramCache]: Analyzing trace with hash -578495319, now seen corresponding path program 17 times [2024-01-27 15:52:14,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:14,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204920510] [2024-01-27 15:52:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:14,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:15,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:15,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204920510] [2024-01-27 15:52:15,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204920510] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:15,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316629041] [2024-01-27 15:52:15,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:52:15,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:15,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:15,061 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 15:52:15,062 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 15:52:15,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-27 15:52:15,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:15,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:52:15,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:15,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:15,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316629041] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:15,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:15,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-01-27 15:52:15,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975395986] [2024-01-27 15:52:15,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:15,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:52:15,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:15,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:52:15,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:52:15,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-01-27 15:52:15,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 2552 transitions, 87666 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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 15:52:15,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:15,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-01-27 15:52:15,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:29,369 INFO L124 PetriNetUnfolderBase]: 12427/20849 cut-off events. [2024-01-27 15:52:29,369 INFO L125 PetriNetUnfolderBase]: For 1868320/1868320 co-relation queries the response was YES. [2024-01-27 15:52:29,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307669 conditions, 20849 events. 12427/20849 cut-off events. For 1868320/1868320 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 153659 event pairs, 377 based on Foata normal form. 94/20943 useless extension candidates. Maximal degree in co-relation 304446. Up to 9296 conditions per place. [2024-01-27 15:52:29,869 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1107 selfloop transitions, 1810 changer transitions 85/3003 dead transitions. [2024-01-27 15:52:29,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 3003 transitions, 105574 flow [2024-01-27 15:52:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:52:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:52:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 178 transitions. [2024-01-27 15:52:29,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47593582887700536 [2024-01-27 15:52:29,870 INFO L175 Difference]: Start difference. First operand has 459 places, 2552 transitions, 87666 flow. Second operand 17 states and 178 transitions. [2024-01-27 15:52:29,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 3003 transitions, 105574 flow