./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.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-difference-det.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 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:38:03,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:38:03,858 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:38:03,861 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:38:03,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:38:03,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:38:03,882 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:38:03,883 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:38:03,883 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:38:03,886 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:38:03,886 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:38:03,887 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:38:03,887 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:38:03,888 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:38:03,888 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:38:03,889 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:38:03,889 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:38:03,889 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:38:03,889 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:38:03,889 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:38:03,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:38:03,890 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:38:03,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:38:03,890 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:38:03,891 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:38:03,891 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:38:03,891 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:38:03,891 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:38:03,892 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:38:03,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:38:03,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:38:03,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:38:03,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:38:03,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:38:03,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:38:03,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:38:03,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:38:03,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:38:03,894 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:38:03,895 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:38:03,895 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:38:03,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:38:03,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:38:03,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 [2024-01-27 15:38:04,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:38:04,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:38:04,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:38:04,177 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:38:04,178 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:38:04,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2024-01-27 15:38:05,598 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:38:05,757 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:38:05,758 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2024-01-27 15:38:05,772 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172eb05bd/15007b8771e541b1ab8c2aeaa022d097/FLAG613306ccc [2024-01-27 15:38:05,783 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/172eb05bd/15007b8771e541b1ab8c2aeaa022d097 [2024-01-27 15:38:05,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:38:05,788 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:38:05,789 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:38:05,789 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:38:05,796 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:38:05,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:05,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3617e037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05, skipping insertion in model container [2024-01-27 15:38:05,798 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:05,824 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:38:05,938 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-difference-det.wvr.c[2559,2572] [2024-01-27 15:38:05,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:38:05,948 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:38:05,963 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-difference-det.wvr.c[2559,2572] [2024-01-27 15:38:05,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:38:05,974 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:38:05,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05 WrapperNode [2024-01-27 15:38:05,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:38:05,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:38:05,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:38:05,976 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:38:05,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:05,987 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,003 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 125 [2024-01-27 15:38:06,004 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:38:06,004 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:38:06,005 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:38:06,005 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:38:06,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,034 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-27 15:38:06,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,042 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,046 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,048 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,060 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,061 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:38:06,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:38:06,064 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:38:06,064 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:38:06,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (1/1) ... [2024-01-27 15:38:06,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:38:06,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:06,134 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 15:38:06,151 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 15:38:06,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:38:06,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:38:06,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:38:06,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:38:06,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:38:06,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:38:06,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:38:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-01-27 15:38:06,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-01-27 15:38:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:38:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:38:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:38:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:38:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:38:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:38:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:38:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:38:06,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:38:06,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:38:06,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:38:06,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:38:06,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:38:06,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:38:06,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:38:06,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:38:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:38:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:38:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:38:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:38:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:38:06,187 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 15:38:06,273 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:38:06,274 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:38:06,450 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:38:06,450 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:38:06,561 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:38:06,562 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:38:06,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:38:06 BoogieIcfgContainer [2024-01-27 15:38:06,562 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:38:06,564 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:38:06,564 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:38:06,566 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:38:06,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:38:05" (1/3) ... [2024-01-27 15:38:06,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c294df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:38:06, skipping insertion in model container [2024-01-27 15:38:06,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:05" (2/3) ... [2024-01-27 15:38:06,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c294df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:38:06, skipping insertion in model container [2024-01-27 15:38:06,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:38:06" (3/3) ... [2024-01-27 15:38:06,568 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2024-01-27 15:38:06,574 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:38:06,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:38:06,581 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:38:06,581 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:38:06,618 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 15:38:06,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 43 transitions, 114 flow [2024-01-27 15:38:06,674 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2024-01-27 15:38:06,676 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:38:06,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 39 events. 4/39 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-01-27 15:38:06,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 43 transitions, 114 flow [2024-01-27 15:38:06,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 38 transitions, 100 flow [2024-01-27 15:38:06,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:38:06,713 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;@c865d3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:38:06,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:38:06,722 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:38:06,725 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2024-01-27 15:38:06,725 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:38:06,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:06,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:06,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:06,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:06,731 INFO L85 PathProgramCache]: Analyzing trace with hash -351203351, now seen corresponding path program 1 times [2024-01-27 15:38:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:06,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514295350] [2024-01-27 15:38:06,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:06,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:07,103 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 15:38:07,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:07,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514295350] [2024-01-27 15:38:07,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514295350] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:07,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:07,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:38:07,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437886914] [2024-01-27 15:38:07,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:07,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:38:07,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:07,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:38:07,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:38:07,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-27 15:38:07,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 15:38:07,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:07,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-27 15:38:07,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:07,622 INFO L124 PetriNetUnfolderBase]: 3661/5016 cut-off events. [2024-01-27 15:38:07,623 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-01-27 15:38:07,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10212 conditions, 5016 events. 3661/5016 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21858 event pairs, 656 based on Foata normal form. 1/5004 useless extension candidates. Maximal degree in co-relation 8256. Up to 3880 conditions per place. [2024-01-27 15:38:07,649 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 53 selfloop transitions, 5 changer transitions 1/64 dead transitions. [2024-01-27 15:38:07,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 291 flow [2024-01-27 15:38:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:38:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:38:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-01-27 15:38:07,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6744186046511628 [2024-01-27 15:38:07,661 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 100 flow. Second operand 3 states and 87 transitions. [2024-01-27 15:38:07,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 291 flow [2024-01-27 15:38:07,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 261 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-27 15:38:07,672 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 117 flow [2024-01-27 15:38:07,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2024-01-27 15:38:07,676 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2024-01-27 15:38:07,677 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 117 flow [2024-01-27 15:38:07,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 15:38:07,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:07,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:07,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:38:07,678 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:07,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash 618723373, now seen corresponding path program 1 times [2024-01-27 15:38:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:07,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075674084] [2024-01-27 15:38:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:07,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:07,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:07,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075674084] [2024-01-27 15:38:07,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075674084] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:07,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:07,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:38:07,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889717513] [2024-01-27 15:38:07,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:07,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:38:07,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:07,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:38:07,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:38:07,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-27 15:38:07,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:07,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:07,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-27 15:38:07,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:08,465 INFO L124 PetriNetUnfolderBase]: 7886/10692 cut-off events. [2024-01-27 15:38:08,466 INFO L125 PetriNetUnfolderBase]: For 1801/1821 co-relation queries the response was YES. [2024-01-27 15:38:08,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24074 conditions, 10692 events. 7886/10692 cut-off events. For 1801/1821 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 54549 event pairs, 2450 based on Foata normal form. 0/10148 useless extension candidates. Maximal degree in co-relation 3833. Up to 5589 conditions per place. [2024-01-27 15:38:08,508 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 93 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2024-01-27 15:38:08,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 107 transitions, 510 flow [2024-01-27 15:38:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-01-27 15:38:08,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-01-27 15:38:08,510 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 117 flow. Second operand 5 states and 130 transitions. [2024-01-27 15:38:08,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 107 transitions, 510 flow [2024-01-27 15:38:08,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 107 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:38:08,513 INFO L231 Difference]: Finished difference. Result has 48 places, 51 transitions, 175 flow [2024-01-27 15:38:08,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=48, PETRI_TRANSITIONS=51} [2024-01-27 15:38:08,514 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2024-01-27 15:38:08,514 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 51 transitions, 175 flow [2024-01-27 15:38:08,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:08,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:08,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:08,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:38:08,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:08,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:08,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1105966541, now seen corresponding path program 2 times [2024-01-27 15:38:08,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:08,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370961037] [2024-01-27 15:38:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:08,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:08,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:08,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370961037] [2024-01-27 15:38:08,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370961037] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:08,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425971003] [2024-01-27 15:38:08,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:38:08,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:08,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:08,589 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 15:38:08,635 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 15:38:08,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:38:08,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:08,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:38:08,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:08,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:08,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425971003] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:08,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:08,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-01-27 15:38:08,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332397779] [2024-01-27 15:38:08,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:08,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:38:08,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:08,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:38:08,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:38:08,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:38:08,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 51 transitions, 175 flow. Second operand has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 9 states have internal predecessors, (101), 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 15:38:08,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:08,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:38:08,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:10,057 INFO L124 PetriNetUnfolderBase]: 14079/18496 cut-off events. [2024-01-27 15:38:10,057 INFO L125 PetriNetUnfolderBase]: For 6346/6346 co-relation queries the response was YES. [2024-01-27 15:38:10,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47735 conditions, 18496 events. 14079/18496 cut-off events. For 6346/6346 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 93581 event pairs, 1143 based on Foata normal form. 300/18794 useless extension candidates. Maximal degree in co-relation 26866. Up to 4047 conditions per place. [2024-01-27 15:38:10,130 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 246 selfloop transitions, 36 changer transitions 0/285 dead transitions. [2024-01-27 15:38:10,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 285 transitions, 1419 flow [2024-01-27 15:38:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:38:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:38:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 352 transitions. [2024-01-27 15:38:10,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-01-27 15:38:10,133 INFO L175 Difference]: Start difference. First operand has 48 places, 51 transitions, 175 flow. Second operand 14 states and 352 transitions. [2024-01-27 15:38:10,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 285 transitions, 1419 flow [2024-01-27 15:38:10,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 285 transitions, 1419 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:38:10,146 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 411 flow [2024-01-27 15:38:10,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=411, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2024-01-27 15:38:10,146 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2024-01-27 15:38:10,147 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 411 flow [2024-01-27 15:38:10,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 9 states have internal predecessors, (101), 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 15:38:10,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:10,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:10,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:10,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:10,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:10,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1759348672, now seen corresponding path program 1 times [2024-01-27 15:38:10,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:10,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751607924] [2024-01-27 15:38:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:10,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:10,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751607924] [2024-01-27 15:38:10,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751607924] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:10,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:10,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:38:10,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397751861] [2024-01-27 15:38:10,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:10,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:38:10,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:10,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:38:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:38:10,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-27 15:38:10,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 411 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 15:38:10,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:10,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-27 15:38:10,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:11,406 INFO L124 PetriNetUnfolderBase]: 8968/12348 cut-off events. [2024-01-27 15:38:11,406 INFO L125 PetriNetUnfolderBase]: For 16575/16671 co-relation queries the response was YES. [2024-01-27 15:38:11,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37708 conditions, 12348 events. 8968/12348 cut-off events. For 16575/16671 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64819 event pairs, 3027 based on Foata normal form. 441/12626 useless extension candidates. Maximal degree in co-relation 32708. Up to 7212 conditions per place. [2024-01-27 15:38:11,461 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 90 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-01-27 15:38:11,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 706 flow [2024-01-27 15:38:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:38:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:38:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-01-27 15:38:11,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6821705426356589 [2024-01-27 15:38:11,463 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 411 flow. Second operand 3 states and 88 transitions. [2024-01-27 15:38:11,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 706 flow [2024-01-27 15:38:11,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 107 transitions, 674 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-01-27 15:38:11,551 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 395 flow [2024-01-27 15:38:11,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=395, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2024-01-27 15:38:11,553 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2024-01-27 15:38:11,553 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 395 flow [2024-01-27 15:38:11,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 15:38:11,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:11,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:11,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:38:11,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:11,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:11,555 INFO L85 PathProgramCache]: Analyzing trace with hash -156174319, now seen corresponding path program 3 times [2024-01-27 15:38:11,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:11,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045610835] [2024-01-27 15:38:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:11,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:11,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:11,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045610835] [2024-01-27 15:38:11,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045610835] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:11,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:11,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:38:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817161289] [2024-01-27 15:38:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:11,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:38:11,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:11,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:38:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:38:11,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-27 15:38:11,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 395 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:11,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:11,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-27 15:38:11,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:12,853 INFO L124 PetriNetUnfolderBase]: 14153/19361 cut-off events. [2024-01-27 15:38:12,854 INFO L125 PetriNetUnfolderBase]: For 23211/23318 co-relation queries the response was YES. [2024-01-27 15:38:12,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58927 conditions, 19361 events. 14153/19361 cut-off events. For 23211/23318 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 105243 event pairs, 4373 based on Foata normal form. 57/19315 useless extension candidates. Maximal degree in co-relation 46122. Up to 9812 conditions per place. [2024-01-27 15:38:13,073 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 115 selfloop transitions, 26 changer transitions 0/152 dead transitions. [2024-01-27 15:38:13,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 152 transitions, 994 flow [2024-01-27 15:38:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:13,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-01-27 15:38:13,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-01-27 15:38:13,075 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 395 flow. Second operand 5 states and 130 transitions. [2024-01-27 15:38:13,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 152 transitions, 994 flow [2024-01-27 15:38:13,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 152 transitions, 985 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:38:13,179 INFO L231 Difference]: Finished difference. Result has 75 places, 94 transitions, 601 flow [2024-01-27 15:38:13,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=601, PETRI_PLACES=75, PETRI_TRANSITIONS=94} [2024-01-27 15:38:13,180 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 28 predicate places. [2024-01-27 15:38:13,180 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 94 transitions, 601 flow [2024-01-27 15:38:13,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:13,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:13,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:13,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:38:13,181 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:13,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash 711082719, now seen corresponding path program 4 times [2024-01-27 15:38:13,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:13,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238311806] [2024-01-27 15:38:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:13,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:13,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238311806] [2024-01-27 15:38:13,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238311806] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:13,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:13,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:38:13,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510284995] [2024-01-27 15:38:13,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:13,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:38:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:13,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:38:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:38:13,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-27 15:38:13,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 94 transitions, 601 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:13,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:13,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-27 15:38:13,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:14,688 INFO L124 PetriNetUnfolderBase]: 14827/20287 cut-off events. [2024-01-27 15:38:14,688 INFO L125 PetriNetUnfolderBase]: For 38844/39050 co-relation queries the response was YES. [2024-01-27 15:38:14,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66690 conditions, 20287 events. 14827/20287 cut-off events. For 38844/39050 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 112229 event pairs, 4146 based on Foata normal form. 84/20268 useless extension candidates. Maximal degree in co-relation 55360. Up to 8546 conditions per place. [2024-01-27 15:38:14,814 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 127 selfloop transitions, 20 changer transitions 0/158 dead transitions. [2024-01-27 15:38:14,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 158 transitions, 1133 flow [2024-01-27 15:38:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-01-27 15:38:14,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-01-27 15:38:14,816 INFO L175 Difference]: Start difference. First operand has 75 places, 94 transitions, 601 flow. Second operand 5 states and 132 transitions. [2024-01-27 15:38:14,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 158 transitions, 1133 flow [2024-01-27 15:38:15,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 158 transitions, 1119 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-01-27 15:38:15,022 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 658 flow [2024-01-27 15:38:15,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=658, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-01-27 15:38:15,023 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 34 predicate places. [2024-01-27 15:38:15,023 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 658 flow [2024-01-27 15:38:15,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:15,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:15,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:15,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:38:15,024 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:15,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1205243889, now seen corresponding path program 1 times [2024-01-27 15:38:15,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:15,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557492502] [2024-01-27 15:38:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:15,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:15,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:15,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557492502] [2024-01-27 15:38:15,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557492502] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:15,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:15,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:38:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794547277] [2024-01-27 15:38:15,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:15,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:38:15,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:15,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:38:15,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:38:15,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-27 15:38:15,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 658 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:15,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:15,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-27 15:38:15,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:16,473 INFO L124 PetriNetUnfolderBase]: 14569/19670 cut-off events. [2024-01-27 15:38:16,480 INFO L125 PetriNetUnfolderBase]: For 39429/39453 co-relation queries the response was YES. [2024-01-27 15:38:16,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65201 conditions, 19670 events. 14569/19670 cut-off events. For 39429/39453 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 105467 event pairs, 4527 based on Foata normal form. 90/19756 useless extension candidates. Maximal degree in co-relation 58863. Up to 9925 conditions per place. [2024-01-27 15:38:16,608 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 129 selfloop transitions, 25 changer transitions 0/160 dead transitions. [2024-01-27 15:38:16,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 160 transitions, 1185 flow [2024-01-27 15:38:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-01-27 15:38:16,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641860465116279 [2024-01-27 15:38:16,627 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 658 flow. Second operand 5 states and 138 transitions. [2024-01-27 15:38:16,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 160 transitions, 1185 flow [2024-01-27 15:38:16,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 160 transitions, 1142 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-27 15:38:16,861 INFO L231 Difference]: Finished difference. Result has 85 places, 98 transitions, 710 flow [2024-01-27 15:38:16,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=710, PETRI_PLACES=85, PETRI_TRANSITIONS=98} [2024-01-27 15:38:16,863 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 38 predicate places. [2024-01-27 15:38:16,863 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 98 transitions, 710 flow [2024-01-27 15:38:16,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:16,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:16,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:16,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:38:16,864 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:16,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1450918319, now seen corresponding path program 2 times [2024-01-27 15:38:16,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:16,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165381052] [2024-01-27 15:38:16,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:16,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:16,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:16,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165381052] [2024-01-27 15:38:16,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165381052] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:16,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690406074] [2024-01-27 15:38:16,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:38:16,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:16,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:16,955 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 15:38:16,993 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 15:38:17,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:38:17,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:17,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:38:17,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:17,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:17,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690406074] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:17,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:17,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-01-27 15:38:17,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662904683] [2024-01-27 15:38:17,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:17,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:38:17,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:38:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:38:17,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:38:17,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 710 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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 15:38:17,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:17,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:38:17,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:18,789 INFO L124 PetriNetUnfolderBase]: 18703/24860 cut-off events. [2024-01-27 15:38:18,790 INFO L125 PetriNetUnfolderBase]: For 52037/52037 co-relation queries the response was YES. [2024-01-27 15:38:18,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83891 conditions, 24860 events. 18703/24860 cut-off events. For 52037/52037 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 130579 event pairs, 1321 based on Foata normal form. 192/25051 useless extension candidates. Maximal degree in co-relation 72064. Up to 4911 conditions per place. [2024-01-27 15:38:19,077 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 256 selfloop transitions, 77 changer transitions 0/336 dead transitions. [2024-01-27 15:38:19,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 336 transitions, 2369 flow [2024-01-27 15:38:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:38:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:38:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 340 transitions. [2024-01-27 15:38:19,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5647840531561462 [2024-01-27 15:38:19,079 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 710 flow. Second operand 14 states and 340 transitions. [2024-01-27 15:38:19,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 336 transitions, 2369 flow [2024-01-27 15:38:19,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 336 transitions, 2306 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-27 15:38:19,538 INFO L231 Difference]: Finished difference. Result has 103 places, 139 transitions, 1264 flow [2024-01-27 15:38:19,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1264, PETRI_PLACES=103, PETRI_TRANSITIONS=139} [2024-01-27 15:38:19,540 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 56 predicate places. [2024-01-27 15:38:19,540 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 139 transitions, 1264 flow [2024-01-27 15:38:19,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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 15:38:19,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:19,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:19,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:19,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-01-27 15:38:19,745 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:19,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash 623028822, now seen corresponding path program 1 times [2024-01-27 15:38:19,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:19,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650420359] [2024-01-27 15:38:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:19,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:19,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:19,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650420359] [2024-01-27 15:38:19,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650420359] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:19,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:19,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:38:19,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189126435] [2024-01-27 15:38:19,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:19,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:38:19,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:38:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:38:19,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-27 15:38:19,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 139 transitions, 1264 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 15:38:19,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:19,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-27 15:38:19,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:21,011 INFO L124 PetriNetUnfolderBase]: 11897/16590 cut-off events. [2024-01-27 15:38:21,011 INFO L125 PetriNetUnfolderBase]: For 57815/58280 co-relation queries the response was YES. [2024-01-27 15:38:21,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63441 conditions, 16590 events. 11897/16590 cut-off events. For 57815/58280 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 92293 event pairs, 3063 based on Foata normal form. 483/16955 useless extension candidates. Maximal degree in co-relation 59173. Up to 10014 conditions per place. [2024-01-27 15:38:21,108 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 125 selfloop transitions, 3 changer transitions 9/169 dead transitions. [2024-01-27 15:38:21,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 169 transitions, 1722 flow [2024-01-27 15:38:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:38:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:38:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-01-27 15:38:21,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-01-27 15:38:21,109 INFO L175 Difference]: Start difference. First operand has 103 places, 139 transitions, 1264 flow. Second operand 3 states and 84 transitions. [2024-01-27 15:38:21,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 169 transitions, 1722 flow [2024-01-27 15:38:21,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 169 transitions, 1652 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-01-27 15:38:21,627 INFO L231 Difference]: Finished difference. Result has 106 places, 131 transitions, 1108 flow [2024-01-27 15:38:21,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1108, PETRI_PLACES=106, PETRI_TRANSITIONS=131} [2024-01-27 15:38:21,628 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 59 predicate places. [2024-01-27 15:38:21,628 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 131 transitions, 1108 flow [2024-01-27 15:38:21,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 15:38:21,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:21,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:21,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:38:21,629 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:21,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:21,629 INFO L85 PathProgramCache]: Analyzing trace with hash 611069053, now seen corresponding path program 5 times [2024-01-27 15:38:21,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:21,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480319721] [2024-01-27 15:38:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:21,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:21,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:21,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480319721] [2024-01-27 15:38:21,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480319721] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:21,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467376885] [2024-01-27 15:38:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:38:21,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:21,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:21,684 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 15:38:21,713 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 15:38:21,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:38:21,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:21,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:38:21,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:21,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:21,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467376885] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:21,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:21,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-01-27 15:38:21,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398070553] [2024-01-27 15:38:21,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:21,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:38:21,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:21,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:38:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:38:21,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:38:21,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 131 transitions, 1108 flow. Second operand has 11 states, 11 states have (on average 12.0) internal successors, (132), 11 states have internal predecessors, (132), 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 15:38:21,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:21,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:38:21,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:23,850 INFO L124 PetriNetUnfolderBase]: 18926/25234 cut-off events. [2024-01-27 15:38:23,850 INFO L125 PetriNetUnfolderBase]: For 59636/59636 co-relation queries the response was YES. [2024-01-27 15:38:23,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94004 conditions, 25234 events. 18926/25234 cut-off events. For 59636/59636 co-relation queries the response was YES. Maximal size of possible extension queue 963. Compared 132267 event pairs, 1631 based on Foata normal form. 268/25501 useless extension candidates. Maximal degree in co-relation 88628. Up to 4728 conditions per place. [2024-01-27 15:38:24,001 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 263 selfloop transitions, 85 changer transitions 0/351 dead transitions. [2024-01-27 15:38:24,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 351 transitions, 2712 flow [2024-01-27 15:38:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:38:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:38:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 368 transitions. [2024-01-27 15:38:24,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705426356589147 [2024-01-27 15:38:24,003 INFO L175 Difference]: Start difference. First operand has 106 places, 131 transitions, 1108 flow. Second operand 15 states and 368 transitions. [2024-01-27 15:38:24,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 351 transitions, 2712 flow [2024-01-27 15:38:24,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 351 transitions, 2647 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-01-27 15:38:24,704 INFO L231 Difference]: Finished difference. Result has 118 places, 153 transitions, 1548 flow [2024-01-27 15:38:24,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1548, PETRI_PLACES=118, PETRI_TRANSITIONS=153} [2024-01-27 15:38:24,705 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 71 predicate places. [2024-01-27 15:38:24,706 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 153 transitions, 1548 flow [2024-01-27 15:38:24,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.0) internal successors, (132), 11 states have internal predecessors, (132), 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 15:38:24,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:24,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:24,730 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 15:38:24,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:24,918 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:24,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash 530308319, now seen corresponding path program 3 times [2024-01-27 15:38:24,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488192567] [2024-01-27 15:38:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:25,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:25,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488192567] [2024-01-27 15:38:25,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488192567] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:25,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:25,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:25,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129440284] [2024-01-27 15:38:25,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:25,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:38:25,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:25,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:38:25,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:38:25,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:38:25,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 153 transitions, 1548 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 15:38:25,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:25,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:38:25,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:27,062 INFO L124 PetriNetUnfolderBase]: 19294/25832 cut-off events. [2024-01-27 15:38:27,063 INFO L125 PetriNetUnfolderBase]: For 93742/93742 co-relation queries the response was YES. [2024-01-27 15:38:27,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102801 conditions, 25832 events. 19294/25832 cut-off events. For 93742/93742 co-relation queries the response was YES. Maximal size of possible extension queue 1005. Compared 137831 event pairs, 8011 based on Foata normal form. 120/25939 useless extension candidates. Maximal degree in co-relation 99718. Up to 18158 conditions per place. [2024-01-27 15:38:27,215 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 173 selfloop transitions, 42 changer transitions 0/218 dead transitions. [2024-01-27 15:38:27,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 218 transitions, 2239 flow [2024-01-27 15:38:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:38:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:38:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-01-27 15:38:27,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-01-27 15:38:27,216 INFO L175 Difference]: Start difference. First operand has 118 places, 153 transitions, 1548 flow. Second operand 6 states and 148 transitions. [2024-01-27 15:38:27,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 218 transitions, 2239 flow [2024-01-27 15:38:28,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 218 transitions, 2189 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-27 15:38:28,085 INFO L231 Difference]: Finished difference. Result has 122 places, 157 transitions, 1643 flow [2024-01-27 15:38:28,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1643, PETRI_PLACES=122, PETRI_TRANSITIONS=157} [2024-01-27 15:38:28,086 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 75 predicate places. [2024-01-27 15:38:28,086 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 157 transitions, 1643 flow [2024-01-27 15:38:28,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 15:38:28,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:28,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:28,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-27 15:38:28,087 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:28,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:28,087 INFO L85 PathProgramCache]: Analyzing trace with hash 367430581, now seen corresponding path program 4 times [2024-01-27 15:38:28,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:28,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217372777] [2024-01-27 15:38:28,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:28,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:28,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:28,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217372777] [2024-01-27 15:38:28,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217372777] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:28,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:28,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:38:28,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184647859] [2024-01-27 15:38:28,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:28,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:38:28,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:28,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:38:28,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:38:28,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-27 15:38:28,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 157 transitions, 1643 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:28,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:28,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-27 15:38:28,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:30,182 INFO L124 PetriNetUnfolderBase]: 18119/24563 cut-off events. [2024-01-27 15:38:30,182 INFO L125 PetriNetUnfolderBase]: For 97255/97275 co-relation queries the response was YES. [2024-01-27 15:38:30,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99456 conditions, 24563 events. 18119/24563 cut-off events. For 97255/97275 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 135101 event pairs, 7456 based on Foata normal form. 68/24570 useless extension candidates. Maximal degree in co-relation 93543. Up to 17055 conditions per place. [2024-01-27 15:38:30,349 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 137 selfloop transitions, 30 changer transitions 13/204 dead transitions. [2024-01-27 15:38:30,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 204 transitions, 2177 flow [2024-01-27 15:38:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-01-27 15:38:30,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906976744186047 [2024-01-27 15:38:30,350 INFO L175 Difference]: Start difference. First operand has 122 places, 157 transitions, 1643 flow. Second operand 5 states and 127 transitions. [2024-01-27 15:38:30,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 204 transitions, 2177 flow [2024-01-27 15:38:31,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 204 transitions, 2122 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-27 15:38:31,402 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1643 flow [2024-01-27 15:38:31,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1643, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2024-01-27 15:38:31,403 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 77 predicate places. [2024-01-27 15:38:31,403 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1643 flow [2024-01-27 15:38:31,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:31,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:31,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:31,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:38:31,403 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:31,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:31,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1792852717, now seen corresponding path program 5 times [2024-01-27 15:38:31,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:31,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520219758] [2024-01-27 15:38:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:31,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:31,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:31,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520219758] [2024-01-27 15:38:31,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520219758] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:31,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:31,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:31,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060606872] [2024-01-27 15:38:31,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:31,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:38:31,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:31,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:38:31,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:38:31,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:38:31,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1643 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 15:38:31,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:31,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:38:31,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:33,622 INFO L124 PetriNetUnfolderBase]: 20753/27745 cut-off events. [2024-01-27 15:38:33,622 INFO L125 PetriNetUnfolderBase]: For 107158/107158 co-relation queries the response was YES. [2024-01-27 15:38:33,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110460 conditions, 27745 events. 20753/27745 cut-off events. For 107158/107158 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 147971 event pairs, 5659 based on Foata normal form. 230/27973 useless extension candidates. Maximal degree in co-relation 106810. Up to 11718 conditions per place. [2024-01-27 15:38:33,808 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 174 selfloop transitions, 46 changer transitions 1/224 dead transitions. [2024-01-27 15:38:33,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 224 transitions, 2385 flow [2024-01-27 15:38:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:38:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:38:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-01-27 15:38:33,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-01-27 15:38:33,810 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1643 flow. Second operand 6 states and 153 transitions. [2024-01-27 15:38:33,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 224 transitions, 2385 flow [2024-01-27 15:38:35,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 224 transitions, 2305 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-01-27 15:38:35,141 INFO L231 Difference]: Finished difference. Result has 124 places, 158 transitions, 1706 flow [2024-01-27 15:38:35,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1706, PETRI_PLACES=124, PETRI_TRANSITIONS=158} [2024-01-27 15:38:35,142 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 77 predicate places. [2024-01-27 15:38:35,142 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 158 transitions, 1706 flow [2024-01-27 15:38:35,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 15:38:35,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:35,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:35,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 15:38:35,143 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:35,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1391058349, now seen corresponding path program 6 times [2024-01-27 15:38:35,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:35,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997447784] [2024-01-27 15:38:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:35,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:35,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:35,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997447784] [2024-01-27 15:38:35,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997447784] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:35,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:35,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497755087] [2024-01-27 15:38:35,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:35,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:38:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:38:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:38:35,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:38:35,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 158 transitions, 1706 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 15:38:35,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:35,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:38:35,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:37,210 INFO L124 PetriNetUnfolderBase]: 20192/26976 cut-off events. [2024-01-27 15:38:37,210 INFO L125 PetriNetUnfolderBase]: For 107335/107335 co-relation queries the response was YES. [2024-01-27 15:38:37,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107742 conditions, 26976 events. 20192/26976 cut-off events. For 107335/107335 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 143844 event pairs, 5910 based on Foata normal form. 158/27132 useless extension candidates. Maximal degree in co-relation 104726. Up to 13657 conditions per place. [2024-01-27 15:38:37,378 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 163 selfloop transitions, 50 changer transitions 1/217 dead transitions. [2024-01-27 15:38:37,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 217 transitions, 2336 flow [2024-01-27 15:38:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:38:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:38:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-01-27 15:38:37,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-01-27 15:38:37,381 INFO L175 Difference]: Start difference. First operand has 124 places, 158 transitions, 1706 flow. Second operand 6 states and 148 transitions. [2024-01-27 15:38:37,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 217 transitions, 2336 flow [2024-01-27 15:38:38,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 217 transitions, 2211 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-01-27 15:38:38,533 INFO L231 Difference]: Finished difference. Result has 122 places, 156 transitions, 1644 flow [2024-01-27 15:38:38,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1644, PETRI_PLACES=122, PETRI_TRANSITIONS=156} [2024-01-27 15:38:38,535 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 75 predicate places. [2024-01-27 15:38:38,535 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 156 transitions, 1644 flow [2024-01-27 15:38:38,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 15:38:38,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:38,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:38,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-27 15:38:38,536 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:38,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:38,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1634101919, now seen corresponding path program 6 times [2024-01-27 15:38:38,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:38,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046111593] [2024-01-27 15:38:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:38,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:38,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:38,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046111593] [2024-01-27 15:38:38,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046111593] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:38,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:38,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:38:38,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758037125] [2024-01-27 15:38:38,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:38,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:38:38,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:38,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:38:38,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:38:38,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-27 15:38:38,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 156 transitions, 1644 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:38,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:38,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-27 15:38:38,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:40,617 INFO L124 PetriNetUnfolderBase]: 17499/23579 cut-off events. [2024-01-27 15:38:40,618 INFO L125 PetriNetUnfolderBase]: For 95105/95447 co-relation queries the response was YES. [2024-01-27 15:38:40,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93550 conditions, 23579 events. 17499/23579 cut-off events. For 95105/95447 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 127435 event pairs, 5260 based on Foata normal form. 56/23541 useless extension candidates. Maximal degree in co-relation 88009. Up to 11696 conditions per place. [2024-01-27 15:38:40,784 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 131 selfloop transitions, 34 changer transitions 12/202 dead transitions. [2024-01-27 15:38:40,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 202 transitions, 2155 flow [2024-01-27 15:38:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-01-27 15:38:40,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-01-27 15:38:40,786 INFO L175 Difference]: Start difference. First operand has 122 places, 156 transitions, 1644 flow. Second operand 5 states and 125 transitions. [2024-01-27 15:38:40,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 202 transitions, 2155 flow [2024-01-27 15:38:42,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 202 transitions, 1971 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-01-27 15:38:42,070 INFO L231 Difference]: Finished difference. Result has 115 places, 155 transitions, 1513 flow [2024-01-27 15:38:42,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1461, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1513, PETRI_PLACES=115, PETRI_TRANSITIONS=155} [2024-01-27 15:38:42,071 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 68 predicate places. [2024-01-27 15:38:42,071 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 155 transitions, 1513 flow [2024-01-27 15:38:42,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 15:38:42,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:42,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:42,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-27 15:38:42,071 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:42,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1072002265, now seen corresponding path program 1 times [2024-01-27 15:38:42,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:42,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218707217] [2024-01-27 15:38:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:42,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:42,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:42,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218707217] [2024-01-27 15:38:42,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218707217] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:42,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595929296] [2024-01-27 15:38:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:42,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:42,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:42,169 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:42,170 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 15:38:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:42,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:38:42,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:42,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:42,367 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 15:38:42,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595929296] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:42,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:42,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-01-27 15:38:42,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275755744] [2024-01-27 15:38:42,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:42,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:38:42,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:42,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:38:42,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:38:42,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-27 15:38:42,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 155 transitions, 1513 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 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 15:38:42,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:42,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-27 15:38:42,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:46,533 INFO L124 PetriNetUnfolderBase]: 40901/57415 cut-off events. [2024-01-27 15:38:46,533 INFO L125 PetriNetUnfolderBase]: For 220180/221184 co-relation queries the response was YES. [2024-01-27 15:38:46,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212170 conditions, 57415 events. 40901/57415 cut-off events. For 220180/221184 co-relation queries the response was YES. Maximal size of possible extension queue 1869. Compared 367103 event pairs, 4081 based on Foata normal form. 1801/59086 useless extension candidates. Maximal degree in co-relation 192376. Up to 20484 conditions per place. [2024-01-27 15:38:46,944 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 406 selfloop transitions, 22 changer transitions 5/481 dead transitions. [2024-01-27 15:38:46,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 481 transitions, 5164 flow [2024-01-27 15:38:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:38:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:38:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2024-01-27 15:38:46,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.770764119601329 [2024-01-27 15:38:46,945 INFO L175 Difference]: Start difference. First operand has 115 places, 155 transitions, 1513 flow. Second operand 7 states and 232 transitions. [2024-01-27 15:38:46,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 481 transitions, 5164 flow [2024-01-27 15:38:51,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 481 transitions, 4890 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-27 15:38:51,206 INFO L231 Difference]: Finished difference. Result has 118 places, 174 transitions, 1636 flow [2024-01-27 15:38:51,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1636, PETRI_PLACES=118, PETRI_TRANSITIONS=174} [2024-01-27 15:38:51,207 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 71 predicate places. [2024-01-27 15:38:51,207 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 174 transitions, 1636 flow [2024-01-27 15:38:51,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 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 15:38:51,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:51,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:51,221 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 15:38:51,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:38:51,419 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:38:51,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:51,420 INFO L85 PathProgramCache]: Analyzing trace with hash 106333929, now seen corresponding path program 2 times [2024-01-27 15:38:51,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:51,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636899490] [2024-01-27 15:38:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:51,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:51,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:51,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636899490] [2024-01-27 15:38:51,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636899490] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:51,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323291266] [2024-01-27 15:38:51,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:38:51,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:51,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:51,601 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 15:38:51,628 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 15:38:51,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:38:51,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:51,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:38:51,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:51,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:51,805 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 15:38:51,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323291266] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:51,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:38:51,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2024-01-27 15:38:51,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614494544] [2024-01-27 15:38:51,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:51,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:38:51,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:38:51,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:38:51,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-27 15:38:51,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 174 transitions, 1636 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 15:38:51,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:51,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-27 15:38:51,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand