./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-sorted.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-more-sorted.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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:48:29,643 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:48:29,732 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:48:29,735 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:48:29,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:48:29,763 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:48:29,763 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:48:29,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:48:29,764 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:48:29,768 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:48:29,768 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:48:29,768 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:48:29,769 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:48:29,770 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:48:29,770 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:48:29,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:48:29,771 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:48:29,771 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:48:29,771 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:48:29,772 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:48:29,772 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:48:29,772 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:48:29,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:48:29,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:48:29,773 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:48:29,773 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:48:29,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:48:29,774 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:48:29,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:48:29,775 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:48:29,776 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:48:29,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:48:29,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:48:29,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:48:29,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:48:29,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:48:29,777 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:48:29,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:48:29,777 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:48:29,778 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:48:29,778 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:48:29,778 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:48:29,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:48:29,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2024-01-27 15:48:30,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:48:30,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:48:30,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:48:30,053 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:48:30,053 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:48:30,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2024-01-27 15:48:31,231 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:48:31,408 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:48:31,409 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2024-01-27 15:48:31,415 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9dfdf550/7b03b5882e864f47a997fade74b73294/FLAG2d057c282 [2024-01-27 15:48:31,424 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9dfdf550/7b03b5882e864f47a997fade74b73294 [2024-01-27 15:48:31,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:48:31,427 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:48:31,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:48:31,428 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:48:31,432 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:48:31,433 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,433 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e1c6c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31, skipping insertion in model container [2024-01-27 15:48:31,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,453 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:48:31,636 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-more-sorted.wvr.c[2473,2486] [2024-01-27 15:48:31,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:48:31,667 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:48:31,706 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-more-sorted.wvr.c[2473,2486] [2024-01-27 15:48:31,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:48:31,728 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:48:31,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31 WrapperNode [2024-01-27 15:48:31,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:48:31,730 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:48:31,730 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:48:31,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:48:31,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,756 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,787 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 108 [2024-01-27 15:48:31,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:48:31,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:48:31,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:48:31,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:48:31,801 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,817 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,832 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 2, 7]. 47 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 15:48:31,833 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,833 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,839 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,842 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,843 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,845 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,847 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:48:31,848 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:48:31,848 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:48:31,848 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:48:31,849 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (1/1) ... [2024-01-27 15:48:31,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:48:31,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:31,882 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 15:48:31,905 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 15:48:31,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:48:31,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:48:31,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:48:31,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:48:31,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:48:31,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:48:31,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:48:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:48:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:48:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:48:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:48:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:48:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:48:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:48:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:48:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:48:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:48:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:48:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:48:31,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:48:31,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:48:31,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:48:31,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:48:31,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:48:31,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:48:31,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:48:31,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:48:31,941 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 15:48:32,066 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:48:32,068 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:48:32,335 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:48:32,336 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:48:32,658 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:48:32,661 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:48:32,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:48:32 BoogieIcfgContainer [2024-01-27 15:48:32,662 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:48:32,664 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:48:32,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:48:32,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:48:32,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:48:31" (1/3) ... [2024-01-27 15:48:32,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ae42d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:48:32, skipping insertion in model container [2024-01-27 15:48:32,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:48:31" (2/3) ... [2024-01-27 15:48:32,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ae42d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:48:32, skipping insertion in model container [2024-01-27 15:48:32,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:48:32" (3/3) ... [2024-01-27 15:48:32,672 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2024-01-27 15:48:32,682 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:48:32,691 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:48:32,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:48:32,692 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:48:32,749 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:48:32,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 29 transitions, 79 flow [2024-01-27 15:48:32,832 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-01-27 15:48:32,832 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:48:32,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 26 events. 4/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-01-27 15:48:32,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 29 transitions, 79 flow [2024-01-27 15:48:32,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 25 transitions, 68 flow [2024-01-27 15:48:32,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:48:32,855 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;@7dde38c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:48:32,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:48:32,865 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:48:32,865 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-01-27 15:48:32,865 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:48:32,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:32,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:32,866 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 1 more)] === [2024-01-27 15:48:32,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:32,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1156419748, now seen corresponding path program 1 times [2024-01-27 15:48:32,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:32,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906799200] [2024-01-27 15:48:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:32,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:33,285 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 15:48:33,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:33,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906799200] [2024-01-27 15:48:33,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906799200] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:48:33,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:48:33,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:48:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104135021] [2024-01-27 15:48:33,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:48:33,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:48:33,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:33,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:48:33,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:48:33,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:33,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 15:48:33,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:33,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:33,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:33,525 INFO L124 PetriNetUnfolderBase]: 221/329 cut-off events. [2024-01-27 15:48:33,526 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-01-27 15:48:33,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 329 events. 221/329 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 769 event pairs, 138 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2024-01-27 15:48:33,532 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 23 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2024-01-27 15:48:33,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 120 flow [2024-01-27 15:48:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:48:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:48:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2024-01-27 15:48:33,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2024-01-27 15:48:33,544 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 68 flow. Second operand 3 states and 38 transitions. [2024-01-27 15:48:33,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 120 flow [2024-01-27 15:48:33,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:48:33,550 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 68 flow [2024-01-27 15:48:33,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2024-01-27 15:48:33,554 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-01-27 15:48:33,554 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 68 flow [2024-01-27 15:48:33,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 15:48:33,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:33,555 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] [2024-01-27 15:48:33,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:48:33,556 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 1 more)] === [2024-01-27 15:48:33,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1376474983, now seen corresponding path program 1 times [2024-01-27 15:48:33,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:33,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386762432] [2024-01-27 15:48:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:33,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:33,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:33,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386762432] [2024-01-27 15:48:33,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386762432] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:48:33,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:48:33,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:48:33,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308130189] [2024-01-27 15:48:33,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:48:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:48:33,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:33,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:48:33,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:48:33,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:33,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:33,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:33,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:33,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:34,073 INFO L124 PetriNetUnfolderBase]: 429/634 cut-off events. [2024-01-27 15:48:34,074 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-01-27 15:48:34,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1299 conditions, 634 events. 429/634 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2021 event pairs, 138 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 1288. Up to 392 conditions per place. [2024-01-27 15:48:34,080 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 39 selfloop transitions, 4 changer transitions 1/45 dead transitions. [2024-01-27 15:48:34,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 199 flow [2024-01-27 15:48:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:48:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:48:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-01-27 15:48:34,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436781609195402 [2024-01-27 15:48:34,083 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 68 flow. Second operand 3 states and 56 transitions. [2024-01-27 15:48:34,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 199 flow [2024-01-27 15:48:34,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 45 transitions, 195 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:48:34,085 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 90 flow [2024-01-27 15:48:34,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-01-27 15:48:34,086 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-01-27 15:48:34,086 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 90 flow [2024-01-27 15:48:34,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:34,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:34,087 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] [2024-01-27 15:48:34,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:48:34,087 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 1 more)] === [2024-01-27 15:48:34,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash 117608914, now seen corresponding path program 1 times [2024-01-27 15:48:34,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:34,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742515192] [2024-01-27 15:48:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:34,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:34,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:34,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742515192] [2024-01-27 15:48:34,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742515192] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:34,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148460078] [2024-01-27 15:48:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:34,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:34,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:34,248 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 15:48:34,250 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 15:48:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:34,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:48:34,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:34,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:34,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148460078] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:34,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:34,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-01-27 15:48:34,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265861821] [2024-01-27 15:48:34,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:34,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:48:34,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:48:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:48:34,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:34,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 90 flow. Second operand has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 13 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 15:48:34,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:34,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:34,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:34,940 INFO L124 PetriNetUnfolderBase]: 783/1184 cut-off events. [2024-01-27 15:48:34,941 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2024-01-27 15:48:34,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 1184 events. 783/1184 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4428 event pairs, 443 based on Foata normal form. 56/1240 useless extension candidates. Maximal degree in co-relation 1529. Up to 633 conditions per place. [2024-01-27 15:48:34,948 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 59 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2024-01-27 15:48:34,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 66 transitions, 331 flow [2024-01-27 15:48:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:48:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:48:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-01-27 15:48:34,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2024-01-27 15:48:34,951 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 90 flow. Second operand 6 states and 83 transitions. [2024-01-27 15:48:34,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 66 transitions, 331 flow [2024-01-27 15:48:34,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 66 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:48:34,956 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 132 flow [2024-01-27 15:48:34,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=132, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-01-27 15:48:34,957 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-01-27 15:48:34,957 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 132 flow [2024-01-27 15:48:34,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 13 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 15:48:34,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:34,958 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] [2024-01-27 15:48:34,976 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 15:48:35,172 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 15:48:35,173 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 1 more)] === [2024-01-27 15:48:35,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:35,173 INFO L85 PathProgramCache]: Analyzing trace with hash 482420998, now seen corresponding path program 1 times [2024-01-27 15:48:35,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:35,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059062447] [2024-01-27 15:48:35,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:35,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:35,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:35,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059062447] [2024-01-27 15:48:35,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059062447] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:35,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856960383] [2024-01-27 15:48:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:35,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:35,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:35,306 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 15:48:35,321 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 15:48:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:35,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:48:35,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:35,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:35,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856960383] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:35,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:35,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-01-27 15:48:35,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943483895] [2024-01-27 15:48:35,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:35,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:48:35,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:35,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:48:35,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:48:35,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:35,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 132 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 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 15:48:35,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:35,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:35,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:35,741 INFO L124 PetriNetUnfolderBase]: 683/1048 cut-off events. [2024-01-27 15:48:35,741 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2024-01-27 15:48:35,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 1048 events. 683/1048 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3893 event pairs, 433 based on Foata normal form. 38/1086 useless extension candidates. Maximal degree in co-relation 1632. Up to 633 conditions per place. [2024-01-27 15:48:35,746 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 55 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2024-01-27 15:48:35,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 62 transitions, 338 flow [2024-01-27 15:48:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:48:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:48:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 81 transitions. [2024-01-27 15:48:35,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2024-01-27 15:48:35,755 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 132 flow. Second operand 6 states and 81 transitions. [2024-01-27 15:48:35,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 62 transitions, 338 flow [2024-01-27 15:48:35,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 328 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-27 15:48:35,759 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 151 flow [2024-01-27 15:48:35,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=151, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-01-27 15:48:35,760 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2024-01-27 15:48:35,760 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 151 flow [2024-01-27 15:48:35,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 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 15:48:35,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:35,761 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] [2024-01-27 15:48:35,778 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 15:48:35,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-01-27 15:48:35,978 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 1 more)] === [2024-01-27 15:48:35,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:35,979 INFO L85 PathProgramCache]: Analyzing trace with hash -396920757, now seen corresponding path program 1 times [2024-01-27 15:48:35,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:35,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883362305] [2024-01-27 15:48:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:35,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:36,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:36,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883362305] [2024-01-27 15:48:36,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883362305] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:36,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059933094] [2024-01-27 15:48:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:36,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:36,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:36,148 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 15:48:36,151 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 15:48:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:36,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:48:36,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:36,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:36,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059933094] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:36,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:36,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-01-27 15:48:36,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416397296] [2024-01-27 15:48:36,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:36,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:48:36,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:48:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:48:36,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:36,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 151 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:36,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:36,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:36,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:36,663 INFO L124 PetriNetUnfolderBase]: 567/877 cut-off events. [2024-01-27 15:48:36,663 INFO L125 PetriNetUnfolderBase]: For 866/866 co-relation queries the response was YES. [2024-01-27 15:48:36,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528 conditions, 877 events. 567/877 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3064 event pairs, 369 based on Foata normal form. 26/903 useless extension candidates. Maximal degree in co-relation 1782. Up to 633 conditions per place. [2024-01-27 15:48:36,668 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 26 selfloop transitions, 3 changer transitions 27/57 dead transitions. [2024-01-27 15:48:36,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 331 flow [2024-01-27 15:48:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:48:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:48:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2024-01-27 15:48:36,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-01-27 15:48:36,670 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 151 flow. Second operand 6 states and 78 transitions. [2024-01-27 15:48:36,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 331 flow [2024-01-27 15:48:36,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 324 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:48:36,673 INFO L231 Difference]: Finished difference. Result has 46 places, 30 transitions, 122 flow [2024-01-27 15:48:36,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=46, PETRI_TRANSITIONS=30} [2024-01-27 15:48:36,674 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 15 predicate places. [2024-01-27 15:48:36,674 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 30 transitions, 122 flow [2024-01-27 15:48:36,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:36,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:36,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:36,692 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 15:48:36,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:36,888 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 1 more)] === [2024-01-27 15:48:36,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:36,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1712452761, now seen corresponding path program 2 times [2024-01-27 15:48:36,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:36,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383692656] [2024-01-27 15:48:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:36,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:37,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:37,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383692656] [2024-01-27 15:48:37,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383692656] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:37,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203811617] [2024-01-27 15:48:37,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:48:37,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:37,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:37,037 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 15:48:37,039 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 15:48:37,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:48:37,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:37,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:48:37,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:37,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:37,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203811617] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:37,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:48:37,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2024-01-27 15:48:37,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672507971] [2024-01-27 15:48:37,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:48:37,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:48:37,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:37,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:48:37,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:48:37,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:37,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 30 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:37,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:37,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:37,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:37,646 INFO L124 PetriNetUnfolderBase]: 578/863 cut-off events. [2024-01-27 15:48:37,646 INFO L125 PetriNetUnfolderBase]: For 773/773 co-relation queries the response was YES. [2024-01-27 15:48:37,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 863 events. 578/863 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3050 event pairs, 166 based on Foata normal form. 18/881 useless extension candidates. Maximal degree in co-relation 2596. Up to 421 conditions per place. [2024-01-27 15:48:37,652 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 62 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-01-27 15:48:37,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 73 transitions, 430 flow [2024-01-27 15:48:37,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:48:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:48:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-01-27 15:48:37,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-01-27 15:48:37,655 INFO L175 Difference]: Start difference. First operand has 46 places, 30 transitions, 122 flow. Second operand 8 states and 96 transitions. [2024-01-27 15:48:37,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 73 transitions, 430 flow [2024-01-27 15:48:37,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 73 transitions, 360 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-01-27 15:48:37,663 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 153 flow [2024-01-27 15:48:37,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=153, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-01-27 15:48:37,664 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-01-27 15:48:37,664 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 153 flow [2024-01-27 15:48:37,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:37,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:37,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:37,683 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 15:48:37,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:37,880 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 1 more)] === [2024-01-27 15:48:37,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash -78532163, now seen corresponding path program 3 times [2024-01-27 15:48:37,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:37,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949025585] [2024-01-27 15:48:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:38,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:38,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949025585] [2024-01-27 15:48:38,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949025585] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:38,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307136484] [2024-01-27 15:48:38,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:48:38,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:38,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:38,013 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 15:48:38,017 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 15:48:38,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:48:38,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:38,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:48:38,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:38,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:38,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307136484] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:38,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:48:38,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2024-01-27 15:48:38,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012624290] [2024-01-27 15:48:38,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:48:38,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:48:38,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:48:38,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:48:38,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:38,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:38,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:38,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:38,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:38,475 INFO L124 PetriNetUnfolderBase]: 765/1146 cut-off events. [2024-01-27 15:48:38,476 INFO L125 PetriNetUnfolderBase]: For 1069/1069 co-relation queries the response was YES. [2024-01-27 15:48:38,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 1146 events. 765/1146 cut-off events. For 1069/1069 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4245 event pairs, 264 based on Foata normal form. 14/1160 useless extension candidates. Maximal degree in co-relation 3453. Up to 665 conditions per place. [2024-01-27 15:48:38,482 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 64 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-01-27 15:48:38,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 78 transitions, 475 flow [2024-01-27 15:48:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:48:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:48:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-01-27 15:48:38,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-01-27 15:48:38,484 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 153 flow. Second operand 8 states and 92 transitions. [2024-01-27 15:48:38,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 78 transitions, 475 flow [2024-01-27 15:48:38,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 78 transitions, 438 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-01-27 15:48:38,487 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 210 flow [2024-01-27 15:48:38,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-01-27 15:48:38,488 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-01-27 15:48:38,488 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 210 flow [2024-01-27 15:48:38,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:38,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:38,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:38,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:38,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:38,703 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 1 more)] === [2024-01-27 15:48:38,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1654592017, now seen corresponding path program 4 times [2024-01-27 15:48:38,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:38,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320988204] [2024-01-27 15:48:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:38,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:38,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:38,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320988204] [2024-01-27 15:48:38,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320988204] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:38,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862706916] [2024-01-27 15:48:38,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:48:38,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:38,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:38,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:38,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:48:38,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:48:38,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:38,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:48:38,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:39,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:39,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862706916] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:39,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:48:39,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2024-01-27 15:48:39,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777084852] [2024-01-27 15:48:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:48:39,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:48:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:48:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:48:39,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:39,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 210 flow. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:39,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:39,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:39,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:39,399 INFO L124 PetriNetUnfolderBase]: 887/1336 cut-off events. [2024-01-27 15:48:39,399 INFO L125 PetriNetUnfolderBase]: For 2396/2396 co-relation queries the response was YES. [2024-01-27 15:48:39,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 1336 events. 887/1336 cut-off events. For 2396/2396 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5187 event pairs, 362 based on Foata normal form. 18/1354 useless extension candidates. Maximal degree in co-relation 4667. Up to 942 conditions per place. [2024-01-27 15:48:39,409 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 62 selfloop transitions, 18 changer transitions 0/81 dead transitions. [2024-01-27 15:48:39,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 555 flow [2024-01-27 15:48:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:48:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:48:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-01-27 15:48:39,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40086206896551724 [2024-01-27 15:48:39,411 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 210 flow. Second operand 8 states and 93 transitions. [2024-01-27 15:48:39,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 555 flow [2024-01-27 15:48:39,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 81 transitions, 512 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-01-27 15:48:39,416 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 307 flow [2024-01-27 15:48:39,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=307, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-01-27 15:48:39,420 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 22 predicate places. [2024-01-27 15:48:39,420 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 307 flow [2024-01-27 15:48:39,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:39,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:39,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:39,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:39,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:39,637 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 1 more)] === [2024-01-27 15:48:39,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:39,637 INFO L85 PathProgramCache]: Analyzing trace with hash 383144769, now seen corresponding path program 5 times [2024-01-27 15:48:39,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:39,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841461135] [2024-01-27 15:48:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:39,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:39,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:39,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841461135] [2024-01-27 15:48:39,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841461135] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:39,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124006300] [2024-01-27 15:48:39,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:48:39,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:39,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:39,776 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:39,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:48:39,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:48:39,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:39,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:48:39,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:39,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:40,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124006300] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:40,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:40,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-27 15:48:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776422477] [2024-01-27 15:48:40,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:40,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:48:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:48:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:48:40,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:40,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 307 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:40,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:40,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:40,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:40,730 INFO L124 PetriNetUnfolderBase]: 869/1318 cut-off events. [2024-01-27 15:48:40,730 INFO L125 PetriNetUnfolderBase]: For 3499/3499 co-relation queries the response was YES. [2024-01-27 15:48:40,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5106 conditions, 1318 events. 869/1318 cut-off events. For 3499/3499 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5301 event pairs, 166 based on Foata normal form. 18/1336 useless extension candidates. Maximal degree in co-relation 5071. Up to 459 conditions per place. [2024-01-27 15:48:40,740 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 104 selfloop transitions, 72 changer transitions 0/177 dead transitions. [2024-01-27 15:48:40,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 177 transitions, 1396 flow [2024-01-27 15:48:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:48:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:48:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 199 transitions. [2024-01-27 15:48:40,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36116152450090744 [2024-01-27 15:48:40,742 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 307 flow. Second operand 19 states and 199 transitions. [2024-01-27 15:48:40,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 177 transitions, 1396 flow [2024-01-27 15:48:40,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 177 transitions, 1274 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-01-27 15:48:40,751 INFO L231 Difference]: Finished difference. Result has 68 places, 102 transitions, 844 flow [2024-01-27 15:48:40,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=844, PETRI_PLACES=68, PETRI_TRANSITIONS=102} [2024-01-27 15:48:40,752 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2024-01-27 15:48:40,752 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 102 transitions, 844 flow [2024-01-27 15:48:40,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:40,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:40,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:40,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:40,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:40,975 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 1 more)] === [2024-01-27 15:48:40,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1308679083, now seen corresponding path program 6 times [2024-01-27 15:48:40,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:40,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328848914] [2024-01-27 15:48:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:41,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328848914] [2024-01-27 15:48:41,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328848914] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225189346] [2024-01-27 15:48:41,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:48:41,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:41,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:41,122 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:41,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:48:41,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:48:41,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:41,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:48:41,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:41,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:41,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225189346] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:41,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:48:41,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2024-01-27 15:48:41,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099535103] [2024-01-27 15:48:41,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:48:41,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:48:41,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:41,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:48:41,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:48:41,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:41,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 102 transitions, 844 flow. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:41,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:41,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:41,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:41,727 INFO L124 PetriNetUnfolderBase]: 850/1277 cut-off events. [2024-01-27 15:48:41,728 INFO L125 PetriNetUnfolderBase]: For 3700/3700 co-relation queries the response was YES. [2024-01-27 15:48:41,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5465 conditions, 1277 events. 850/1277 cut-off events. For 3700/3700 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4935 event pairs, 272 based on Foata normal form. 14/1291 useless extension candidates. Maximal degree in co-relation 5427. Up to 924 conditions per place. [2024-01-27 15:48:41,739 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 92 selfloop transitions, 47 changer transitions 0/140 dead transitions. [2024-01-27 15:48:41,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 140 transitions, 1278 flow [2024-01-27 15:48:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:48:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:48:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-01-27 15:48:41,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-01-27 15:48:41,741 INFO L175 Difference]: Start difference. First operand has 68 places, 102 transitions, 844 flow. Second operand 9 states and 102 transitions. [2024-01-27 15:48:41,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 140 transitions, 1278 flow [2024-01-27 15:48:41,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 140 transitions, 1141 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-01-27 15:48:41,758 INFO L231 Difference]: Finished difference. Result has 72 places, 106 transitions, 852 flow [2024-01-27 15:48:41,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=852, PETRI_PLACES=72, PETRI_TRANSITIONS=106} [2024-01-27 15:48:41,759 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-01-27 15:48:41,759 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 106 transitions, 852 flow [2024-01-27 15:48:41,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:41,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:41,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:41,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:41,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-27 15:48:41,975 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 1 more)] === [2024-01-27 15:48:41,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1677715033, now seen corresponding path program 7 times [2024-01-27 15:48:41,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:41,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625361810] [2024-01-27 15:48:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:41,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:42,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:42,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625361810] [2024-01-27 15:48:42,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625361810] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:42,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301563158] [2024-01-27 15:48:42,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:48:42,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:42,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:42,127 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:42,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:48:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:42,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:48:42,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:42,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:42,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301563158] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:42,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:48:42,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2024-01-27 15:48:42,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693762298] [2024-01-27 15:48:42,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:48:42,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:48:42,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:48:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:48:42,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:42,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 106 transitions, 852 flow. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:42,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:42,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:42,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:42,737 INFO L124 PetriNetUnfolderBase]: 831/1236 cut-off events. [2024-01-27 15:48:42,737 INFO L125 PetriNetUnfolderBase]: For 3815/3815 co-relation queries the response was YES. [2024-01-27 15:48:42,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5315 conditions, 1236 events. 831/1236 cut-off events. For 3815/3815 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4687 event pairs, 234 based on Foata normal form. 14/1250 useless extension candidates. Maximal degree in co-relation 5275. Up to 697 conditions per place. [2024-01-27 15:48:42,747 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 75 selfloop transitions, 51 changer transitions 0/127 dead transitions. [2024-01-27 15:48:42,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 127 transitions, 1150 flow [2024-01-27 15:48:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:48:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:48:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-01-27 15:48:42,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40086206896551724 [2024-01-27 15:48:42,748 INFO L175 Difference]: Start difference. First operand has 72 places, 106 transitions, 852 flow. Second operand 8 states and 93 transitions. [2024-01-27 15:48:42,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 127 transitions, 1150 flow [2024-01-27 15:48:42,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 127 transitions, 1044 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-01-27 15:48:42,760 INFO L231 Difference]: Finished difference. Result has 70 places, 102 transitions, 816 flow [2024-01-27 15:48:42,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=816, PETRI_PLACES=70, PETRI_TRANSITIONS=102} [2024-01-27 15:48:42,760 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2024-01-27 15:48:42,761 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 102 transitions, 816 flow [2024-01-27 15:48:42,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:42,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:42,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:42,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:42,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:42,976 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 1 more)] === [2024-01-27 15:48:42,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1248343712, now seen corresponding path program 2 times [2024-01-27 15:48:42,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:42,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131509712] [2024-01-27 15:48:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:42,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:43,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:43,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131509712] [2024-01-27 15:48:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131509712] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080188091] [2024-01-27 15:48:43,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:48:43,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:43,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:43,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:43,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:48:43,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:48:43,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:43,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:48:43,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:43,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:43,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080188091] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:43,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:48:43,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-01-27 15:48:43,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122112467] [2024-01-27 15:48:43,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:48:43,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:48:43,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:48:43,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:48:43,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:43,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 102 transitions, 816 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 15:48:43,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:43,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:43,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:43,487 INFO L124 PetriNetUnfolderBase]: 788/1161 cut-off events. [2024-01-27 15:48:43,487 INFO L125 PetriNetUnfolderBase]: For 3540/3540 co-relation queries the response was YES. [2024-01-27 15:48:43,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4782 conditions, 1161 events. 788/1161 cut-off events. For 3540/3540 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4240 event pairs, 246 based on Foata normal form. 70/1231 useless extension candidates. Maximal degree in co-relation 4742. Up to 923 conditions per place. [2024-01-27 15:48:43,495 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 116 selfloop transitions, 11 changer transitions 0/128 dead transitions. [2024-01-27 15:48:43,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 128 transitions, 1267 flow [2024-01-27 15:48:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:48:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:48:43,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-01-27 15:48:43,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2024-01-27 15:48:43,496 INFO L175 Difference]: Start difference. First operand has 70 places, 102 transitions, 816 flow. Second operand 6 states and 63 transitions. [2024-01-27 15:48:43,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 128 transitions, 1267 flow [2024-01-27 15:48:43,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 128 transitions, 1143 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-01-27 15:48:43,506 INFO L231 Difference]: Finished difference. Result has 69 places, 103 transitions, 754 flow [2024-01-27 15:48:43,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=754, PETRI_PLACES=69, PETRI_TRANSITIONS=103} [2024-01-27 15:48:43,506 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-01-27 15:48:43,506 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 103 transitions, 754 flow [2024-01-27 15:48:43,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 15:48:43,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:43,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:43,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:43,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 15:48:43,721 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 1 more)] === [2024-01-27 15:48:43,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:43,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2146614785, now seen corresponding path program 1 times [2024-01-27 15:48:43,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:43,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390272373] [2024-01-27 15:48:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:43,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:45,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:45,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390272373] [2024-01-27 15:48:45,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390272373] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:45,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258832100] [2024-01-27 15:48:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:45,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:45,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:45,102 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:45,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:48:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:45,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:48:45,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:45,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:48:45,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:48:45,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-01-27 15:48:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:45,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:47,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:48:47,389 INFO L349 Elim1Store]: treesize reduction 23, result has 34.3 percent of original size [2024-01-27 15:48:47,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 95 [2024-01-27 15:48:47,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:48:47,486 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2024-01-27 15:48:47,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 1 [2024-01-27 15:48:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:47,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258832100] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:47,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:47,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-27 15:48:47,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217001156] [2024-01-27 15:48:47,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:47,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:48:47,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:47,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:48:47,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:48:47,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:47,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 103 transitions, 754 flow. Second operand has 25 states, 25 states have (on average 6.84) internal successors, (171), 25 states have internal predecessors, (171), 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 15:48:47,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:47,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:47,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:49,796 INFO L124 PetriNetUnfolderBase]: 2035/2984 cut-off events. [2024-01-27 15:48:49,796 INFO L125 PetriNetUnfolderBase]: For 7891/7891 co-relation queries the response was YES. [2024-01-27 15:48:49,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12708 conditions, 2984 events. 2035/2984 cut-off events. For 7891/7891 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13206 event pairs, 253 based on Foata normal form. 1/2985 useless extension candidates. Maximal degree in co-relation 8330. Up to 1182 conditions per place. [2024-01-27 15:48:49,823 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 273 selfloop transitions, 120 changer transitions 1/395 dead transitions. [2024-01-27 15:48:49,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 395 transitions, 3696 flow [2024-01-27 15:48:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:48:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:48:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 197 transitions. [2024-01-27 15:48:49,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852216748768473 [2024-01-27 15:48:49,825 INFO L175 Difference]: Start difference. First operand has 69 places, 103 transitions, 754 flow. Second operand 14 states and 197 transitions. [2024-01-27 15:48:49,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 395 transitions, 3696 flow [2024-01-27 15:48:49,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 395 transitions, 3660 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-01-27 15:48:49,859 INFO L231 Difference]: Finished difference. Result has 84 places, 199 transitions, 1970 flow [2024-01-27 15:48:49,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1970, PETRI_PLACES=84, PETRI_TRANSITIONS=199} [2024-01-27 15:48:49,859 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-01-27 15:48:49,860 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 199 transitions, 1970 flow [2024-01-27 15:48:49,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.84) internal successors, (171), 25 states have internal predecessors, (171), 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 15:48:49,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:49,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:49,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:50,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:48:50,065 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 1 more)] === [2024-01-27 15:48:50,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash 984157060, now seen corresponding path program 1 times [2024-01-27 15:48:50,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:50,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926217038] [2024-01-27 15:48:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:50,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:51,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:51,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926217038] [2024-01-27 15:48:51,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926217038] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983017201] [2024-01-27 15:48:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:51,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:51,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:51,337 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:51,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:48:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:51,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:48:51,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:51,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:48:51,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 32 [2024-01-27 15:48:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:51,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:52,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:48:52,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 147 treesize of output 132 [2024-01-27 15:48:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983017201] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:52,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:52,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-27 15:48:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323876659] [2024-01-27 15:48:52,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:52,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:48:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:48:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:48:52,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:52,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 199 transitions, 1970 flow. Second operand has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 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 15:48:52,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:52,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:52,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:53,759 INFO L124 PetriNetUnfolderBase]: 2569/3734 cut-off events. [2024-01-27 15:48:53,760 INFO L125 PetriNetUnfolderBase]: For 14914/14914 co-relation queries the response was YES. [2024-01-27 15:48:53,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18426 conditions, 3734 events. 2569/3734 cut-off events. For 14914/14914 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16879 event pairs, 410 based on Foata normal form. 2/3736 useless extension candidates. Maximal degree in co-relation 16904. Up to 2956 conditions per place. [2024-01-27 15:48:53,787 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 205 selfloop transitions, 140 changer transitions 1/347 dead transitions. [2024-01-27 15:48:53,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 347 transitions, 3975 flow [2024-01-27 15:48:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:48:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:48:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-01-27 15:48:53,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42758620689655175 [2024-01-27 15:48:53,795 INFO L175 Difference]: Start difference. First operand has 84 places, 199 transitions, 1970 flow. Second operand 10 states and 124 transitions. [2024-01-27 15:48:53,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 347 transitions, 3975 flow [2024-01-27 15:48:53,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 347 transitions, 3750 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-01-27 15:48:53,867 INFO L231 Difference]: Finished difference. Result has 93 places, 282 transitions, 3100 flow [2024-01-27 15:48:53,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3100, PETRI_PLACES=93, PETRI_TRANSITIONS=282} [2024-01-27 15:48:53,868 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-01-27 15:48:53,868 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 282 transitions, 3100 flow [2024-01-27 15:48:53,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 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 15:48:53,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:53,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:53,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:54,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:48:54,088 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 1 more)] === [2024-01-27 15:48:54,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -347274663, now seen corresponding path program 2 times [2024-01-27 15:48:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:54,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276487314] [2024-01-27 15:48:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:54,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:55,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:55,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276487314] [2024-01-27 15:48:55,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276487314] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:55,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454773354] [2024-01-27 15:48:55,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:48:55,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:55,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:55,154 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:55,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:48:55,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:48:55,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:55,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:48:55,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:55,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:48:55,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:48:55,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:48:55,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 58 [2024-01-27 15:48:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:56,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:57,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:48:57,601 INFO L349 Elim1Store]: treesize reduction 21, result has 40.0 percent of original size [2024-01-27 15:48:57,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 93 [2024-01-27 15:48:57,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:48:57,643 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2024-01-27 15:48:57,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 1 [2024-01-27 15:48:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:57,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454773354] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:57,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:57,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2024-01-27 15:48:57,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174955477] [2024-01-27 15:48:57,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:57,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:48:57,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:48:57,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:48:57,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:48:57,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 282 transitions, 3100 flow. Second operand has 32 states, 32 states have (on average 6.21875) internal successors, (199), 32 states have internal predecessors, (199), 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 15:48:57,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:57,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:48:57,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:01,461 INFO L124 PetriNetUnfolderBase]: 2985/4430 cut-off events. [2024-01-27 15:49:01,461 INFO L125 PetriNetUnfolderBase]: For 21655/21655 co-relation queries the response was YES. [2024-01-27 15:49:01,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 4430 events. 2985/4430 cut-off events. For 21655/21655 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21604 event pairs, 430 based on Foata normal form. 2/4432 useless extension candidates. Maximal degree in co-relation 21843. Up to 3569 conditions per place. [2024-01-27 15:49:01,488 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 278 selfloop transitions, 157 changer transitions 6/442 dead transitions. [2024-01-27 15:49:01,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 442 transitions, 5210 flow [2024-01-27 15:49:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:49:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:49:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 224 transitions. [2024-01-27 15:49:01,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-01-27 15:49:01,491 INFO L175 Difference]: Start difference. First operand has 93 places, 282 transitions, 3100 flow. Second operand 21 states and 224 transitions. [2024-01-27 15:49:01,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 442 transitions, 5210 flow [2024-01-27 15:49:01,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 442 transitions, 5151 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-01-27 15:49:01,606 INFO L231 Difference]: Finished difference. Result has 117 places, 351 transitions, 4269 flow [2024-01-27 15:49:01,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4269, PETRI_PLACES=117, PETRI_TRANSITIONS=351} [2024-01-27 15:49:01,607 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 86 predicate places. [2024-01-27 15:49:01,607 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 351 transitions, 4269 flow [2024-01-27 15:49:01,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.21875) internal successors, (199), 32 states have internal predecessors, (199), 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 15:49:01,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:01,608 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:01,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:01,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:49:01,822 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 1 more)] === [2024-01-27 15:49:01,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash -807647807, now seen corresponding path program 3 times [2024-01-27 15:49:01,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:01,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107564610] [2024-01-27 15:49:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:02,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:02,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107564610] [2024-01-27 15:49:02,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107564610] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:02,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16121507] [2024-01-27 15:49:02,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:49:02,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:02,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:02,900 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:02,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:49:03,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:49:03,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:03,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:49:03,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:03,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:03,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:49:03,347 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:03,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 58 [2024-01-27 15:49:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:03,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:04,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2024-01-27 15:49:04,495 INFO L349 Elim1Store]: treesize reduction 13, result has 60.6 percent of original size [2024-01-27 15:49:04,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 107 [2024-01-27 15:49:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:04,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16121507] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:04,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:04,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-01-27 15:49:04,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099136336] [2024-01-27 15:49:04,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:04,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:49:04,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:04,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:49:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:49:04,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:04,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 351 transitions, 4269 flow. Second operand has 26 states, 26 states have (on average 6.769230769230769) internal successors, (176), 26 states have internal predecessors, (176), 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 15:49:04,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:04,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:04,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:07,006 INFO L124 PetriNetUnfolderBase]: 3514/5202 cut-off events. [2024-01-27 15:49:07,006 INFO L125 PetriNetUnfolderBase]: For 29919/29919 co-relation queries the response was YES. [2024-01-27 15:49:07,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29400 conditions, 5202 events. 3514/5202 cut-off events. For 29919/29919 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26077 event pairs, 430 based on Foata normal form. 3/5205 useless extension candidates. Maximal degree in co-relation 29137. Up to 1818 conditions per place. [2024-01-27 15:49:07,054 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 410 selfloop transitions, 262 changer transitions 12/685 dead transitions. [2024-01-27 15:49:07,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 685 transitions, 8742 flow [2024-01-27 15:49:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:49:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:49:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 303 transitions. [2024-01-27 15:49:07,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47492163009404387 [2024-01-27 15:49:07,058 INFO L175 Difference]: Start difference. First operand has 117 places, 351 transitions, 4269 flow. Second operand 22 states and 303 transitions. [2024-01-27 15:49:07,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 685 transitions, 8742 flow [2024-01-27 15:49:07,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 685 transitions, 8381 flow, removed 96 selfloop flow, removed 6 redundant places. [2024-01-27 15:49:07,310 INFO L231 Difference]: Finished difference. Result has 143 places, 431 transitions, 5664 flow [2024-01-27 15:49:07,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4013, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5664, PETRI_PLACES=143, PETRI_TRANSITIONS=431} [2024-01-27 15:49:07,311 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 112 predicate places. [2024-01-27 15:49:07,311 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 431 transitions, 5664 flow [2024-01-27 15:49:07,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.769230769230769) internal successors, (176), 26 states have internal predecessors, (176), 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 15:49:07,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:07,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:07,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:07,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:07,526 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 1 more)] === [2024-01-27 15:49:07,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1527536226, now seen corresponding path program 2 times [2024-01-27 15:49:07,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:07,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351006404] [2024-01-27 15:49:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:07,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:08,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:08,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351006404] [2024-01-27 15:49:08,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351006404] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:08,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384879378] [2024-01-27 15:49:08,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:49:08,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:08,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:08,593 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:08,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:49:08,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:08,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:08,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:49:08,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:08,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:08,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-01-27 15:49:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:08,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:09,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:09,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 125 [2024-01-27 15:49:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:09,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384879378] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:09,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:09,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-01-27 15:49:09,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871527191] [2024-01-27 15:49:09,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:09,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:49:09,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:09,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:49:09,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:49:09,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:09,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 431 transitions, 5664 flow. Second operand has 16 states, 16 states have (on average 7.5625) internal successors, (121), 16 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:09,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:09,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:09,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:11,118 INFO L124 PetriNetUnfolderBase]: 4174/6152 cut-off events. [2024-01-27 15:49:11,119 INFO L125 PetriNetUnfolderBase]: For 43177/43177 co-relation queries the response was YES. [2024-01-27 15:49:11,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37426 conditions, 6152 events. 4174/6152 cut-off events. For 43177/43177 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31703 event pairs, 476 based on Foata normal form. 2/6154 useless extension candidates. Maximal degree in co-relation 37132. Up to 4348 conditions per place. [2024-01-27 15:49:11,159 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 287 selfloop transitions, 313 changer transitions 1/602 dead transitions. [2024-01-27 15:49:11,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 602 transitions, 8695 flow [2024-01-27 15:49:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:49:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:49:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-01-27 15:49:11,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2024-01-27 15:49:11,161 INFO L175 Difference]: Start difference. First operand has 143 places, 431 transitions, 5664 flow. Second operand 10 states and 135 transitions. [2024-01-27 15:49:11,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 602 transitions, 8695 flow [2024-01-27 15:49:11,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 602 transitions, 8357 flow, removed 102 selfloop flow, removed 7 redundant places. [2024-01-27 15:49:11,463 INFO L231 Difference]: Finished difference. Result has 149 places, 510 transitions, 7350 flow [2024-01-27 15:49:11,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7350, PETRI_PLACES=149, PETRI_TRANSITIONS=510} [2024-01-27 15:49:11,464 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 118 predicate places. [2024-01-27 15:49:11,464 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 510 transitions, 7350 flow [2024-01-27 15:49:11,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.5625) internal successors, (121), 16 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:11,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:11,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:11,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-27 15:49:11,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:49:11,672 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:11,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1710304000, now seen corresponding path program 3 times [2024-01-27 15:49:11,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:11,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980090245] [2024-01-27 15:49:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:11,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:12,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:12,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980090245] [2024-01-27 15:49:12,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980090245] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:12,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213823841] [2024-01-27 15:49:12,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:49:12,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:12,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:12,571 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:12,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:49:12,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:49:12,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:12,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:49:12,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:12,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:12,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-01-27 15:49:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:13,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:13,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:13,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 147 treesize of output 132 [2024-01-27 15:49:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:13,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213823841] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:13,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:13,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-27 15:49:13,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038582264] [2024-01-27 15:49:13,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:49:13,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:13,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:49:13,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:49:13,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:13,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 510 transitions, 7350 flow. Second operand has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 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 15:49:13,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:13,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:13,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:15,079 INFO L124 PetriNetUnfolderBase]: 4386/6466 cut-off events. [2024-01-27 15:49:15,079 INFO L125 PetriNetUnfolderBase]: For 54083/54083 co-relation queries the response was YES. [2024-01-27 15:49:15,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41747 conditions, 6466 events. 4386/6466 cut-off events. For 54083/54083 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33546 event pairs, 726 based on Foata normal form. 2/6468 useless extension candidates. Maximal degree in co-relation 41459. Up to 5630 conditions per place. [2024-01-27 15:49:15,127 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 410 selfloop transitions, 182 changer transitions 1/594 dead transitions. [2024-01-27 15:49:15,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 594 transitions, 9366 flow [2024-01-27 15:49:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:49:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:49:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-01-27 15:49:15,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4674329501915709 [2024-01-27 15:49:15,129 INFO L175 Difference]: Start difference. First operand has 149 places, 510 transitions, 7350 flow. Second operand 9 states and 122 transitions. [2024-01-27 15:49:15,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 594 transitions, 9366 flow [2024-01-27 15:49:15,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 594 transitions, 9105 flow, removed 127 selfloop flow, removed 3 redundant places. [2024-01-27 15:49:15,399 INFO L231 Difference]: Finished difference. Result has 158 places, 526 transitions, 7919 flow [2024-01-27 15:49:15,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7091, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7919, PETRI_PLACES=158, PETRI_TRANSITIONS=526} [2024-01-27 15:49:15,399 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 127 predicate places. [2024-01-27 15:49:15,399 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 526 transitions, 7919 flow [2024-01-27 15:49:15,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 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 15:49:15,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:15,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:15,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:15,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:49:15,601 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:15,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash 167710625, now seen corresponding path program 4 times [2024-01-27 15:49:15,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:15,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204672880] [2024-01-27 15:49:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:15,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:16,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:16,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204672880] [2024-01-27 15:49:16,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204672880] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:16,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576757570] [2024-01-27 15:49:16,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:49:16,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:16,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:16,428 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:16,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:49:16,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:49:16,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:16,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:49:16,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:16,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:49:16,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:16,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 32 [2024-01-27 15:49:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:16,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:18,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576757570] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:18,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:18,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 26 [2024-01-27 15:49:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616543671] [2024-01-27 15:49:18,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:18,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:49:18,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:18,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:49:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:49:18,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:18,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 526 transitions, 7919 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 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 15:49:18,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:18,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:18,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:20,558 INFO L124 PetriNetUnfolderBase]: 4754/7030 cut-off events. [2024-01-27 15:49:20,558 INFO L125 PetriNetUnfolderBase]: For 61640/61640 co-relation queries the response was YES. [2024-01-27 15:49:20,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46044 conditions, 7030 events. 4754/7030 cut-off events. For 61640/61640 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 37277 event pairs, 626 based on Foata normal form. 4/7034 useless extension candidates. Maximal degree in co-relation 45744. Up to 5098 conditions per place. [2024-01-27 15:49:20,600 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 306 selfloop transitions, 337 changer transitions 2/646 dead transitions. [2024-01-27 15:49:20,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 646 transitions, 10366 flow [2024-01-27 15:49:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:49:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:49:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 185 transitions. [2024-01-27 15:49:20,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2024-01-27 15:49:20,602 INFO L175 Difference]: Start difference. First operand has 158 places, 526 transitions, 7919 flow. Second operand 15 states and 185 transitions. [2024-01-27 15:49:20,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 646 transitions, 10366 flow [2024-01-27 15:49:20,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 646 transitions, 9907 flow, removed 80 selfloop flow, removed 5 redundant places. [2024-01-27 15:49:20,948 INFO L231 Difference]: Finished difference. Result has 172 places, 555 transitions, 8684 flow [2024-01-27 15:49:20,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7482, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8684, PETRI_PLACES=172, PETRI_TRANSITIONS=555} [2024-01-27 15:49:20,949 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2024-01-27 15:49:20,949 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 555 transitions, 8684 flow [2024-01-27 15:49:20,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 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 15:49:20,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:20,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:20,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-01-27 15:49:21,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:21,158 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:21,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash -697674241, now seen corresponding path program 5 times [2024-01-27 15:49:21,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:21,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98105705] [2024-01-27 15:49:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:21,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:22,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:22,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98105705] [2024-01-27 15:49:22,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98105705] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:22,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080072858] [2024-01-27 15:49:22,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:49:22,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:22,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:22,196 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:22,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:49:22,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:22,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:22,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 15:49:22,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:22,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:22,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:22,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-01-27 15:49:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:22,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:23,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080072858] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:23,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 26 [2024-01-27 15:49:23,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286498204] [2024-01-27 15:49:23,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:23,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:49:23,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:49:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:49:23,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:23,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 555 transitions, 8684 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 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 15:49:23,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:23,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:23,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:26,472 INFO L124 PetriNetUnfolderBase]: 4966/7362 cut-off events. [2024-01-27 15:49:26,472 INFO L125 PetriNetUnfolderBase]: For 68275/68275 co-relation queries the response was YES. [2024-01-27 15:49:26,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48896 conditions, 7362 events. 4966/7362 cut-off events. For 68275/68275 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 39693 event pairs, 642 based on Foata normal form. 2/7364 useless extension candidates. Maximal degree in co-relation 48563. Up to 5260 conditions per place. [2024-01-27 15:49:26,520 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 320 selfloop transitions, 368 changer transitions 2/691 dead transitions. [2024-01-27 15:49:26,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 691 transitions, 11301 flow [2024-01-27 15:49:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:49:26,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:49:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 229 transitions. [2024-01-27 15:49:26,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39482758620689656 [2024-01-27 15:49:26,521 INFO L175 Difference]: Start difference. First operand has 172 places, 555 transitions, 8684 flow. Second operand 20 states and 229 transitions. [2024-01-27 15:49:26,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 691 transitions, 11301 flow [2024-01-27 15:49:26,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 691 transitions, 10827 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-01-27 15:49:26,924 INFO L231 Difference]: Finished difference. Result has 189 places, 590 transitions, 9726 flow [2024-01-27 15:49:26,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8218, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9726, PETRI_PLACES=189, PETRI_TRANSITIONS=590} [2024-01-27 15:49:26,925 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 158 predicate places. [2024-01-27 15:49:26,925 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 590 transitions, 9726 flow [2024-01-27 15:49:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 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 15:49:26,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:26,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:26,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-27 15:49:27,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:27,130 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:27,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1741876085, now seen corresponding path program 6 times [2024-01-27 15:49:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:27,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469900426] [2024-01-27 15:49:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:28,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:28,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469900426] [2024-01-27 15:49:28,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469900426] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:28,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811518087] [2024-01-27 15:49:28,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:49:28,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:28,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:28,074 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:28,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:49:28,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:49:28,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:28,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:49:28,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:28,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:28,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:28,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 148 [2024-01-27 15:49:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:30,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:32,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:49:32,271 INFO L349 Elim1Store]: treesize reduction 21, result has 40.0 percent of original size [2024-01-27 15:49:32,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 93 [2024-01-27 15:49:32,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:49:32,334 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2024-01-27 15:49:32,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 1 [2024-01-27 15:49:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:32,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811518087] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:32,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:32,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2024-01-27 15:49:32,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202476387] [2024-01-27 15:49:32,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:32,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:49:32,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:32,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:49:32,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:49:32,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:32,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 590 transitions, 9726 flow. Second operand has 32 states, 32 states have (on average 6.21875) internal successors, (199), 32 states have internal predecessors, (199), 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 15:49:32,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:32,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:32,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:40,493 INFO L124 PetriNetUnfolderBase]: 5388/8150 cut-off events. [2024-01-27 15:49:40,493 INFO L125 PetriNetUnfolderBase]: For 75608/75608 co-relation queries the response was YES. [2024-01-27 15:49:40,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55821 conditions, 8150 events. 5388/8150 cut-off events. For 75608/75608 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 46334 event pairs, 654 based on Foata normal form. 8/8158 useless extension candidates. Maximal degree in co-relation 55414. Up to 5525 conditions per place. [2024-01-27 15:49:40,553 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 370 selfloop transitions, 506 changer transitions 20/897 dead transitions. [2024-01-27 15:49:40,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 897 transitions, 14558 flow [2024-01-27 15:49:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-27 15:49:40,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-27 15:49:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 481 transitions. [2024-01-27 15:49:40,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3605697151424288 [2024-01-27 15:49:40,555 INFO L175 Difference]: Start difference. First operand has 189 places, 590 transitions, 9726 flow. Second operand 46 states and 481 transitions. [2024-01-27 15:49:40,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 897 transitions, 14558 flow [2024-01-27 15:49:41,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 897 transitions, 14104 flow, removed 109 selfloop flow, removed 12 redundant places. [2024-01-27 15:49:41,087 INFO L231 Difference]: Finished difference. Result has 237 places, 722 transitions, 12634 flow [2024-01-27 15:49:41,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9375, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=12634, PETRI_PLACES=237, PETRI_TRANSITIONS=722} [2024-01-27 15:49:41,088 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 206 predicate places. [2024-01-27 15:49:41,088 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 722 transitions, 12634 flow [2024-01-27 15:49:41,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.21875) internal successors, (199), 32 states have internal predecessors, (199), 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 15:49:41,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:41,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:41,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-01-27 15:49:41,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:41,289 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:41,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:41,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1330486257, now seen corresponding path program 7 times [2024-01-27 15:49:41,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:41,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963773561] [2024-01-27 15:49:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:41,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:42,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:42,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963773561] [2024-01-27 15:49:42,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963773561] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:42,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695407216] [2024-01-27 15:49:42,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:49:42,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:42,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:42,046 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:42,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:49:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:42,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 15:49:42,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:42,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:42,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:42,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-01-27 15:49:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:42,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:43,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695407216] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:43,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:43,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2024-01-27 15:49:43,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720684199] [2024-01-27 15:49:43,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:43,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:49:43,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:43,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:49:43,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:49:43,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:43,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 722 transitions, 12634 flow. Second operand has 23 states, 23 states have (on average 6.695652173913044) internal successors, (154), 23 states have internal predecessors, (154), 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 15:49:43,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:43,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:43,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:47,074 INFO L124 PetriNetUnfolderBase]: 5372/8130 cut-off events. [2024-01-27 15:49:47,074 INFO L125 PetriNetUnfolderBase]: For 92354/92354 co-relation queries the response was YES. [2024-01-27 15:49:47,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60497 conditions, 8130 events. 5372/8130 cut-off events. For 92354/92354 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 46227 event pairs, 732 based on Foata normal form. 2/8132 useless extension candidates. Maximal degree in co-relation 60075. Up to 5752 conditions per place. [2024-01-27 15:49:47,139 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 376 selfloop transitions, 437 changer transitions 3/817 dead transitions. [2024-01-27 15:49:47,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 817 transitions, 15058 flow [2024-01-27 15:49:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:49:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:49:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 220 transitions. [2024-01-27 15:49:47,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992740471869328 [2024-01-27 15:49:47,141 INFO L175 Difference]: Start difference. First operand has 237 places, 722 transitions, 12634 flow. Second operand 19 states and 220 transitions. [2024-01-27 15:49:47,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 817 transitions, 15058 flow [2024-01-27 15:49:47,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 817 transitions, 14016 flow, removed 327 selfloop flow, removed 15 redundant places. [2024-01-27 15:49:47,726 INFO L231 Difference]: Finished difference. Result has 241 places, 726 transitions, 12555 flow [2024-01-27 15:49:47,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11616, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12555, PETRI_PLACES=241, PETRI_TRANSITIONS=726} [2024-01-27 15:49:47,727 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 210 predicate places. [2024-01-27 15:49:47,727 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 726 transitions, 12555 flow [2024-01-27 15:49:47,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.695652173913044) internal successors, (154), 23 states have internal predecessors, (154), 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 15:49:47,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:47,727 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:47,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:47,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-01-27 15:49:47,928 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:47,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1270883297, now seen corresponding path program 8 times [2024-01-27 15:49:47,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:47,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968038864] [2024-01-27 15:49:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:47,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:48,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968038864] [2024-01-27 15:49:48,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968038864] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247791761] [2024-01-27 15:49:48,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:49:48,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:48,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:48,712 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:48,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:49:48,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:48,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:48,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 15:49:48,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:48,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:49,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:49,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 152 [2024-01-27 15:49:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:52,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:49:53,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247791761] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:53,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:53,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 24 [2024-01-27 15:49:53,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635571735] [2024-01-27 15:49:53,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:53,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:49:53,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:53,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:49:53,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:49:53,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:49:53,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 726 transitions, 12555 flow. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 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 15:49:53,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:53,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:49:53,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:59,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.92s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-27 15:50:01,399 INFO L124 PetriNetUnfolderBase]: 5845/8794 cut-off events. [2024-01-27 15:50:01,399 INFO L125 PetriNetUnfolderBase]: For 103815/103815 co-relation queries the response was YES. [2024-01-27 15:50:01,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65707 conditions, 8794 events. 5845/8794 cut-off events. For 103815/103815 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 50106 event pairs, 670 based on Foata normal form. 10/8792 useless extension candidates. Maximal degree in co-relation 65377. Up to 5928 conditions per place. [2024-01-27 15:50:01,464 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 325 selfloop transitions, 572 changer transitions 2/900 dead transitions. [2024-01-27 15:50:01,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 900 transitions, 16480 flow [2024-01-27 15:50:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:50:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:50:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 238 transitions. [2024-01-27 15:50:01,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-01-27 15:50:01,466 INFO L175 Difference]: Start difference. First operand has 241 places, 726 transitions, 12555 flow. Second operand 21 states and 238 transitions. [2024-01-27 15:50:01,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 900 transitions, 16480 flow [2024-01-27 15:50:02,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 900 transitions, 15827 flow, removed 2 selfloop flow, removed 18 redundant places. [2024-01-27 15:50:02,138 INFO L231 Difference]: Finished difference. Result has 252 places, 814 transitions, 14874 flow [2024-01-27 15:50:02,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11903, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=14874, PETRI_PLACES=252, PETRI_TRANSITIONS=814} [2024-01-27 15:50:02,139 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 221 predicate places. [2024-01-27 15:50:02,139 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 814 transitions, 14874 flow [2024-01-27 15:50:02,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:02,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:02,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:02,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:02,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-27 15:50:02,340 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:02,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash -909863194, now seen corresponding path program 4 times [2024-01-27 15:50:02,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:02,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635372960] [2024-01-27 15:50:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:02,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:03,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635372960] [2024-01-27 15:50:03,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635372960] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682104162] [2024-01-27 15:50:03,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:50:03,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:03,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:03,231 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:03,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:50:03,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:50:03,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:03,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:50:03,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:03,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:03,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 32 [2024-01-27 15:50:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:03,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:03,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:03,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 130 [2024-01-27 15:50:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682104162] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:04,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:04,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-01-27 15:50:04,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088420255] [2024-01-27 15:50:04,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:04,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:50:04,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:04,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:50:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:50:04,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:04,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 814 transitions, 14874 flow. Second operand has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:04,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:04,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:04,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:06,888 INFO L124 PetriNetUnfolderBase]: 6133/9216 cut-off events. [2024-01-27 15:50:06,888 INFO L125 PetriNetUnfolderBase]: For 140881/140881 co-relation queries the response was YES. [2024-01-27 15:50:06,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72954 conditions, 9216 events. 6133/9216 cut-off events. For 140881/140881 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 52709 event pairs, 920 based on Foata normal form. 2/9206 useless extension candidates. Maximal degree in co-relation 72599. Up to 8220 conditions per place. [2024-01-27 15:50:06,971 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 691 selfloop transitions, 176 changer transitions 1/869 dead transitions. [2024-01-27 15:50:06,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 869 transitions, 17187 flow [2024-01-27 15:50:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:50:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:50:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-01-27 15:50:06,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206896551724138 [2024-01-27 15:50:06,972 INFO L175 Difference]: Start difference. First operand has 252 places, 814 transitions, 14874 flow. Second operand 10 states and 122 transitions. [2024-01-27 15:50:06,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 869 transitions, 17187 flow [2024-01-27 15:50:07,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 869 transitions, 16482 flow, removed 324 selfloop flow, removed 4 redundant places. [2024-01-27 15:50:07,977 INFO L231 Difference]: Finished difference. Result has 259 places, 825 transitions, 14799 flow [2024-01-27 15:50:07,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14169, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14799, PETRI_PLACES=259, PETRI_TRANSITIONS=825} [2024-01-27 15:50:07,978 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 228 predicate places. [2024-01-27 15:50:07,978 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 825 transitions, 14799 flow [2024-01-27 15:50:07,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:07,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:07,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:07,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:08,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:08,180 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:08,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1828367261, now seen corresponding path program 9 times [2024-01-27 15:50:08,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:08,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177548307] [2024-01-27 15:50:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:08,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:08,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:08,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177548307] [2024-01-27 15:50:08,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177548307] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:08,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748476371] [2024-01-27 15:50:08,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:50:08,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:08,970 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:08,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:50:09,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:50:09,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:09,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 15:50:09,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:09,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:50:09,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:09,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-01-27 15:50:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:09,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:10,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748476371] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:10,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:10,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 24 [2024-01-27 15:50:10,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622646313] [2024-01-27 15:50:10,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:10,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:10,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:10,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:10,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:10,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 825 transitions, 14799 flow. Second operand has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:10,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:10,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:10,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:13,621 INFO L124 PetriNetUnfolderBase]: 6221/9370 cut-off events. [2024-01-27 15:50:13,621 INFO L125 PetriNetUnfolderBase]: For 141673/141673 co-relation queries the response was YES. [2024-01-27 15:50:13,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73819 conditions, 9370 events. 6221/9370 cut-off events. For 141673/141673 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 53920 event pairs, 866 based on Foata normal form. 2/9360 useless extension candidates. Maximal degree in co-relation 73455. Up to 8240 conditions per place. [2024-01-27 15:50:13,725 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 688 selfloop transitions, 212 changer transitions 2/903 dead transitions. [2024-01-27 15:50:13,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 903 transitions, 17398 flow [2024-01-27 15:50:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:50:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:50:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 172 transitions. [2024-01-27 15:50:13,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954022988505747 [2024-01-27 15:50:13,728 INFO L175 Difference]: Start difference. First operand has 259 places, 825 transitions, 14799 flow. Second operand 15 states and 172 transitions. [2024-01-27 15:50:13,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 903 transitions, 17398 flow [2024-01-27 15:50:14,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 903 transitions, 16940 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-01-27 15:50:14,848 INFO L231 Difference]: Finished difference. Result has 268 places, 842 transitions, 15129 flow [2024-01-27 15:50:14,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14353, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15129, PETRI_PLACES=268, PETRI_TRANSITIONS=842} [2024-01-27 15:50:14,849 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 237 predicate places. [2024-01-27 15:50:14,849 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 842 transitions, 15129 flow [2024-01-27 15:50:14,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:14,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:14,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:14,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:15,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:15,065 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:15,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash 617688135, now seen corresponding path program 10 times [2024-01-27 15:50:15,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:15,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816110619] [2024-01-27 15:50:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:15,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:15,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:15,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816110619] [2024-01-27 15:50:15,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816110619] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:15,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837099815] [2024-01-27 15:50:15,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:50:15,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:15,880 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:15,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:50:16,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:50:16,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:16,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:50:16,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:16,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:50:16,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:16,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 152 [2024-01-27 15:50:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:17,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:19,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:50:19,417 INFO L349 Elim1Store]: treesize reduction 21, result has 40.0 percent of original size [2024-01-27 15:50:19,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 97 [2024-01-27 15:50:19,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:50:19,476 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2024-01-27 15:50:19,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 1 [2024-01-27 15:50:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:19,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837099815] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:19,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:19,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2024-01-27 15:50:19,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444187667] [2024-01-27 15:50:19,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:19,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:50:19,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:19,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:50:19,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:50:19,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:19,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 842 transitions, 15129 flow. Second operand has 32 states, 32 states have (on average 6.21875) internal successors, (199), 32 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:19,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:19,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:19,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:24,953 INFO L124 PetriNetUnfolderBase]: 6305/9538 cut-off events. [2024-01-27 15:50:24,954 INFO L125 PetriNetUnfolderBase]: For 135787/135787 co-relation queries the response was YES. [2024-01-27 15:50:25,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74181 conditions, 9538 events. 6305/9538 cut-off events. For 135787/135787 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 55425 event pairs, 906 based on Foata normal form. 4/9530 useless extension candidates. Maximal degree in co-relation 73809. Up to 8523 conditions per place. [2024-01-27 15:50:25,047 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 684 selfloop transitions, 242 changer transitions 12/939 dead transitions. [2024-01-27 15:50:25,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 939 transitions, 18002 flow [2024-01-27 15:50:25,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:50:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:50:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 229 transitions. [2024-01-27 15:50:25,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34332833583208394 [2024-01-27 15:50:25,048 INFO L175 Difference]: Start difference. First operand has 268 places, 842 transitions, 15129 flow. Second operand 23 states and 229 transitions. [2024-01-27 15:50:25,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 939 transitions, 18002 flow [2024-01-27 15:50:25,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 939 transitions, 17612 flow, removed 67 selfloop flow, removed 10 redundant places. [2024-01-27 15:50:25,865 INFO L231 Difference]: Finished difference. Result has 289 places, 869 transitions, 15953 flow [2024-01-27 15:50:25,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14753, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15953, PETRI_PLACES=289, PETRI_TRANSITIONS=869} [2024-01-27 15:50:25,866 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2024-01-27 15:50:25,866 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 869 transitions, 15953 flow [2024-01-27 15:50:25,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.21875) internal successors, (199), 32 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:25,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:25,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:25,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:26,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:50:26,067 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:26,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:26,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1918910840, now seen corresponding path program 5 times [2024-01-27 15:50:26,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:26,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300695571] [2024-01-27 15:50:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:26,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:26,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:26,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300695571] [2024-01-27 15:50:26,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300695571] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:26,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593611505] [2024-01-27 15:50:26,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:50:26,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:26,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:26,739 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:26,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:50:26,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:26,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:26,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:50:26,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:27,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:27,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 32 [2024-01-27 15:50:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:27,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:27,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:27,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 147 treesize of output 132 [2024-01-27 15:50:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:27,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593611505] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:27,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:27,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-01-27 15:50:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379022435] [2024-01-27 15:50:27,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:27,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:50:27,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:27,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:50:27,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:50:27,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:27,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 869 transitions, 15953 flow. Second operand has 18 states, 18 states have (on average 7.722222222222222) internal successors, (139), 18 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:27,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:27,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:27,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:30,126 INFO L124 PetriNetUnfolderBase]: 6517/9848 cut-off events. [2024-01-27 15:50:30,126 INFO L125 PetriNetUnfolderBase]: For 156304/156304 co-relation queries the response was YES. [2024-01-27 15:50:30,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78535 conditions, 9848 events. 6517/9848 cut-off events. For 156304/156304 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 57492 event pairs, 1164 based on Foata normal form. 4/9840 useless extension candidates. Maximal degree in co-relation 78155. Up to 9026 conditions per place. [2024-01-27 15:50:30,231 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 734 selfloop transitions, 180 changer transitions 1/916 dead transitions. [2024-01-27 15:50:30,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 916 transitions, 18272 flow [2024-01-27 15:50:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:50:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:50:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-01-27 15:50:30,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:50:30,232 INFO L175 Difference]: Start difference. First operand has 289 places, 869 transitions, 15953 flow. Second operand 9 states and 116 transitions. [2024-01-27 15:50:30,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 916 transitions, 18272 flow [2024-01-27 15:50:31,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 916 transitions, 17690 flow, removed 166 selfloop flow, removed 10 redundant places. [2024-01-27 15:50:31,505 INFO L231 Difference]: Finished difference. Result has 288 places, 876 transitions, 15952 flow [2024-01-27 15:50:31,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=15363, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15952, PETRI_PLACES=288, PETRI_TRANSITIONS=876} [2024-01-27 15:50:31,506 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 257 predicate places. [2024-01-27 15:50:31,507 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 876 transitions, 15952 flow [2024-01-27 15:50:31,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.722222222222222) internal successors, (139), 18 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:31,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:31,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:31,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:31,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 15:50:31,711 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:31,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash -882338075, now seen corresponding path program 11 times [2024-01-27 15:50:31,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:31,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402239133] [2024-01-27 15:50:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:31,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:32,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:32,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402239133] [2024-01-27 15:50:32,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402239133] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:32,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404415051] [2024-01-27 15:50:32,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:50:32,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:32,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:32,620 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:32,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:50:32,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:50:32,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:32,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 15:50:32,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:32,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:50:33,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:33,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 152 [2024-01-27 15:50:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:36,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:50:37,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404415051] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:37,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 24 [2024-01-27 15:50:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586371503] [2024-01-27 15:50:37,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:37,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:50:37,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:50:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:50:37,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:37,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 876 transitions, 15952 flow. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:37,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:37,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:37,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:43,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-27 15:50:48,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-27 15:50:52,297 INFO L124 PetriNetUnfolderBase]: 7941/11892 cut-off events. [2024-01-27 15:50:52,297 INFO L125 PetriNetUnfolderBase]: For 216530/216530 co-relation queries the response was YES. [2024-01-27 15:50:52,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98090 conditions, 11892 events. 7941/11892 cut-off events. For 216530/216530 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 70571 event pairs, 834 based on Foata normal form. 6/11898 useless extension candidates. Maximal degree in co-relation 97710. Up to 8944 conditions per place. [2024-01-27 15:50:52,417 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 673 selfloop transitions, 481 changer transitions 3/1158 dead transitions. [2024-01-27 15:50:52,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1158 transitions, 22626 flow [2024-01-27 15:50:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:50:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:50:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 376 transitions. [2024-01-27 15:50:52,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813387423935091 [2024-01-27 15:50:52,419 INFO L175 Difference]: Start difference. First operand has 288 places, 876 transitions, 15952 flow. Second operand 34 states and 376 transitions. [2024-01-27 15:50:52,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1158 transitions, 22626 flow [2024-01-27 15:50:54,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1158 transitions, 22166 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-01-27 15:50:54,032 INFO L231 Difference]: Finished difference. Result has 334 places, 1045 transitions, 20299 flow [2024-01-27 15:50:54,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=15533, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20299, PETRI_PLACES=334, PETRI_TRANSITIONS=1045} [2024-01-27 15:50:54,038 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 303 predicate places. [2024-01-27 15:50:54,039 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 1045 transitions, 20299 flow [2024-01-27 15:50:54,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:54,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:54,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:54,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:54,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:50:54,257 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:50:54,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1270445787, now seen corresponding path program 12 times [2024-01-27 15:50:54,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:54,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451955008] [2024-01-27 15:50:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:54,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:55,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451955008] [2024-01-27 15:50:55,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451955008] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858505906] [2024-01-27 15:50:55,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:50:55,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:55,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:55,101 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:55,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-27 15:50:55,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:50:55,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:55,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:50:55,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:55,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:50:55,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:55,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 148 [2024-01-27 15:50:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:58,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:59,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:50:59,636 INFO L349 Elim1Store]: treesize reduction 21, result has 40.0 percent of original size [2024-01-27 15:50:59,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 93 [2024-01-27 15:50:59,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-01-27 15:50:59,687 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2024-01-27 15:50:59,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 1 [2024-01-27 15:50:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:59,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858505906] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:59,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:59,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2024-01-27 15:50:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978679036] [2024-01-27 15:50:59,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:59,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:50:59,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:50:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:50:59,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:50:59,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1045 transitions, 20299 flow. Second operand has 32 states, 32 states have (on average 6.25) internal successors, (200), 32 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:59,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:59,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:50:59,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:09,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:51:14,285 INFO L124 PetriNetUnfolderBase]: 8367/12603 cut-off events. [2024-01-27 15:51:14,285 INFO L125 PetriNetUnfolderBase]: For 322612/322612 co-relation queries the response was YES. [2024-01-27 15:51:14,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114326 conditions, 12603 events. 8367/12603 cut-off events. For 322612/322612 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 76403 event pairs, 1267 based on Foata normal form. 4/12607 useless extension candidates. Maximal degree in co-relation 113879. Up to 11189 conditions per place. [2024-01-27 15:51:14,446 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 867 selfloop transitions, 541 changer transitions 15/1424 dead transitions. [2024-01-27 15:51:14,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1424 transitions, 28766 flow [2024-01-27 15:51:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-27 15:51:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-27 15:51:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 562 transitions. [2024-01-27 15:51:14,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460591133004926 [2024-01-27 15:51:14,448 INFO L175 Difference]: Start difference. First operand has 334 places, 1045 transitions, 20299 flow. Second operand 56 states and 562 transitions. [2024-01-27 15:51:14,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1424 transitions, 28766 flow [2024-01-27 15:51:17,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1424 transitions, 26320 flow, removed 1210 selfloop flow, removed 4 redundant places. [2024-01-27 15:51:17,739 INFO L231 Difference]: Finished difference. Result has 407 places, 1250 transitions, 24123 flow [2024-01-27 15:51:17,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18667, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=24123, PETRI_PLACES=407, PETRI_TRANSITIONS=1250} [2024-01-27 15:51:17,743 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 376 predicate places. [2024-01-27 15:51:17,743 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1250 transitions, 24123 flow [2024-01-27 15:51:17,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.25) internal successors, (200), 32 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:17,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:17,743 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:51:17,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:17,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:51:17,958 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:51:17,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:17,959 INFO L85 PathProgramCache]: Analyzing trace with hash 185560384, now seen corresponding path program 13 times [2024-01-27 15:51:17,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:17,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714072305] [2024-01-27 15:51:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:17,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:18,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:18,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714072305] [2024-01-27 15:51:18,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714072305] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:18,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543318226] [2024-01-27 15:51:18,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:51:18,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:18,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:18,048 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:18,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-27 15:51:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:18,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:51:18,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:18,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:18,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543318226] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:18,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:18,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-27 15:51:18,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184423997] [2024-01-27 15:51:18,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:18,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:51:18,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:51:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:51:18,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:51:18,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1250 transitions, 24123 flow. Second operand has 17 states, 17 states have (on average 6.823529411764706) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:18,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:18,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:51:18,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:21,945 INFO L124 PetriNetUnfolderBase]: 7083/10517 cut-off events. [2024-01-27 15:51:21,945 INFO L125 PetriNetUnfolderBase]: For 270476/270476 co-relation queries the response was YES. [2024-01-27 15:51:22,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96679 conditions, 10517 events. 7083/10517 cut-off events. For 270476/270476 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 60662 event pairs, 1816 based on Foata normal form. 386/10903 useless extension candidates. Maximal degree in co-relation 96376. Up to 6857 conditions per place. [2024-01-27 15:51:22,053 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 1229 selfloop transitions, 186 changer transitions 0/1416 dead transitions. [2024-01-27 15:51:22,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1416 transitions, 28999 flow [2024-01-27 15:51:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:51:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:51:22,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-01-27 15:51:22,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421455938697318 [2024-01-27 15:51:22,054 INFO L175 Difference]: Start difference. First operand has 407 places, 1250 transitions, 24123 flow. Second operand 9 states and 110 transitions. [2024-01-27 15:51:22,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1416 transitions, 28999 flow [2024-01-27 15:51:23,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1416 transitions, 27681 flow, removed 509 selfloop flow, removed 15 redundant places. [2024-01-27 15:51:23,618 INFO L231 Difference]: Finished difference. Result has 402 places, 1225 transitions, 22960 flow [2024-01-27 15:51:23,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=21657, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1007, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22960, PETRI_PLACES=402, PETRI_TRANSITIONS=1225} [2024-01-27 15:51:23,619 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 371 predicate places. [2024-01-27 15:51:23,619 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1225 transitions, 22960 flow [2024-01-27 15:51:23,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.823529411764706) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:23,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:23,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:23,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:23,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:23,821 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:51:23,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:23,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1839765885, now seen corresponding path program 6 times [2024-01-27 15:51:23,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:23,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496203980] [2024-01-27 15:51:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:23,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:23,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:23,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496203980] [2024-01-27 15:51:23,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496203980] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:23,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76139258] [2024-01-27 15:51:23,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:51:23,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:23,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:23,928 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:23,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-27 15:51:24,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:51:24,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:24,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:51:24,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:24,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:24,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76139258] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:24,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:24,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-27 15:51:24,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627749466] [2024-01-27 15:51:24,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:24,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:51:24,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:24,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:51:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:51:24,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:51:24,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1225 transitions, 22960 flow. Second operand has 18 states, 18 states have (on average 6.666666666666667) internal successors, (120), 18 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:24,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:24,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:51:24,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:27,832 INFO L124 PetriNetUnfolderBase]: 6749/10151 cut-off events. [2024-01-27 15:51:27,833 INFO L125 PetriNetUnfolderBase]: For 247572/247572 co-relation queries the response was YES. [2024-01-27 15:51:27,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93168 conditions, 10151 events. 6749/10151 cut-off events. For 247572/247572 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 59878 event pairs, 1654 based on Foata normal form. 258/10409 useless extension candidates. Maximal degree in co-relation 92741. Up to 3790 conditions per place. [2024-01-27 15:51:27,956 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 1236 selfloop transitions, 237 changer transitions 26/1500 dead transitions. [2024-01-27 15:51:27,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1500 transitions, 29688 flow [2024-01-27 15:51:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:51:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:51:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-01-27 15:51:27,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525862068965517 [2024-01-27 15:51:27,957 INFO L175 Difference]: Start difference. First operand has 402 places, 1225 transitions, 22960 flow. Second operand 8 states and 105 transitions. [2024-01-27 15:51:27,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1500 transitions, 29688 flow [2024-01-27 15:51:29,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1500 transitions, 29486 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-01-27 15:51:29,692 INFO L231 Difference]: Finished difference. Result has 405 places, 1235 transitions, 23791 flow [2024-01-27 15:51:29,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=22705, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=984, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23791, PETRI_PLACES=405, PETRI_TRANSITIONS=1235} [2024-01-27 15:51:29,693 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 374 predicate places. [2024-01-27 15:51:29,693 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 1235 transitions, 23791 flow [2024-01-27 15:51:29,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.666666666666667) internal successors, (120), 18 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:29,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:29,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:29,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:29,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:29,896 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:51:29,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:29,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1618374590, now seen corresponding path program 1 times [2024-01-27 15:51:29,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:29,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653536038] [2024-01-27 15:51:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:29,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:30,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:30,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653536038] [2024-01-27 15:51:30,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653536038] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:30,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820354834] [2024-01-27 15:51:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:30,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:30,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:30,044 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:30,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-27 15:51:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:30,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:51:30,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:30,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:30,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820354834] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:30,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:30,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:51:30,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872159707] [2024-01-27 15:51:30,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:30,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:51:30,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:30,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:51:30,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:51:30,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:51:30,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 1235 transitions, 23791 flow. Second operand has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:30,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:30,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:51:30,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:34,016 INFO L124 PetriNetUnfolderBase]: 6849/10365 cut-off events. [2024-01-27 15:51:34,017 INFO L125 PetriNetUnfolderBase]: For 269159/269159 co-relation queries the response was YES. [2024-01-27 15:51:34,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97513 conditions, 10365 events. 6849/10365 cut-off events. For 269159/269159 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 62461 event pairs, 1434 based on Foata normal form. 122/10487 useless extension candidates. Maximal degree in co-relation 97093. Up to 3652 conditions per place. [2024-01-27 15:51:34,129 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 1292 selfloop transitions, 258 changer transitions 5/1556 dead transitions. [2024-01-27 15:51:34,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1556 transitions, 31351 flow [2024-01-27 15:51:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:51:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:51:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 150 transitions. [2024-01-27 15:51:34,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702194357366771 [2024-01-27 15:51:34,130 INFO L175 Difference]: Start difference. First operand has 405 places, 1235 transitions, 23791 flow. Second operand 11 states and 150 transitions. [2024-01-27 15:51:34,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1556 transitions, 31351 flow [2024-01-27 15:51:36,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1556 transitions, 31330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-01-27 15:51:36,097 INFO L231 Difference]: Finished difference. Result has 414 places, 1256 transitions, 24877 flow [2024-01-27 15:51:36,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23774, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=990, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=24877, PETRI_PLACES=414, PETRI_TRANSITIONS=1256} [2024-01-27 15:51:36,098 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 383 predicate places. [2024-01-27 15:51:36,098 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1256 transitions, 24877 flow [2024-01-27 15:51:36,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:36,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:36,098 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:36,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:36,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-01-27 15:51:36,299 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:51:36,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:36,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1480540702, now seen corresponding path program 2 times [2024-01-27 15:51:36,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:36,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055538671] [2024-01-27 15:51:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:36,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:36,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:36,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055538671] [2024-01-27 15:51:36,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055538671] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:36,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492798660] [2024-01-27 15:51:36,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:51:36,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:36,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:36,388 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:36,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-27 15:51:36,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:51:36,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:36,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:51:36,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:36,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492798660] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:36,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 15:51:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170803461] [2024-01-27 15:51:36,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:36,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:51:36,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:51:36,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:51:36,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:51:36,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1256 transitions, 24877 flow. Second operand has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:36,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:36,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:51:36,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:40,569 INFO L124 PetriNetUnfolderBase]: 7471/11225 cut-off events. [2024-01-27 15:51:40,569 INFO L125 PetriNetUnfolderBase]: For 328243/328243 co-relation queries the response was YES. [2024-01-27 15:51:40,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108964 conditions, 11225 events. 7471/11225 cut-off events. For 328243/328243 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 67579 event pairs, 1616 based on Foata normal form. 156/11381 useless extension candidates. Maximal degree in co-relation 108540. Up to 4156 conditions per place. [2024-01-27 15:51:40,700 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 1317 selfloop transitions, 330 changer transitions 7/1655 dead transitions. [2024-01-27 15:51:40,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1655 transitions, 33955 flow [2024-01-27 15:51:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:51:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:51:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-01-27 15:51:40,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511494252873563 [2024-01-27 15:51:40,701 INFO L175 Difference]: Start difference. First operand has 414 places, 1256 transitions, 24877 flow. Second operand 12 states and 157 transitions. [2024-01-27 15:51:40,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1655 transitions, 33955 flow [2024-01-27 15:51:43,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 1655 transitions, 33283 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-01-27 15:51:43,776 INFO L231 Difference]: Finished difference. Result has 423 places, 1327 transitions, 26662 flow [2024-01-27 15:51:43,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24287, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=976, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=26662, PETRI_PLACES=423, PETRI_TRANSITIONS=1327} [2024-01-27 15:51:43,778 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 392 predicate places. [2024-01-27 15:51:43,778 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 1327 transitions, 26662 flow [2024-01-27 15:51:43,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:43,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:43,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:43,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:43,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:43,992 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:51:43,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:43,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2031479966, now seen corresponding path program 3 times [2024-01-27 15:51:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:43,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293483312] [2024-01-27 15:51:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:43,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:44,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:44,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293483312] [2024-01-27 15:51:44,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293483312] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:44,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368448237] [2024-01-27 15:51:44,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:51:44,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:44,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:44,108 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:44,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-27 15:51:44,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:51:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:44,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:51:44,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:44,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:44,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368448237] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:44,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:44,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-27 15:51:44,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476141120] [2024-01-27 15:51:44,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:44,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:51:44,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:51:44,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:51:44,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:51:44,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 1327 transitions, 26662 flow. Second operand has 21 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 21 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:44,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:44,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:51:44,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:48,443 INFO L124 PetriNetUnfolderBase]: 7377/11185 cut-off events. [2024-01-27 15:51:48,443 INFO L125 PetriNetUnfolderBase]: For 357529/357529 co-relation queries the response was YES. [2024-01-27 15:51:48,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111226 conditions, 11185 events. 7377/11185 cut-off events. For 357529/357529 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 68690 event pairs, 1643 based on Foata normal form. 218/11403 useless extension candidates. Maximal degree in co-relation 110797. Up to 4367 conditions per place. [2024-01-27 15:51:48,568 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 1292 selfloop transitions, 295 changer transitions 7/1595 dead transitions. [2024-01-27 15:51:48,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1595 transitions, 33339 flow [2024-01-27 15:51:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:51:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:51:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 156 transitions. [2024-01-27 15:51:48,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-01-27 15:51:48,569 INFO L175 Difference]: Start difference. First operand has 423 places, 1327 transitions, 26662 flow. Second operand 12 states and 156 transitions. [2024-01-27 15:51:48,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1595 transitions, 33339 flow [2024-01-27 15:51:51,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1595 transitions, 32647 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-01-27 15:51:51,616 INFO L231 Difference]: Finished difference. Result has 428 places, 1284 transitions, 25731 flow [2024-01-27 15:51:51,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24941, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=25731, PETRI_PLACES=428, PETRI_TRANSITIONS=1284} [2024-01-27 15:51:51,617 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 397 predicate places. [2024-01-27 15:51:51,617 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 1284 transitions, 25731 flow [2024-01-27 15:51:51,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 21 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:51,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:51,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:51,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:51,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:51,834 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:51:51,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1658283596, now seen corresponding path program 4 times [2024-01-27 15:51:51,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:51,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37857683] [2024-01-27 15:51:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:51,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:51,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:51,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37857683] [2024-01-27 15:51:51,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37857683] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:51,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396229877] [2024-01-27 15:51:51,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:51:51,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:51,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:51,932 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:51,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-27 15:51:52,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:51:52,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:52,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:51:52,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:52,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:52,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396229877] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:52,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:52,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:51:52,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963023022] [2024-01-27 15:51:52,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:52,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:51:52,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:52,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:51:52,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:51:52,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:51:52,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1284 transitions, 25731 flow. Second operand has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:52,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:52,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:51:52,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:56,452 INFO L124 PetriNetUnfolderBase]: 7753/11731 cut-off events. [2024-01-27 15:51:56,452 INFO L125 PetriNetUnfolderBase]: For 355534/355534 co-relation queries the response was YES. [2024-01-27 15:51:56,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114697 conditions, 11731 events. 7753/11731 cut-off events. For 355534/355534 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 72324 event pairs, 1337 based on Foata normal form. 190/11921 useless extension candidates. Maximal degree in co-relation 114266. Up to 3652 conditions per place. [2024-01-27 15:51:56,586 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 1262 selfloop transitions, 276 changer transitions 9/1548 dead transitions. [2024-01-27 15:51:56,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1548 transitions, 32695 flow [2024-01-27 15:51:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:51:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:51:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-01-27 15:51:56,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46394984326018807 [2024-01-27 15:51:56,587 INFO L175 Difference]: Start difference. First operand has 428 places, 1284 transitions, 25731 flow. Second operand 11 states and 148 transitions. [2024-01-27 15:51:56,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1548 transitions, 32695 flow [2024-01-27 15:51:59,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1548 transitions, 31951 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-01-27 15:51:59,588 INFO L231 Difference]: Finished difference. Result has 434 places, 1353 transitions, 27686 flow [2024-01-27 15:51:59,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=25013, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=27686, PETRI_PLACES=434, PETRI_TRANSITIONS=1353} [2024-01-27 15:51:59,590 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 403 predicate places. [2024-01-27 15:51:59,590 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 1353 transitions, 27686 flow [2024-01-27 15:51:59,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:51:59,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:59,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:51:59,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-27 15:51:59,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-01-27 15:51:59,798 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:51:59,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:59,799 INFO L85 PathProgramCache]: Analyzing trace with hash -257974238, now seen corresponding path program 5 times [2024-01-27 15:51:59,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:59,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099159105] [2024-01-27 15:51:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:59,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:51:59,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:59,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099159105] [2024-01-27 15:51:59,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099159105] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:59,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900260914] [2024-01-27 15:51:59,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:51:59,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:59,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:59,916 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:59,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-27 15:52:00,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:52:00,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:00,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:52:00,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:52:00,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:52:00,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900260914] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:00,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:00,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 15:52:00,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592103090] [2024-01-27 15:52:00,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:00,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:52:00,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:52:00,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:52:00,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-01-27 15:52:00,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1353 transitions, 27686 flow. Second operand has 20 states, 20 states have (on average 6.15) internal successors, (123), 20 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:00,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:00,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-01-27 15:52:00,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand