./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-threaded-sum-3.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-threaded-sum-3.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 3ff96f1177b851e0082faef897c2fcf87c2462cab57ba2153c754c5e198aaf06 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:54:08,886 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:54:08,943 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:54:08,947 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:54:08,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:54:08,967 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:54:08,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:54:08,968 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:54:08,969 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:54:08,972 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:54:08,972 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:54:08,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:54:08,973 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:54:08,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:54:08,974 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:54:08,974 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:54:08,975 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:54:08,975 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:54:08,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:54:08,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:54:08,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:54:08,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:54:08,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:54:08,976 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:54:08,977 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:54:08,977 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:54:08,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:54:08,977 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:54:08,978 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:54:08,978 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:54:08,979 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:54:08,979 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:54:08,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:54:08,979 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:54:08,980 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:54:08,980 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:54:08,980 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:54:08,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:54:08,980 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:54:08,981 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:54:08,981 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:54:08,981 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:54:08,981 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:54:08,981 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ff96f1177b851e0082faef897c2fcf87c2462cab57ba2153c754c5e198aaf06 [2024-01-27 15:54:09,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:54:09,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:54:09,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:54:09,251 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:54:09,251 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:54:09,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c [2024-01-27 15:54:10,360 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:54:10,494 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:54:10,495 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c [2024-01-27 15:54:10,502 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/448371690/6f18c8f185ff47149dcde3aa123435f7/FLAGe61d1e2a9 [2024-01-27 15:54:10,514 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/448371690/6f18c8f185ff47149dcde3aa123435f7 [2024-01-27 15:54:10,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:54:10,518 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:54:10,519 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:54:10,519 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:54:10,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:54:10,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,527 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9bf886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10, skipping insertion in model container [2024-01-27 15:54:10,527 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,545 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:54:10,722 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-threaded-sum-3.wvr.c[2996,3009] [2024-01-27 15:54:10,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:54:10,736 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:54:10,753 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-threaded-sum-3.wvr.c[2996,3009] [2024-01-27 15:54:10,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:54:10,773 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:54:10,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10 WrapperNode [2024-01-27 15:54:10,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:54:10,774 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:54:10,774 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:54:10,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:54:10,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,785 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,798 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 83 [2024-01-27 15:54:10,799 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:54:10,800 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:54:10,800 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:54:10,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:54:10,808 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,811 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,822 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:54:10,822 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,822 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,827 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,831 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,832 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:54:10,835 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:54:10,835 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:54:10,835 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:54:10,836 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (1/1) ... [2024-01-27 15:54:10,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:54:10,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:10,866 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 15:54:10,868 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 15:54:10,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:54:10,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:54:10,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:54:10,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:54:10,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:54:10,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:54:10,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:54:10,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:54:10,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:54:10,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:54:10,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:54:10,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:54:10,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:54:10,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:54:10,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:54:10,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:54:10,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:54:10,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:54:10,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:54:10,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:54:10,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:54:10,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:54:10,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:54:10,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:54:10,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:54:10,913 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 15:54:11,056 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:54:11,057 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:54:11,253 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:54:11,253 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:54:11,412 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:54:11,412 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:54:11,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:54:11 BoogieIcfgContainer [2024-01-27 15:54:11,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:54:11,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:54:11,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:54:11,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:54:11,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:54:10" (1/3) ... [2024-01-27 15:54:11,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d39e7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:54:11, skipping insertion in model container [2024-01-27 15:54:11,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:10" (2/3) ... [2024-01-27 15:54:11,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d39e7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:54:11, skipping insertion in model container [2024-01-27 15:54:11,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:54:11" (3/3) ... [2024-01-27 15:54:11,420 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2024-01-27 15:54:11,427 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:54:11,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:54:11,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:54:11,434 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:54:11,469 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:54:11,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 37 transitions, 95 flow [2024-01-27 15:54:11,514 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2024-01-27 15:54:11,514 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:54:11,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 34 events. 3/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-01-27 15:54:11,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 37 transitions, 95 flow [2024-01-27 15:54:11,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 33 transitions, 84 flow [2024-01-27 15:54:11,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:54:11,536 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;@59af9a65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:54:11,538 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:54:11,547 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:54:11,551 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-01-27 15:54:11,551 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:54:11,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:11,552 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 15:54:11,552 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 15:54:11,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash -868197555, now seen corresponding path program 1 times [2024-01-27 15:54:11,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:11,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870962902] [2024-01-27 15:54:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:11,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:12,281 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 15:54:12,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:12,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870962902] [2024-01-27 15:54:12,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870962902] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:54:12,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:54:12,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:54:12,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691058346] [2024-01-27 15:54:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:54:12,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:54:12,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:12,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:54:12,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:54:12,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-27 15:54:12,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:12,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:12,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-27 15:54:12,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:12,599 INFO L124 PetriNetUnfolderBase]: 639/1041 cut-off events. [2024-01-27 15:54:12,600 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-01-27 15:54:12,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1999 conditions, 1041 events. 639/1041 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5105 event pairs, 45 based on Foata normal form. 40/1061 useless extension candidates. Maximal degree in co-relation 1878. Up to 614 conditions per place. [2024-01-27 15:54:12,614 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 46 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-01-27 15:54:12,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 274 flow [2024-01-27 15:54:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:54:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:54:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-01-27 15:54:12,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810810810810811 [2024-01-27 15:54:12,627 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 84 flow. Second operand 5 states and 126 transitions. [2024-01-27 15:54:12,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 274 flow [2024-01-27 15:54:12,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 65 transitions, 250 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:54:12,635 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 132 flow [2024-01-27 15:54:12,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2024-01-27 15:54:12,640 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2024-01-27 15:54:12,640 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 132 flow [2024-01-27 15:54:12,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:12,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:12,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:12,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:54:12,641 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 15:54:12,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1116351065, now seen corresponding path program 1 times [2024-01-27 15:54:12,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:12,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614859017] [2024-01-27 15:54:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:12,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:12,937 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 15:54:12,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614859017] [2024-01-27 15:54:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614859017] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:54:12,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:54:12,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:54:12,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355060647] [2024-01-27 15:54:12,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:54:12,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:54:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:54:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:54:12,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-27 15:54:12,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:12,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:12,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-27 15:54:12,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:13,121 INFO L124 PetriNetUnfolderBase]: 750/1225 cut-off events. [2024-01-27 15:54:13,122 INFO L125 PetriNetUnfolderBase]: For 1062/1095 co-relation queries the response was YES. [2024-01-27 15:54:13,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3147 conditions, 1225 events. 750/1225 cut-off events. For 1062/1095 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6336 event pairs, 121 based on Foata normal form. 57/1201 useless extension candidates. Maximal degree in co-relation 976. Up to 897 conditions per place. [2024-01-27 15:54:13,129 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 39 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2024-01-27 15:54:13,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 63 transitions, 317 flow [2024-01-27 15:54:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:54:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:54:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-01-27 15:54:13,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.668918918918919 [2024-01-27 15:54:13,131 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 132 flow. Second operand 4 states and 99 transitions. [2024-01-27 15:54:13,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 63 transitions, 317 flow [2024-01-27 15:54:13,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:54:13,133 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 200 flow [2024-01-27 15:54:13,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2024-01-27 15:54:13,134 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2024-01-27 15:54:13,134 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 200 flow [2024-01-27 15:54:13,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:13,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:13,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:13,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:54:13,135 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 15:54:13,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:13,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1753727731, now seen corresponding path program 1 times [2024-01-27 15:54:13,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:13,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661452525] [2024-01-27 15:54:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:13,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:13,296 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 15:54:13,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:13,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661452525] [2024-01-27 15:54:13,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661452525] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:54:13,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:54:13,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:54:13,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49003030] [2024-01-27 15:54:13,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:54:13,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:54:13,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:54:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:54:13,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-27 15:54:13,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:13,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:13,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-27 15:54:13,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:13,451 INFO L124 PetriNetUnfolderBase]: 966/1525 cut-off events. [2024-01-27 15:54:13,451 INFO L125 PetriNetUnfolderBase]: For 2535/2598 co-relation queries the response was YES. [2024-01-27 15:54:13,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4657 conditions, 1525 events. 966/1525 cut-off events. For 2535/2598 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7845 event pairs, 79 based on Foata normal form. 93/1548 useless extension candidates. Maximal degree in co-relation 3106. Up to 805 conditions per place. [2024-01-27 15:54:13,463 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 53 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-01-27 15:54:13,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 421 flow [2024-01-27 15:54:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:54:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:54:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-01-27 15:54:13,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.668918918918919 [2024-01-27 15:54:13,465 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 200 flow. Second operand 4 states and 99 transitions. [2024-01-27 15:54:13,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 421 flow [2024-01-27 15:54:13,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 421 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:54:13,468 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 214 flow [2024-01-27 15:54:13,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-01-27 15:54:13,469 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 9 predicate places. [2024-01-27 15:54:13,469 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 214 flow [2024-01-27 15:54:13,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:13,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:13,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:13,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:54:13,470 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 15:54:13,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1299444500, now seen corresponding path program 1 times [2024-01-27 15:54:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:13,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971174327] [2024-01-27 15:54:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:13,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:13,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:13,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971174327] [2024-01-27 15:54:13,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971174327] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:54:13,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:54:13,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:54:13,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829671253] [2024-01-27 15:54:13,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:54:13,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:54:13,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:54:13,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:54:13,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-27 15:54:13,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:13,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:13,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-27 15:54:13,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:13,897 INFO L124 PetriNetUnfolderBase]: 956/1537 cut-off events. [2024-01-27 15:54:13,897 INFO L125 PetriNetUnfolderBase]: For 2180/2352 co-relation queries the response was YES. [2024-01-27 15:54:13,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4909 conditions, 1537 events. 956/1537 cut-off events. For 2180/2352 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7948 event pairs, 154 based on Foata normal form. 134/1643 useless extension candidates. Maximal degree in co-relation 4143. Up to 782 conditions per place. [2024-01-27 15:54:13,908 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 64 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-01-27 15:54:13,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 87 transitions, 542 flow [2024-01-27 15:54:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:54:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:54:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-01-27 15:54:13,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6918918918918919 [2024-01-27 15:54:13,912 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 214 flow. Second operand 5 states and 128 transitions. [2024-01-27 15:54:13,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 87 transitions, 542 flow [2024-01-27 15:54:13,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 535 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:54:13,918 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 291 flow [2024-01-27 15:54:13,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-01-27 15:54:13,919 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 14 predicate places. [2024-01-27 15:54:13,919 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 291 flow [2024-01-27 15:54:13,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:13,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:13,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:13,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:54:13,920 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 15:54:13,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:13,921 INFO L85 PathProgramCache]: Analyzing trace with hash -547460900, now seen corresponding path program 1 times [2024-01-27 15:54:13,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:13,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857988486] [2024-01-27 15:54:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:13,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:14,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:14,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857988486] [2024-01-27 15:54:14,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857988486] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:14,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071119194] [2024-01-27 15:54:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:14,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:14,146 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 15:54:14,178 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 15:54:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:14,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:54:14,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:14,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:14,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071119194] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:14,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:14,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 9 [2024-01-27 15:54:14,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947523849] [2024-01-27 15:54:14,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:14,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:54:14,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:54:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:54:14,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-01-27 15:54:14,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 291 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:14,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:14,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-01-27 15:54:14,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:15,000 INFO L124 PetriNetUnfolderBase]: 3031/4655 cut-off events. [2024-01-27 15:54:15,000 INFO L125 PetriNetUnfolderBase]: For 9050/9325 co-relation queries the response was YES. [2024-01-27 15:54:15,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15191 conditions, 4655 events. 3031/4655 cut-off events. For 9050/9325 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 26545 event pairs, 316 based on Foata normal form. 285/4914 useless extension candidates. Maximal degree in co-relation 5679. Up to 1626 conditions per place. [2024-01-27 15:54:15,030 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 118 selfloop transitions, 34 changer transitions 0/159 dead transitions. [2024-01-27 15:54:15,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 159 transitions, 1069 flow [2024-01-27 15:54:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:54:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:54:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-01-27 15:54:15,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823095823095823 [2024-01-27 15:54:15,036 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 291 flow. Second operand 11 states and 237 transitions. [2024-01-27 15:54:15,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 159 transitions, 1069 flow [2024-01-27 15:54:15,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 159 transitions, 1057 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:54:15,047 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 545 flow [2024-01-27 15:54:15,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=545, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2024-01-27 15:54:15,048 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 28 predicate places. [2024-01-27 15:54:15,048 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 545 flow [2024-01-27 15:54:15,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:15,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:15,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:15,061 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 15:54:15,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:15,262 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 15:54:15,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:15,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1687074572, now seen corresponding path program 2 times [2024-01-27 15:54:15,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:15,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418838602] [2024-01-27 15:54:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:15,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:15,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:15,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418838602] [2024-01-27 15:54:15,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418838602] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:15,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533250729] [2024-01-27 15:54:15,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:54:15,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:15,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:15,441 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 15:54:15,458 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 15:54:15,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:54:15,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:15,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:54:15,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:15,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:15,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533250729] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:15,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:15,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 9 [2024-01-27 15:54:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298844990] [2024-01-27 15:54:15,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:15,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:54:15,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:15,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:54:15,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:54:15,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-01-27 15:54:15,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 545 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:15,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:15,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-01-27 15:54:15,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:16,356 INFO L124 PetriNetUnfolderBase]: 4068/5900 cut-off events. [2024-01-27 15:54:16,357 INFO L125 PetriNetUnfolderBase]: For 38907/39495 co-relation queries the response was YES. [2024-01-27 15:54:16,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27063 conditions, 5900 events. 4068/5900 cut-off events. For 38907/39495 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 32127 event pairs, 144 based on Foata normal form. 370/6165 useless extension candidates. Maximal degree in co-relation 11998. Up to 2035 conditions per place. [2024-01-27 15:54:16,470 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 146 selfloop transitions, 54 changer transitions 0/214 dead transitions. [2024-01-27 15:54:16,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 214 transitions, 1976 flow [2024-01-27 15:54:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:54:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:54:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 298 transitions. [2024-01-27 15:54:16,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033783783783784 [2024-01-27 15:54:16,472 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 545 flow. Second operand 16 states and 298 transitions. [2024-01-27 15:54:16,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 214 transitions, 1976 flow [2024-01-27 15:54:16,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 214 transitions, 1864 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-01-27 15:54:16,491 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 937 flow [2024-01-27 15:54:16,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=937, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2024-01-27 15:54:16,491 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-01-27 15:54:16,492 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 937 flow [2024-01-27 15:54:16,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:16,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:16,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:16,515 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 15:54:16,704 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,SelfDestructingSolverStorable5 [2024-01-27 15:54:16,704 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 15:54:16,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:16,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1194456954, now seen corresponding path program 3 times [2024-01-27 15:54:16,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:16,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791995464] [2024-01-27 15:54:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:16,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:17,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:17,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791995464] [2024-01-27 15:54:17,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791995464] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:17,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99857267] [2024-01-27 15:54:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:54:17,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:17,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:17,975 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 15:54:18,000 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 15:54:18,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:54:18,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:18,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:54:18,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:19,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:20,579 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 15:54:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99857267] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:20,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:20,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2024-01-27 15:54:20,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748191273] [2024-01-27 15:54:20,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:20,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:54:20,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:20,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:54:20,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:54:20,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:54:20,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 937 flow. Second operand has 30 states, 30 states have (on average 9.333333333333334) internal successors, (280), 30 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:20,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:20,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:54:20,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:23,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:54:50,102 INFO L124 PetriNetUnfolderBase]: 38073/54304 cut-off events. [2024-01-27 15:54:50,103 INFO L125 PetriNetUnfolderBase]: For 299708/299708 co-relation queries the response was YES. [2024-01-27 15:54:50,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255005 conditions, 54304 events. 38073/54304 cut-off events. For 299708/299708 co-relation queries the response was YES. Maximal size of possible extension queue 1937. Compared 357421 event pairs, 444 based on Foata normal form. 95/54398 useless extension candidates. Maximal degree in co-relation 177470. Up to 11771 conditions per place. [2024-01-27 15:54:50,637 INFO L140 encePairwiseOnDemand]: 21/37 looper letters, 1059 selfloop transitions, 775 changer transitions 383/2221 dead transitions. [2024-01-27 15:54:50,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 2221 transitions, 21840 flow [2024-01-27 15:54:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-01-27 15:54:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2024-01-27 15:54:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 2199 transitions. [2024-01-27 15:54:50,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4911771275407639 [2024-01-27 15:54:50,647 INFO L175 Difference]: Start difference. First operand has 89 places, 108 transitions, 937 flow. Second operand 121 states and 2199 transitions. [2024-01-27 15:54:50,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 2221 transitions, 21840 flow [2024-01-27 15:54:51,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 2221 transitions, 21396 flow, removed 189 selfloop flow, removed 1 redundant places. [2024-01-27 15:54:51,645 INFO L231 Difference]: Finished difference. Result has 283 places, 951 transitions, 12516 flow [2024-01-27 15:54:51,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=12516, PETRI_PLACES=283, PETRI_TRANSITIONS=951} [2024-01-27 15:54:51,646 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 243 predicate places. [2024-01-27 15:54:51,647 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 951 transitions, 12516 flow [2024-01-27 15:54:51,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.333333333333334) internal successors, (280), 30 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:51,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:51,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:51,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 15:54:51,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:51,859 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 15:54:51,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:51,859 INFO L85 PathProgramCache]: Analyzing trace with hash 588124742, now seen corresponding path program 4 times [2024-01-27 15:54:51,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:51,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689915407] [2024-01-27 15:54:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:51,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:52,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689915407] [2024-01-27 15:54:52,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689915407] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:54:52,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:54:52,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:54:52,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111703976] [2024-01-27 15:54:52,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:54:52,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:54:52,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:52,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:54:52,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:54:52,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-27 15:54:52,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 951 transitions, 12516 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:52,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:52,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-27 15:54:52,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:02,503 INFO L124 PetriNetUnfolderBase]: 28665/41877 cut-off events. [2024-01-27 15:55:02,504 INFO L125 PetriNetUnfolderBase]: For 1575966/1591888 co-relation queries the response was YES. [2024-01-27 15:55:03,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349942 conditions, 41877 events. 28665/41877 cut-off events. For 1575966/1591888 co-relation queries the response was YES. Maximal size of possible extension queue 1995. Compared 290324 event pairs, 1521 based on Foata normal form. 1780/42164 useless extension candidates. Maximal degree in co-relation 349713. Up to 12137 conditions per place. [2024-01-27 15:55:03,524 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 825 selfloop transitions, 232 changer transitions 0/1467 dead transitions. [2024-01-27 15:55:03,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 1467 transitions, 22197 flow [2024-01-27 15:55:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:55:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:55:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-01-27 15:55:03,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-01-27 15:55:03,525 INFO L175 Difference]: Start difference. First operand has 283 places, 951 transitions, 12516 flow. Second operand 7 states and 147 transitions. [2024-01-27 15:55:03,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 1467 transitions, 22197 flow [2024-01-27 15:55:14,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1467 transitions, 17004 flow, removed 2567 selfloop flow, removed 22 redundant places. [2024-01-27 15:55:14,514 INFO L231 Difference]: Finished difference. Result has 251 places, 1035 transitions, 11476 flow [2024-01-27 15:55:14,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=9583, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11476, PETRI_PLACES=251, PETRI_TRANSITIONS=1035} [2024-01-27 15:55:14,516 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 211 predicate places. [2024-01-27 15:55:14,516 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 1035 transitions, 11476 flow [2024-01-27 15:55:14,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:14,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:14,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:14,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:55:14,517 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 15:55:14,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:14,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2018486132, now seen corresponding path program 5 times [2024-01-27 15:55:14,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:14,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841807873] [2024-01-27 15:55:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:14,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:15,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:15,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841807873] [2024-01-27 15:55:15,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841807873] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:15,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549737350] [2024-01-27 15:55:15,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:55:15,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:15,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:15,598 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 15:55:15,599 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 15:55:15,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:15,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:15,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:55:15,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:16,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:28,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549737350] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:28,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:28,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 28 [2024-01-27 15:55:28,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209249524] [2024-01-27 15:55:28,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:28,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:55:28,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:55:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=621, Unknown=2, NotChecked=0, Total=812 [2024-01-27 15:55:32,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:55:36,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:55:40,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:55:42,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:55:42,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-01-27 15:55:42,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 1035 transitions, 11476 flow. Second operand has 29 states, 29 states have (on average 10.586206896551724) internal successors, (307), 29 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:42,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:42,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-01-27 15:55:42,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:02,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-27 15:56:28,902 INFO L124 PetriNetUnfolderBase]: 64176/92618 cut-off events. [2024-01-27 15:56:28,903 INFO L125 PetriNetUnfolderBase]: For 2712709/2713493 co-relation queries the response was YES. [2024-01-27 15:56:30,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710436 conditions, 92618 events. 64176/92618 cut-off events. For 2712709/2713493 co-relation queries the response was YES. Maximal size of possible extension queue 3923. Compared 675800 event pairs, 1435 based on Foata normal form. 793/93324 useless extension candidates. Maximal degree in co-relation 704032. Up to 19597 conditions per place. [2024-01-27 15:56:31,039 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 1498 selfloop transitions, 2122 changer transitions 788/4416 dead transitions. [2024-01-27 15:56:31,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 4416 transitions, 63614 flow [2024-01-27 15:56:31,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-01-27 15:56:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2024-01-27 15:56:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 1667 transitions. [2024-01-27 15:56:31,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119778869778869 [2024-01-27 15:56:31,044 INFO L175 Difference]: Start difference. First operand has 251 places, 1035 transitions, 11476 flow. Second operand 88 states and 1667 transitions. [2024-01-27 15:56:31,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 4416 transitions, 63614 flow [2024-01-27 15:57:27,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 4416 transitions, 62339 flow, removed 135 selfloop flow, removed 4 redundant places. [2024-01-27 15:57:27,599 INFO L231 Difference]: Finished difference. Result has 382 places, 2808 transitions, 40563 flow [2024-01-27 15:57:27,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=11262, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=40563, PETRI_PLACES=382, PETRI_TRANSITIONS=2808} [2024-01-27 15:57:27,601 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 342 predicate places. [2024-01-27 15:57:27,601 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 2808 transitions, 40563 flow [2024-01-27 15:57:27,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 10.586206896551724) internal successors, (307), 29 states have internal predecessors, (307), 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 15:57:27,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:27,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:27,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-27 15:57:27,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:27,817 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 15:57:27,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:27,817 INFO L85 PathProgramCache]: Analyzing trace with hash -55972612, now seen corresponding path program 1 times [2024-01-27 15:57:27,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:27,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478652247] [2024-01-27 15:57:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:27,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:57:28,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478652247] [2024-01-27 15:57:28,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478652247] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189000186] [2024-01-27 15:57:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:28,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:28,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:28,165 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 15:57:28,166 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 15:57:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:28,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:57:28,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:57:28,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:57:29,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189000186] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:29,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:29,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2024-01-27 15:57:29,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941659743] [2024-01-27 15:57:29,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:29,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:57:29,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:57:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:57:29,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-01-27 15:57:29,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 2808 transitions, 40563 flow. Second operand has 20 states, 20 states have (on average 12.85) internal successors, (257), 20 states have internal predecessors, (257), 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 15:57:29,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:29,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-01-27 15:57:29,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:38,950 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 34 DAG size of output: 27 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:57:55,246 WARN L293 SmtUtils]: Spent 12.07s on a formula simplification. DAG size of input: 66 DAG size of output: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:58:12,602 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 30 DAG size of output: 23 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)