./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-mts.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 cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:46:42,107 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:46:42,167 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:46:42,172 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:46:42,172 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:46:42,195 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:46:42,199 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:46:42,199 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:46:42,200 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:46:42,203 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:46:42,203 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:46:42,203 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:46:42,204 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:46:42,205 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:46:42,205 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:46:42,205 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:46:42,206 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:46:42,206 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:46:42,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:46:42,206 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:46:42,207 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:46:42,207 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:46:42,208 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:46:42,208 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:46:42,208 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:46:42,208 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:46:42,208 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:46:42,209 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:46:42,209 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:46:42,209 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:46:42,210 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:46:42,210 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:46:42,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:46:42,211 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:46:42,211 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:46:42,211 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:46:42,211 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:46:42,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:46:42,212 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:46:42,212 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:46:42,212 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:46:42,212 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:46:42,212 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:46:42,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2024-01-27 15:46:42,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:46:42,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:46:42,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:46:42,474 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:46:42,475 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:46:42,476 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2024-01-27 15:46:43,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:46:43,676 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:46:43,677 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c [2024-01-27 15:46:43,688 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e451ca250/3419c962174e44c7a19b7b5e245e0289/FLAG198ea7ecf [2024-01-27 15:46:43,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e451ca250/3419c962174e44c7a19b7b5e245e0289 [2024-01-27 15:46:43,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:46:43,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:46:43,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:46:43,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:46:43,713 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:46:43,713 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:43,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@399e21c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43, skipping insertion in model container [2024-01-27 15:46:43,714 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:43,745 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:46:43,894 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c[2572,2585] [2024-01-27 15:46:43,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:46:43,912 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:46:43,932 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-mts.wvr.c[2572,2585] [2024-01-27 15:46:43,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:46:43,951 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:46:43,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43 WrapperNode [2024-01-27 15:46:43,952 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:46:43,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:46:43,957 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:46:43,957 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:46:43,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:43,969 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:43,990 INFO L138 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 234 [2024-01-27 15:46:43,990 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:46:43,991 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:46:43,991 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:46:43,991 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:46:44,000 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:44,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:44,003 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:44,016 INFO L175 MemorySlicer]: Split 16 memory accesses to 5 slices as follows [2, 8, 2, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-27 15:46:44,016 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:44,017 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:44,023 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:44,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:44,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:44,029 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:44,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:46:44,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:46:44,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:46:44,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:46:44,033 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (1/1) ... [2024-01-27 15:46:44,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:46:44,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:44,072 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 15:46:44,090 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 15:46:44,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:46:44,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:46:44,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:46:44,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:46:44,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:46:44,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:46:44,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:46:44,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:46:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:46:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:46:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:46:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:46:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:46:44,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:46:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:46:44,111 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:46:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:46:44,111 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:46:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:46:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:46:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:46:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:46:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:46:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:46:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:46:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:46:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:46:44,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:46:44,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:46:44,113 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 15:46:44,223 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:46:44,246 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:46:44,600 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:46:44,603 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:46:44,866 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:46:44,866 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:46:44,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:46:44 BoogieIcfgContainer [2024-01-27 15:46:44,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:46:44,868 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:46:44,868 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:46:44,871 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:46:44,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:46:43" (1/3) ... [2024-01-27 15:46:44,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ffb442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:46:44, skipping insertion in model container [2024-01-27 15:46:44,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:46:43" (2/3) ... [2024-01-27 15:46:44,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ffb442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:46:44, skipping insertion in model container [2024-01-27 15:46:44,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:46:44" (3/3) ... [2024-01-27 15:46:44,873 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2024-01-27 15:46:44,880 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:46:44,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:46:44,888 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:46:44,888 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:46:44,940 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:46:44,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 83 flow [2024-01-27 15:46:45,001 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-01-27 15:46:45,002 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:46:45,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 4/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-01-27 15:46:45,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 31 transitions, 83 flow [2024-01-27 15:46:45,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 72 flow [2024-01-27 15:46:45,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:46:45,029 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;@7a34b5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:46:45,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:46:45,041 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:46:45,041 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-01-27 15:46:45,041 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:46:45,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:45,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:45,043 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 15:46:45,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:45,048 INFO L85 PathProgramCache]: Analyzing trace with hash -524449101, now seen corresponding path program 1 times [2024-01-27 15:46:45,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974269575] [2024-01-27 15:46:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:45,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:45,511 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 15:46:45,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:45,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974269575] [2024-01-27 15:46:45,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974269575] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:46:45,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:46:45,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:46:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116643996] [2024-01-27 15:46:45,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:46:45,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:46:45,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:45,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:46:45,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:46:45,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-27 15:46:45,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 15:46:45,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:45,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-27 15:46:45,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:45,745 INFO L124 PetriNetUnfolderBase]: 488/738 cut-off events. [2024-01-27 15:46:45,746 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-01-27 15:46:45,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 738 events. 488/738 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2605 event pairs, 138 based on Foata normal form. 1/612 useless extension candidates. Maximal degree in co-relation 1176. Up to 474 conditions per place. [2024-01-27 15:46:45,755 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 39 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2024-01-27 15:46:45,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 213 flow [2024-01-27 15:46:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:46:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:46:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-01-27 15:46:45,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-01-27 15:46:45,767 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 72 flow. Second operand 3 states and 60 transitions. [2024-01-27 15:46:45,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 213 flow [2024-01-27 15:46:45,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 191 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:46:45,774 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 86 flow [2024-01-27 15:46:45,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2024-01-27 15:46:45,779 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2024-01-27 15:46:45,779 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 86 flow [2024-01-27 15:46:45,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 15:46:45,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:45,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:45,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:46:45,781 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 15:46:45,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1014919779, now seen corresponding path program 1 times [2024-01-27 15:46:45,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:45,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208652359] [2024-01-27 15:46:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:45,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:45,922 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 15:46:45,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:45,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208652359] [2024-01-27 15:46:45,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208652359] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:46:45,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:46:45,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:46:45,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575057948] [2024-01-27 15:46:45,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:46:45,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:46:45,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:45,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:46:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:46:45,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-27 15:46:45,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:46:45,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:45,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-27 15:46:45,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:46,038 INFO L124 PetriNetUnfolderBase]: 488/755 cut-off events. [2024-01-27 15:46:46,039 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-01-27 15:46:46,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 755 events. 488/755 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2657 event pairs, 321 based on Foata normal form. 0/754 useless extension candidates. Maximal degree in co-relation 557. Up to 718 conditions per place. [2024-01-27 15:46:46,042 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 27 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-01-27 15:46:46,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 146 flow [2024-01-27 15:46:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:46:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:46:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-01-27 15:46:46,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-01-27 15:46:46,046 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 86 flow. Second operand 3 states and 42 transitions. [2024-01-27 15:46:46,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 146 flow [2024-01-27 15:46:46,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:46:46,051 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 94 flow [2024-01-27 15:46:46,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2024-01-27 15:46:46,052 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2024-01-27 15:46:46,052 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 94 flow [2024-01-27 15:46:46,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:46:46,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:46,053 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 15:46:46,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:46:46,057 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 15:46:46,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash 93359912, now seen corresponding path program 1 times [2024-01-27 15:46:46,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:46,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565675844] [2024-01-27 15:46:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:46,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:46:46,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:46,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565675844] [2024-01-27 15:46:46,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565675844] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:46:46,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:46:46,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:46:46,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901067825] [2024-01-27 15:46:46,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:46:46,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:46:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:46,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:46:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:46:46,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:46:46,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 15:46:46,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:46,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:46:46,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:46,311 INFO L124 PetriNetUnfolderBase]: 601/881 cut-off events. [2024-01-27 15:46:46,311 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-01-27 15:46:46,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 881 events. 601/881 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2850 event pairs, 186 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 1989. Up to 468 conditions per place. [2024-01-27 15:46:46,315 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 40 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-01-27 15:46:46,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 220 flow [2024-01-27 15:46:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:46:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:46:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2024-01-27 15:46:46,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2024-01-27 15:46:46,317 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 94 flow. Second operand 4 states and 55 transitions. [2024-01-27 15:46:46,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 220 flow [2024-01-27 15:46:46,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 214 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:46:46,319 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 109 flow [2024-01-27 15:46:46,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-01-27 15:46:46,321 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2024-01-27 15:46:46,321 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 109 flow [2024-01-27 15:46:46,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 15:46:46,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:46,321 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] [2024-01-27 15:46:46,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:46:46,321 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 15:46:46,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:46,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1732050716, now seen corresponding path program 1 times [2024-01-27 15:46:46,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:46,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425470183] [2024-01-27 15:46:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:46,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:46:46,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:46,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425470183] [2024-01-27 15:46:46,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425470183] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:46,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189085388] [2024-01-27 15:46:46,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:46,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:46,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:46,405 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 15:46:46,417 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 15:46:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:46,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:46:46,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:46:46,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:46:46,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189085388] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:46,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:46:46,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-01-27 15:46:46,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235982302] [2024-01-27 15:46:46,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:46:46,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:46:46,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:46,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:46:46,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:46:46,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-27 15:46:46,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 15:46:46,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:46,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-27 15:46:46,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:46,742 INFO L124 PetriNetUnfolderBase]: 472/718 cut-off events. [2024-01-27 15:46:46,742 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2024-01-27 15:46:46,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 718 events. 472/718 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2400 event pairs, 222 based on Foata normal form. 50/768 useless extension candidates. Maximal degree in co-relation 1844. Up to 513 conditions per place. [2024-01-27 15:46:46,745 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 39 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-01-27 15:46:46,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 249 flow [2024-01-27 15:46:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:46:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:46:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-01-27 15:46:46,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-01-27 15:46:46,747 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 109 flow. Second operand 5 states and 65 transitions. [2024-01-27 15:46:46,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 249 flow [2024-01-27 15:46:46,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:46:46,749 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 126 flow [2024-01-27 15:46:46,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-01-27 15:46:46,749 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2024-01-27 15:46:46,750 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 126 flow [2024-01-27 15:46:46,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 15:46:46,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:46,750 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 15:46:46,763 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 15:46:46,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:46,961 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 15:46:46,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1255150857, now seen corresponding path program 1 times [2024-01-27 15:46:46,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:46,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116198669] [2024-01-27 15:46:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:46,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:47,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:47,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116198669] [2024-01-27 15:46:47,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116198669] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:47,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352873146] [2024-01-27 15:46:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:47,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:47,959 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 15:46:47,960 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 15:46:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:48,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:46:48,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:48,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:46:48,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 37 [2024-01-27 15:46:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:48,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:49,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2024-01-27 15:46:49,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:46:49,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 124 [2024-01-27 15:46:50,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 416 treesize of output 376 [2024-01-27 15:46:50,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:46:50,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 691 treesize of output 675 [2024-01-27 15:47:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352873146] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:01,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:01,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 15:47:01,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773357896] [2024-01-27 15:47:01,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:01,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:47:01,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:01,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:47:01,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:47:01,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-27 15:47:01,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 126 flow. Second operand has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 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 15:47:01,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:01,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-27 15:47:01,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:02,341 INFO L124 PetriNetUnfolderBase]: 865/1356 cut-off events. [2024-01-27 15:47:02,342 INFO L125 PetriNetUnfolderBase]: For 915/933 co-relation queries the response was YES. [2024-01-27 15:47:02,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 1356 events. 865/1356 cut-off events. For 915/933 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5652 event pairs, 58 based on Foata normal form. 19/1375 useless extension candidates. Maximal degree in co-relation 2882. Up to 765 conditions per place. [2024-01-27 15:47:02,349 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 81 selfloop transitions, 23 changer transitions 1/108 dead transitions. [2024-01-27 15:47:02,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 108 transitions, 574 flow [2024-01-27 15:47:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-01-27 15:47:02,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 15:47:02,353 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 126 flow. Second operand 10 states and 155 transitions. [2024-01-27 15:47:02,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 108 transitions, 574 flow [2024-01-27 15:47:02,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 108 transitions, 558 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-01-27 15:47:02,359 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 274 flow [2024-01-27 15:47:02,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=274, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2024-01-27 15:47:02,361 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2024-01-27 15:47:02,361 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 274 flow [2024-01-27 15:47:02,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 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 15:47:02,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:02,362 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 15:47:02,378 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 15:47:02,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:02,572 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 15:47:02,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:02,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1098108613, now seen corresponding path program 2 times [2024-01-27 15:47:02,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:02,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971595812] [2024-01-27 15:47:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:02,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:03,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971595812] [2024-01-27 15:47:03,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971595812] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379631725] [2024-01-27 15:47:03,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:47:03,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:03,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:03,161 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 15:47:03,162 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 15:47:03,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:47:03,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:03,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:47:03,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:03,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:47:03,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 38 [2024-01-27 15:47:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:03,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:04,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2024-01-27 15:47:04,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:47:04,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 124 [2024-01-27 15:47:04,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 219 [2024-01-27 15:47:04,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:47:04,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 359 treesize of output 373 [2024-01-27 15:47:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:06,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379631725] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:06,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:06,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-01-27 15:47:06,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477665597] [2024-01-27 15:47:06,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:06,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:47:06,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:06,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:47:06,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:47:06,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:47:06,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 274 flow. Second operand has 24 states, 24 states have (on average 7.125) internal successors, (171), 24 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:06,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:06,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:47:06,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:07,289 INFO L124 PetriNetUnfolderBase]: 1425/2075 cut-off events. [2024-01-27 15:47:07,290 INFO L125 PetriNetUnfolderBase]: For 2228/2228 co-relation queries the response was YES. [2024-01-27 15:47:07,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6634 conditions, 2075 events. 1425/2075 cut-off events. For 2228/2228 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8111 event pairs, 222 based on Foata normal form. 1/2076 useless extension candidates. Maximal degree in co-relation 5692. Up to 1510 conditions per place. [2024-01-27 15:47:07,300 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 88 selfloop transitions, 29 changer transitions 1/119 dead transitions. [2024-01-27 15:47:07,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 119 transitions, 767 flow [2024-01-27 15:47:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-01-27 15:47:07,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-01-27 15:47:07,302 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 274 flow. Second operand 10 states and 140 transitions. [2024-01-27 15:47:07,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 119 transitions, 767 flow [2024-01-27 15:47:07,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 119 transitions, 720 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-01-27 15:47:07,306 INFO L231 Difference]: Finished difference. Result has 61 places, 68 transitions, 448 flow [2024-01-27 15:47:07,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=61, PETRI_TRANSITIONS=68} [2024-01-27 15:47:07,307 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 28 predicate places. [2024-01-27 15:47:07,307 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 68 transitions, 448 flow [2024-01-27 15:47:07,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.125) internal successors, (171), 24 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:07,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:07,308 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 15:47:07,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:07,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:07,521 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 15:47:07,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash -694250809, now seen corresponding path program 3 times [2024-01-27 15:47:07,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:07,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838618903] [2024-01-27 15:47:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:07,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:08,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:08,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838618903] [2024-01-27 15:47:08,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838618903] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:08,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763755038] [2024-01-27 15:47:08,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:47:08,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:08,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:08,173 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 15:47:08,200 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 15:47:08,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:47:08,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:08,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:47:08,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:08,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:47:08,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:47:08,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 81 [2024-01-27 15:47:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:08,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:10,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2024-01-27 15:47:10,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 84 [2024-01-27 15:47:10,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-01-27 15:47:10,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-01-27 15:47:10,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2024-01-27 15:47:10,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 60 [2024-01-27 15:47:10,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2024-01-27 15:47:10,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 71 [2024-01-27 15:47:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:10,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763755038] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:10,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:10,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2024-01-27 15:47:10,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744958616] [2024-01-27 15:47:10,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:10,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:47:10,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:47:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:47:10,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:47:10,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 68 transitions, 448 flow. Second operand has 28 states, 28 states have (on average 6.678571428571429) internal successors, (187), 28 states have internal predecessors, (187), 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 15:47:10,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:10,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:47:10,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:11,677 INFO L124 PetriNetUnfolderBase]: 2015/2923 cut-off events. [2024-01-27 15:47:11,677 INFO L125 PetriNetUnfolderBase]: For 4058/4058 co-relation queries the response was YES. [2024-01-27 15:47:11,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10114 conditions, 2923 events. 2015/2923 cut-off events. For 4058/4058 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12394 event pairs, 260 based on Foata normal form. 2/2925 useless extension candidates. Maximal degree in co-relation 9233. Up to 1981 conditions per place. [2024-01-27 15:47:11,694 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 142 selfloop transitions, 50 changer transitions 2/195 dead transitions. [2024-01-27 15:47:11,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 195 transitions, 1364 flow [2024-01-27 15:47:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:47:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:47:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 242 transitions. [2024-01-27 15:47:11,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-01-27 15:47:11,696 INFO L175 Difference]: Start difference. First operand has 61 places, 68 transitions, 448 flow. Second operand 18 states and 242 transitions. [2024-01-27 15:47:11,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 195 transitions, 1364 flow [2024-01-27 15:47:11,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 195 transitions, 1347 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-27 15:47:11,703 INFO L231 Difference]: Finished difference. Result has 81 places, 97 transitions, 792 flow [2024-01-27 15:47:11,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=792, PETRI_PLACES=81, PETRI_TRANSITIONS=97} [2024-01-27 15:47:11,704 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2024-01-27 15:47:11,704 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 97 transitions, 792 flow [2024-01-27 15:47:11,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.678571428571429) internal successors, (187), 28 states have internal predecessors, (187), 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 15:47:11,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:11,704 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 15:47:11,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:11,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:11,915 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 15:47:11,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1235581127, now seen corresponding path program 4 times [2024-01-27 15:47:11,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:11,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204149150] [2024-01-27 15:47:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:11,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:12,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:12,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204149150] [2024-01-27 15:47:12,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204149150] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:12,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552808147] [2024-01-27 15:47:12,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:47:12,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:12,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:12,453 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 15:47:12,453 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 15:47:12,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:47:12,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:12,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:47:12,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:12,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:47:12,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 38 [2024-01-27 15:47:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:12,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:13,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 219 [2024-01-27 15:47:13,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:47:13,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 359 treesize of output 373 [2024-01-27 15:47:28,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2024-01-27 15:47:28,492 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-01-27 15:47:28,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 1 [2024-01-27 15:47:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:28,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552808147] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:28,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:28,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-01-27 15:47:28,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087311993] [2024-01-27 15:47:28,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:28,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:47:28,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:28,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:47:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:47:28,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:47:28,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 97 transitions, 792 flow. Second operand has 24 states, 24 states have (on average 7.125) internal successors, (171), 24 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:28,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:28,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:47:28,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:29,443 INFO L124 PetriNetUnfolderBase]: 2191/3180 cut-off events. [2024-01-27 15:47:29,443 INFO L125 PetriNetUnfolderBase]: For 6890/6890 co-relation queries the response was YES. [2024-01-27 15:47:29,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12173 conditions, 3180 events. 2191/3180 cut-off events. For 6890/6890 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13606 event pairs, 431 based on Foata normal form. 1/3181 useless extension candidates. Maximal degree in co-relation 11528. Up to 2595 conditions per place. [2024-01-27 15:47:29,462 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 116 selfloop transitions, 32 changer transitions 1/150 dead transitions. [2024-01-27 15:47:29,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 150 transitions, 1283 flow [2024-01-27 15:47:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:47:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:47:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-01-27 15:47:29,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46953405017921146 [2024-01-27 15:47:29,463 INFO L175 Difference]: Start difference. First operand has 81 places, 97 transitions, 792 flow. Second operand 9 states and 131 transitions. [2024-01-27 15:47:29,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 150 transitions, 1283 flow [2024-01-27 15:47:29,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 150 transitions, 1133 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-01-27 15:47:29,473 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 783 flow [2024-01-27 15:47:29,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=783, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-01-27 15:47:29,474 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 53 predicate places. [2024-01-27 15:47:29,474 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 783 flow [2024-01-27 15:47:29,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.125) internal successors, (171), 24 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:29,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:29,475 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 15:47:29,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:29,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:29,690 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 15:47:29,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1018813069, now seen corresponding path program 5 times [2024-01-27 15:47:29,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:29,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042464273] [2024-01-27 15:47:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:29,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:30,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:30,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042464273] [2024-01-27 15:47:30,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042464273] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:30,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345470743] [2024-01-27 15:47:30,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:47:30,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:30,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:30,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:30,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:47:30,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:47:30,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:30,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:47:30,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:30,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:47:30,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:47:30,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 81 [2024-01-27 15:47:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:30,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:32,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-01-27 15:47:32,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-01-27 15:47:32,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 66 [2024-01-27 15:47:32,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 81 [2024-01-27 15:47:32,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2024-01-27 15:47:32,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 60 [2024-01-27 15:47:33,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2024-01-27 15:47:33,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 115 [2024-01-27 15:47:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:33,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345470743] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:33,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:33,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2024-01-27 15:47:33,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450559336] [2024-01-27 15:47:33,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:33,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:47:33,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:47:33,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:47:33,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:47:33,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 783 flow. Second operand has 27 states, 27 states have (on average 6.777777777777778) internal successors, (183), 27 states have internal predecessors, (183), 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 15:47:33,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:33,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:47:33,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:35,486 INFO L124 PetriNetUnfolderBase]: 3343/4802 cut-off events. [2024-01-27 15:47:35,487 INFO L125 PetriNetUnfolderBase]: For 11623/11623 co-relation queries the response was YES. [2024-01-27 15:47:35,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18157 conditions, 4802 events. 3343/4802 cut-off events. For 11623/11623 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21949 event pairs, 294 based on Foata normal form. 2/4804 useless extension candidates. Maximal degree in co-relation 17622. Up to 3182 conditions per place. [2024-01-27 15:47:35,516 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 211 selfloop transitions, 131 changer transitions 2/345 dead transitions. [2024-01-27 15:47:35,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 345 transitions, 2671 flow [2024-01-27 15:47:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:47:35,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:47:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 411 transitions. [2024-01-27 15:47:35,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3899430740037951 [2024-01-27 15:47:35,518 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 783 flow. Second operand 34 states and 411 transitions. [2024-01-27 15:47:35,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 345 transitions, 2671 flow [2024-01-27 15:47:35,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 345 transitions, 2615 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-01-27 15:47:35,542 INFO L231 Difference]: Finished difference. Result has 125 places, 197 transitions, 1900 flow [2024-01-27 15:47:35,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1900, PETRI_PLACES=125, PETRI_TRANSITIONS=197} [2024-01-27 15:47:35,543 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 92 predicate places. [2024-01-27 15:47:35,543 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 197 transitions, 1900 flow [2024-01-27 15:47:35,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.777777777777778) internal successors, (183), 27 states have internal predecessors, (183), 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 15:47:35,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:35,545 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 15:47:35,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:35,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:35,756 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 15:47:35,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 812051853, now seen corresponding path program 6 times [2024-01-27 15:47:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:35,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753139698] [2024-01-27 15:47:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:35,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:36,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:36,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753139698] [2024-01-27 15:47:36,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753139698] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:36,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596150328] [2024-01-27 15:47:36,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:47:36,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:36,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:36,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:36,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:47:36,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:47:36,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:36,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:47:36,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:36,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:47:36,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 38 [2024-01-27 15:47:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:36,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:37,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 108 [2024-01-27 15:47:37,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:47:37,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 143 [2024-01-27 15:47:38,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2024-01-27 15:47:38,308 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-27 15:47:38,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-01-27 15:47:38,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 227 [2024-01-27 15:47:38,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:47:38,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 423 treesize of output 387 [2024-01-27 15:47:39,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 165 [2024-01-27 15:47:39,663 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-01-27 15:47:39,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 291 treesize of output 1 [2024-01-27 15:47:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:39,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596150328] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:39,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:39,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2024-01-27 15:47:39,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897149704] [2024-01-27 15:47:39,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:39,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:47:39,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:39,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:47:39,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:47:39,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:47:39,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 197 transitions, 1900 flow. Second operand has 22 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:39,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:39,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:47:39,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:40,776 INFO L124 PetriNetUnfolderBase]: 3528/5074 cut-off events. [2024-01-27 15:47:40,776 INFO L125 PetriNetUnfolderBase]: For 26367/26367 co-relation queries the response was YES. [2024-01-27 15:47:40,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23447 conditions, 5074 events. 3528/5074 cut-off events. For 26367/26367 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23398 event pairs, 598 based on Foata normal form. 1/5075 useless extension candidates. Maximal degree in co-relation 22744. Up to 4529 conditions per place. [2024-01-27 15:47:40,808 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 207 selfloop transitions, 45 changer transitions 1/254 dead transitions. [2024-01-27 15:47:40,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 254 transitions, 2672 flow [2024-01-27 15:47:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:47:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:47:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-01-27 15:47:40,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-01-27 15:47:40,810 INFO L175 Difference]: Start difference. First operand has 125 places, 197 transitions, 1900 flow. Second operand 11 states and 146 transitions. [2024-01-27 15:47:40,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 254 transitions, 2672 flow [2024-01-27 15:47:40,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 254 transitions, 2115 flow, removed 240 selfloop flow, removed 13 redundant places. [2024-01-27 15:47:40,871 INFO L231 Difference]: Finished difference. Result has 126 places, 206 transitions, 1604 flow [2024-01-27 15:47:40,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1604, PETRI_PLACES=126, PETRI_TRANSITIONS=206} [2024-01-27 15:47:40,871 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 93 predicate places. [2024-01-27 15:47:40,872 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 206 transitions, 1604 flow [2024-01-27 15:47:40,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:40,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:40,872 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:40,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:41,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:41,074 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:41,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:41,074 INFO L85 PathProgramCache]: Analyzing trace with hash 551284846, now seen corresponding path program 7 times [2024-01-27 15:47:41,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:41,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029566765] [2024-01-27 15:47:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:41,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029566765] [2024-01-27 15:47:41,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029566765] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134967941] [2024-01-27 15:47:41,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:47:41,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:41,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:41,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:41,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:47:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:41,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:47:41,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:41,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:41,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134967941] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:41,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:41,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:47:41,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878300534] [2024-01-27 15:47:41,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:41,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:47:41,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:41,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:47:41,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:47:41,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-27 15:47:41,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 206 transitions, 1604 flow. Second operand has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:41,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:41,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-27 15:47:41,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:41,909 INFO L124 PetriNetUnfolderBase]: 3052/4720 cut-off events. [2024-01-27 15:47:41,909 INFO L125 PetriNetUnfolderBase]: For 28362/28598 co-relation queries the response was YES. [2024-01-27 15:47:41,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20736 conditions, 4720 events. 3052/4720 cut-off events. For 28362/28598 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25359 event pairs, 1100 based on Foata normal form. 224/4942 useless extension candidates. Maximal degree in co-relation 20148. Up to 1580 conditions per place. [2024-01-27 15:47:41,935 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 231 selfloop transitions, 45 changer transitions 0/281 dead transitions. [2024-01-27 15:47:41,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 281 transitions, 2689 flow [2024-01-27 15:47:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:47:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:47:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-01-27 15:47:41,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069124423963134 [2024-01-27 15:47:41,937 INFO L175 Difference]: Start difference. First operand has 126 places, 206 transitions, 1604 flow. Second operand 7 states and 110 transitions. [2024-01-27 15:47:41,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 281 transitions, 2689 flow [2024-01-27 15:47:41,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 281 transitions, 2618 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-01-27 15:47:41,982 INFO L231 Difference]: Finished difference. Result has 130 places, 200 transitions, 1673 flow [2024-01-27 15:47:41,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1673, PETRI_PLACES=130, PETRI_TRANSITIONS=200} [2024-01-27 15:47:41,983 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 97 predicate places. [2024-01-27 15:47:41,983 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 200 transitions, 1673 flow [2024-01-27 15:47:41,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:41,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:41,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:41,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:42,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-27 15:47:42,195 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:42,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:42,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1267648643, now seen corresponding path program 8 times [2024-01-27 15:47:42,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:42,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404873651] [2024-01-27 15:47:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:42,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404873651] [2024-01-27 15:47:42,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404873651] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:42,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621198326] [2024-01-27 15:47:42,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:47:42,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:42,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:42,284 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:42,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:47:42,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:47:42,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:42,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:47:42,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:42,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:42,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621198326] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:42,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:42,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2024-01-27 15:47:42,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90148538] [2024-01-27 15:47:42,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:42,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:47:42,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:47:42,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:47:42,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:47:42,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 200 transitions, 1673 flow. Second operand has 19 states, 19 states have (on average 7.105263157894737) internal successors, (135), 19 states have internal predecessors, (135), 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 15:47:42,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:42,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:47:42,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:43,829 INFO L124 PetriNetUnfolderBase]: 4400/6487 cut-off events. [2024-01-27 15:47:43,830 INFO L125 PetriNetUnfolderBase]: For 43417/43417 co-relation queries the response was YES. [2024-01-27 15:47:43,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30928 conditions, 6487 events. 4400/6487 cut-off events. For 43417/43417 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33336 event pairs, 965 based on Foata normal form. 166/6653 useless extension candidates. Maximal degree in co-relation 30851. Up to 2027 conditions per place. [2024-01-27 15:47:43,875 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 379 selfloop transitions, 210 changer transitions 0/590 dead transitions. [2024-01-27 15:47:43,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 590 transitions, 6043 flow [2024-01-27 15:47:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:47:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:47:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 385 transitions. [2024-01-27 15:47:43,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2024-01-27 15:47:43,877 INFO L175 Difference]: Start difference. First operand has 130 places, 200 transitions, 1673 flow. Second operand 30 states and 385 transitions. [2024-01-27 15:47:43,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 590 transitions, 6043 flow [2024-01-27 15:47:44,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 590 transitions, 6022 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-01-27 15:47:44,061 INFO L231 Difference]: Finished difference. Result has 170 places, 370 transitions, 4090 flow [2024-01-27 15:47:44,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4090, PETRI_PLACES=170, PETRI_TRANSITIONS=370} [2024-01-27 15:47:44,062 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 137 predicate places. [2024-01-27 15:47:44,062 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 370 transitions, 4090 flow [2024-01-27 15:47:44,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.105263157894737) internal successors, (135), 19 states have internal predecessors, (135), 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 15:47:44,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:44,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:44,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-27 15:47:44,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:44,275 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:44,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1345672519, now seen corresponding path program 1 times [2024-01-27 15:47:44,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:44,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765444370] [2024-01-27 15:47:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:47:44,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:44,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765444370] [2024-01-27 15:47:44,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765444370] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:44,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180118186] [2024-01-27 15:47:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:44,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:44,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:44,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:44,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:47:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:44,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:47:44,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:47:44,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:47:44,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180118186] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:44,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:44,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-01-27 15:47:44,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066320852] [2024-01-27 15:47:44,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:44,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:47:44,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:47:44,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:47:44,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-27 15:47:44,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 370 transitions, 4090 flow. Second operand has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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 15:47:44,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:44,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-27 15:47:44,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:45,261 INFO L124 PetriNetUnfolderBase]: 3284/5200 cut-off events. [2024-01-27 15:47:45,261 INFO L125 PetriNetUnfolderBase]: For 73995/74039 co-relation queries the response was YES. [2024-01-27 15:47:45,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32533 conditions, 5200 events. 3284/5200 cut-off events. For 73995/74039 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29660 event pairs, 1198 based on Foata normal form. 276/5475 useless extension candidates. Maximal degree in co-relation 31826. Up to 2301 conditions per place. [2024-01-27 15:47:45,303 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 377 selfloop transitions, 7 changer transitions 12/425 dead transitions. [2024-01-27 15:47:45,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 425 transitions, 5442 flow [2024-01-27 15:47:45,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:47:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:47:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-01-27 15:47:45,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946236559139785 [2024-01-27 15:47:45,305 INFO L175 Difference]: Start difference. First operand has 170 places, 370 transitions, 4090 flow. Second operand 6 states and 92 transitions. [2024-01-27 15:47:45,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 425 transitions, 5442 flow [2024-01-27 15:47:45,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 425 transitions, 4581 flow, removed 293 selfloop flow, removed 9 redundant places. [2024-01-27 15:47:45,533 INFO L231 Difference]: Finished difference. Result has 167 places, 316 transitions, 2967 flow [2024-01-27 15:47:45,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2967, PETRI_PLACES=167, PETRI_TRANSITIONS=316} [2024-01-27 15:47:45,534 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 134 predicate places. [2024-01-27 15:47:45,534 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 316 transitions, 2967 flow [2024-01-27 15:47:45,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.615384615384615) internal successors, (112), 13 states have internal predecessors, (112), 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 15:47:45,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:45,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:45,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:45,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:47:45,735 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:45,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:45,735 INFO L85 PathProgramCache]: Analyzing trace with hash -842569860, now seen corresponding path program 9 times [2024-01-27 15:47:45,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:45,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240159015] [2024-01-27 15:47:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:45,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240159015] [2024-01-27 15:47:45,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240159015] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553260206] [2024-01-27 15:47:45,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:47:45,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:45,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:45,829 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:45,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:47:45,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:47:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:45,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:47:45,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:46,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:46,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553260206] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:46,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:46,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 15:47:46,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613401200] [2024-01-27 15:47:46,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:46,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:47:46,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:46,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:47:46,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:47:46,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:47:46,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 316 transitions, 2967 flow. Second operand has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:46,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:46,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:47:46,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:47,779 INFO L124 PetriNetUnfolderBase]: 5876/8722 cut-off events. [2024-01-27 15:47:47,779 INFO L125 PetriNetUnfolderBase]: For 123551/123551 co-relation queries the response was YES. [2024-01-27 15:47:47,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55724 conditions, 8722 events. 5876/8722 cut-off events. For 123551/123551 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 46688 event pairs, 1074 based on Foata normal form. 22/8744 useless extension candidates. Maximal degree in co-relation 54842. Up to 2697 conditions per place. [2024-01-27 15:47:47,854 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 745 selfloop transitions, 213 changer transitions 0/959 dead transitions. [2024-01-27 15:47:47,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 959 transitions, 11276 flow [2024-01-27 15:47:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:47:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:47:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 410 transitions. [2024-01-27 15:47:47,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47235023041474655 [2024-01-27 15:47:47,857 INFO L175 Difference]: Start difference. First operand has 167 places, 316 transitions, 2967 flow. Second operand 28 states and 410 transitions. [2024-01-27 15:47:47,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 959 transitions, 11276 flow [2024-01-27 15:47:48,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 959 transitions, 11245 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-01-27 15:47:48,248 INFO L231 Difference]: Finished difference. Result has 198 places, 473 transitions, 5088 flow [2024-01-27 15:47:48,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5088, PETRI_PLACES=198, PETRI_TRANSITIONS=473} [2024-01-27 15:47:48,249 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 165 predicate places. [2024-01-27 15:47:48,249 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 473 transitions, 5088 flow [2024-01-27 15:47:48,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.25) internal successors, (125), 20 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:48,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:48,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:48,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-27 15:47:48,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:47:48,457 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:48,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:48,457 INFO L85 PathProgramCache]: Analyzing trace with hash -296948222, now seen corresponding path program 10 times [2024-01-27 15:47:48,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:48,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547402622] [2024-01-27 15:47:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:48,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:48,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:48,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547402622] [2024-01-27 15:47:48,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547402622] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:48,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811249682] [2024-01-27 15:47:48,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:47:48,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:48,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:48,574 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:48,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:47:48,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:47:48,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:48,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:47:48,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:48,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:48,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811249682] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:48,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:48,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:47:48,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432408002] [2024-01-27 15:47:48,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:48,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:47:48,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:47:48,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:47:48,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:47:48,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 473 transitions, 5088 flow. Second operand has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 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 15:47:48,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:48,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:47:48,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:50,493 INFO L124 PetriNetUnfolderBase]: 5963/8871 cut-off events. [2024-01-27 15:47:50,493 INFO L125 PetriNetUnfolderBase]: For 136355/136355 co-relation queries the response was YES. [2024-01-27 15:47:50,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59015 conditions, 8871 events. 5963/8871 cut-off events. For 136355/136355 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47903 event pairs, 1376 based on Foata normal form. 22/8893 useless extension candidates. Maximal degree in co-relation 58156. Up to 2753 conditions per place. [2024-01-27 15:47:50,573 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 398 selfloop transitions, 268 changer transitions 0/667 dead transitions. [2024-01-27 15:47:50,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 667 transitions, 8419 flow [2024-01-27 15:47:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:47:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:47:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 193 transitions. [2024-01-27 15:47:50,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447004608294931 [2024-01-27 15:47:50,574 INFO L175 Difference]: Start difference. First operand has 198 places, 473 transitions, 5088 flow. Second operand 14 states and 193 transitions. [2024-01-27 15:47:50,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 667 transitions, 8419 flow [2024-01-27 15:47:51,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 667 transitions, 8091 flow, removed 147 selfloop flow, removed 6 redundant places. [2024-01-27 15:47:51,295 INFO L231 Difference]: Finished difference. Result has 208 places, 498 transitions, 5891 flow [2024-01-27 15:47:51,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4794, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5891, PETRI_PLACES=208, PETRI_TRANSITIONS=498} [2024-01-27 15:47:51,296 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 175 predicate places. [2024-01-27 15:47:51,296 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 498 transitions, 5891 flow [2024-01-27 15:47:51,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 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 15:47:51,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:51,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:51,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:51,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:47:51,510 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:51,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1796388774, now seen corresponding path program 11 times [2024-01-27 15:47:51,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:51,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326559279] [2024-01-27 15:47:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:51,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:51,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326559279] [2024-01-27 15:47:51,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326559279] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:51,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515644790] [2024-01-27 15:47:51,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:47:51,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:51,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:51,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:47:51,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:47:51,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:51,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:47:51,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:51,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:51,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515644790] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:51,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:51,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2024-01-27 15:47:51,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096834170] [2024-01-27 15:47:51,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:51,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:47:51,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:51,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:47:51,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:47:51,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:47:51,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 498 transitions, 5891 flow. Second operand has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:51,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:51,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:47:51,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:54,633 INFO L124 PetriNetUnfolderBase]: 6129/9154 cut-off events. [2024-01-27 15:47:54,634 INFO L125 PetriNetUnfolderBase]: For 134131/134131 co-relation queries the response was YES. [2024-01-27 15:47:54,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61067 conditions, 9154 events. 6129/9154 cut-off events. For 134131/134131 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 50229 event pairs, 679 based on Foata normal form. 22/9176 useless extension candidates. Maximal degree in co-relation 60224. Up to 2859 conditions per place. [2024-01-27 15:47:54,703 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 377 selfloop transitions, 614 changer transitions 0/992 dead transitions. [2024-01-27 15:47:54,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 992 transitions, 13154 flow [2024-01-27 15:47:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-27 15:47:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-27 15:47:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 560 transitions. [2024-01-27 15:47:54,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-01-27 15:47:54,705 INFO L175 Difference]: Start difference. First operand has 208 places, 498 transitions, 5891 flow. Second operand 49 states and 560 transitions. [2024-01-27 15:47:54,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 992 transitions, 13154 flow [2024-01-27 15:47:55,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 992 transitions, 12979 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-01-27 15:47:55,141 INFO L231 Difference]: Finished difference. Result has 263 places, 725 transitions, 10463 flow [2024-01-27 15:47:55,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5760, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=10463, PETRI_PLACES=263, PETRI_TRANSITIONS=725} [2024-01-27 15:47:55,142 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 230 predicate places. [2024-01-27 15:47:55,142 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 725 transitions, 10463 flow [2024-01-27 15:47:55,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:47:55,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:55,142 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:55,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:47:55,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:47:55,343 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:55,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1099657894, now seen corresponding path program 12 times [2024-01-27 15:47:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:55,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619814987] [2024-01-27 15:47:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:55,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:55,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:55,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619814987] [2024-01-27 15:47:55,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619814987] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:55,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574464142] [2024-01-27 15:47:55,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:47:55,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:55,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:55,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:55,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:47:55,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:47:55,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:55,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:47:55,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:55,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:55,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574464142] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:55,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:55,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-27 15:47:55,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033573097] [2024-01-27 15:47:55,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:55,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:47:55,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:55,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:47:55,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:47:55,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:47:55,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 725 transitions, 10463 flow. Second operand has 21 states, 21 states have (on average 6.190476190476191) internal successors, (130), 21 states have internal predecessors, (130), 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 15:47:55,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:55,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:47:55,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:58,118 INFO L124 PetriNetUnfolderBase]: 7828/11686 cut-off events. [2024-01-27 15:47:58,118 INFO L125 PetriNetUnfolderBase]: For 217858/217858 co-relation queries the response was YES. [2024-01-27 15:47:58,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87334 conditions, 11686 events. 7828/11686 cut-off events. For 217858/217858 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 67455 event pairs, 1749 based on Foata normal form. 20/11706 useless extension candidates. Maximal degree in co-relation 86243. Up to 3982 conditions per place. [2024-01-27 15:47:58,232 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 630 selfloop transitions, 414 changer transitions 0/1045 dead transitions. [2024-01-27 15:47:58,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1045 transitions, 16197 flow [2024-01-27 15:47:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:47:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:47:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 200 transitions. [2024-01-27 15:47:58,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608294930875576 [2024-01-27 15:47:58,234 INFO L175 Difference]: Start difference. First operand has 263 places, 725 transitions, 10463 flow. Second operand 14 states and 200 transitions. [2024-01-27 15:47:58,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1045 transitions, 16197 flow [2024-01-27 15:47:59,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1045 transitions, 15131 flow, removed 210 selfloop flow, removed 12 redundant places. [2024-01-27 15:47:59,501 INFO L231 Difference]: Finished difference. Result has 264 places, 822 transitions, 12273 flow [2024-01-27 15:47:59,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=9431, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12273, PETRI_PLACES=264, PETRI_TRANSITIONS=822} [2024-01-27 15:47:59,502 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 231 predicate places. [2024-01-27 15:47:59,502 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 822 transitions, 12273 flow [2024-01-27 15:47:59,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.190476190476191) internal successors, (130), 21 states have internal predecessors, (130), 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 15:47:59,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:59,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:59,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-01-27 15:47:59,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:59,716 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:59,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 720624854, now seen corresponding path program 13 times [2024-01-27 15:47:59,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:59,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891699263] [2024-01-27 15:47:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:59,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:59,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:59,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891699263] [2024-01-27 15:47:59,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891699263] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:59,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599066867] [2024-01-27 15:47:59,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:47:59,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:59,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:59,838 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:59,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:47:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:59,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:47:59,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:00,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:00,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599066867] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:00,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:00,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:48:00,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705209848] [2024-01-27 15:48:00,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:00,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:48:00,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:00,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:48:00,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:48:00,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:48:00,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 822 transitions, 12273 flow. Second operand has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:00,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:00,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:48:00,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:02,736 INFO L124 PetriNetUnfolderBase]: 7797/11630 cut-off events. [2024-01-27 15:48:02,736 INFO L125 PetriNetUnfolderBase]: For 217163/217163 co-relation queries the response was YES. [2024-01-27 15:48:02,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88902 conditions, 11630 events. 7797/11630 cut-off events. For 217163/217163 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 66199 event pairs, 1619 based on Foata normal form. 22/11652 useless extension candidates. Maximal degree in co-relation 87769. Up to 3843 conditions per place. [2024-01-27 15:48:02,860 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 665 selfloop transitions, 319 changer transitions 0/985 dead transitions. [2024-01-27 15:48:02,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 985 transitions, 16099 flow [2024-01-27 15:48:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:48:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:48:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 195 transitions. [2024-01-27 15:48:02,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44930875576036866 [2024-01-27 15:48:02,861 INFO L175 Difference]: Start difference. First operand has 264 places, 822 transitions, 12273 flow. Second operand 14 states and 195 transitions. [2024-01-27 15:48:02,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 985 transitions, 16099 flow [2024-01-27 15:48:03,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 985 transitions, 15678 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-01-27 15:48:03,817 INFO L231 Difference]: Finished difference. Result has 269 places, 822 transitions, 12507 flow [2024-01-27 15:48:03,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=11855, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12507, PETRI_PLACES=269, PETRI_TRANSITIONS=822} [2024-01-27 15:48:03,818 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 236 predicate places. [2024-01-27 15:48:03,819 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 822 transitions, 12507 flow [2024-01-27 15:48:03,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:03,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:03,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:03,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:04,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:48:04,031 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:48:04,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:04,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1958285428, now seen corresponding path program 14 times [2024-01-27 15:48:04,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:04,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459371302] [2024-01-27 15:48:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:04,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:04,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:04,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459371302] [2024-01-27 15:48:04,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459371302] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:04,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672509038] [2024-01-27 15:48:04,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:48:04,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:04,124 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:04,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:48:04,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:48:04,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:04,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:48:04,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:04,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:04,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672509038] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:04,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:04,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-27 15:48:04,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229417248] [2024-01-27 15:48:04,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:04,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:48:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:48:04,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:48:04,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:48:04,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 822 transitions, 12507 flow. Second operand has 21 states, 21 states have (on average 6.380952380952381) internal successors, (134), 21 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:04,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:04,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:48:04,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:07,571 INFO L124 PetriNetUnfolderBase]: 8880/13162 cut-off events. [2024-01-27 15:48:07,571 INFO L125 PetriNetUnfolderBase]: For 268319/268319 co-relation queries the response was YES. [2024-01-27 15:48:07,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104271 conditions, 13162 events. 8880/13162 cut-off events. For 268319/268319 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 76099 event pairs, 1719 based on Foata normal form. 20/13182 useless extension candidates. Maximal degree in co-relation 103129. Up to 4573 conditions per place. [2024-01-27 15:48:07,706 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 839 selfloop transitions, 385 changer transitions 0/1225 dead transitions. [2024-01-27 15:48:07,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1225 transitions, 19937 flow [2024-01-27 15:48:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:48:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:48:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 239 transitions. [2024-01-27 15:48:07,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48185483870967744 [2024-01-27 15:48:07,707 INFO L175 Difference]: Start difference. First operand has 269 places, 822 transitions, 12507 flow. Second operand 16 states and 239 transitions. [2024-01-27 15:48:07,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1225 transitions, 19937 flow [2024-01-27 15:48:08,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 1225 transitions, 19731 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-27 15:48:08,810 INFO L231 Difference]: Finished difference. Result has 281 places, 908 transitions, 15201 flow [2024-01-27 15:48:08,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=12301, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=15201, PETRI_PLACES=281, PETRI_TRANSITIONS=908} [2024-01-27 15:48:08,811 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 248 predicate places. [2024-01-27 15:48:08,811 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 908 transitions, 15201 flow [2024-01-27 15:48:08,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.380952380952381) internal successors, (134), 21 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:08,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:08,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:08,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:09,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:09,012 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:48:09,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:09,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1761529566, now seen corresponding path program 15 times [2024-01-27 15:48:09,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:09,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248465225] [2024-01-27 15:48:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:09,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:09,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248465225] [2024-01-27 15:48:09,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248465225] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:09,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173365787] [2024-01-27 15:48:09,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:48:09,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:09,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:09,103 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:09,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:48:09,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:48:09,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:09,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:48:09,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:09,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:09,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173365787] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:09,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:09,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:48:09,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847801861] [2024-01-27 15:48:09,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:09,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:48:09,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:48:09,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:48:09,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:48:09,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 908 transitions, 15201 flow. Second operand has 19 states, 19 states have (on average 6.526315789473684) internal successors, (124), 19 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:09,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:09,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:48:09,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:12,720 INFO L124 PetriNetUnfolderBase]: 8943/13274 cut-off events. [2024-01-27 15:48:12,720 INFO L125 PetriNetUnfolderBase]: For 290420/290420 co-relation queries the response was YES. [2024-01-27 15:48:12,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108529 conditions, 13274 events. 8943/13274 cut-off events. For 290420/290420 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 76649 event pairs, 1618 based on Foata normal form. 20/13294 useless extension candidates. Maximal degree in co-relation 107396. Up to 4633 conditions per place. [2024-01-27 15:48:12,839 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 835 selfloop transitions, 247 changer transitions 0/1083 dead transitions. [2024-01-27 15:48:12,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1083 transitions, 19500 flow [2024-01-27 15:48:12,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:48:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:48:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 170 transitions. [2024-01-27 15:48:12,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45698924731182794 [2024-01-27 15:48:12,841 INFO L175 Difference]: Start difference. First operand has 281 places, 908 transitions, 15201 flow. Second operand 12 states and 170 transitions. [2024-01-27 15:48:12,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1083 transitions, 19500 flow [2024-01-27 15:48:13,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1083 transitions, 19359 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-01-27 15:48:13,984 INFO L231 Difference]: Finished difference. Result has 286 places, 917 transitions, 15778 flow [2024-01-27 15:48:13,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=15060, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15778, PETRI_PLACES=286, PETRI_TRANSITIONS=917} [2024-01-27 15:48:13,985 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 253 predicate places. [2024-01-27 15:48:13,986 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 917 transitions, 15778 flow [2024-01-27 15:48:13,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.526315789473684) internal successors, (124), 19 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:13,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:13,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:13,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-01-27 15:48:14,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:14,197 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:48:14,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1568476656, now seen corresponding path program 16 times [2024-01-27 15:48:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908813962] [2024-01-27 15:48:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:14,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:14,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908813962] [2024-01-27 15:48:14,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908813962] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:14,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625448175] [2024-01-27 15:48:14,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:48:14,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:14,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:14,288 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:14,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:48:14,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:48:14,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:14,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:48:14,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:14,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:48:14,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625448175] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:14,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:14,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-27 15:48:14,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741724172] [2024-01-27 15:48:14,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:14,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:48:14,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:14,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:48:14,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:48:14,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:48:14,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 917 transitions, 15778 flow. Second operand has 21 states, 21 states have (on average 6.190476190476191) internal successors, (130), 21 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:14,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:14,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:48:14,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:17,967 INFO L124 PetriNetUnfolderBase]: 8914/13220 cut-off events. [2024-01-27 15:48:17,968 INFO L125 PetriNetUnfolderBase]: For 303048/303048 co-relation queries the response was YES. [2024-01-27 15:48:18,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109307 conditions, 13220 events. 8914/13220 cut-off events. For 303048/303048 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 76180 event pairs, 1274 based on Foata normal form. 20/13240 useless extension candidates. Maximal degree in co-relation 108325. Up to 4621 conditions per place. [2024-01-27 15:48:18,232 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 712 selfloop transitions, 506 changer transitions 0/1219 dead transitions. [2024-01-27 15:48:18,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1219 transitions, 21838 flow [2024-01-27 15:48:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:48:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:48:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 300 transitions. [2024-01-27 15:48:18,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-01-27 15:48:18,234 INFO L175 Difference]: Start difference. First operand has 286 places, 917 transitions, 15778 flow. Second operand 20 states and 300 transitions. [2024-01-27 15:48:18,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1219 transitions, 21838 flow [2024-01-27 15:48:19,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1219 transitions, 21359 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-01-27 15:48:19,311 INFO L231 Difference]: Finished difference. Result has 295 places, 917 transitions, 16352 flow [2024-01-27 15:48:19,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=15220, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=16352, PETRI_PLACES=295, PETRI_TRANSITIONS=917} [2024-01-27 15:48:19,312 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 262 predicate places. [2024-01-27 15:48:19,312 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 917 transitions, 16352 flow [2024-01-27 15:48:19,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.190476190476191) internal successors, (130), 21 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:19,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:19,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:48:19,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:19,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:19,512 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:48:19,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash -606587546, now seen corresponding path program 2 times [2024-01-27 15:48:19,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:19,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792935398] [2024-01-27 15:48:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:19,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:20,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:20,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792935398] [2024-01-27 15:48:20,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792935398] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:20,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547025850] [2024-01-27 15:48:20,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:48:20,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:20,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:20,854 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:20,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:48:20,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:48:20,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:20,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2024-01-27 15:48:20,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:21,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:48:22,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:48:22,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 104 [2024-01-27 15:48:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:22,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:33,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 943 treesize of output 843 [2024-01-27 15:48:33,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:48:33,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2130 treesize of output 1642 [2024-01-27 15:48:50,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 823 treesize of output 739 [2024-01-27 15:48:51,008 INFO L349 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2024-01-27 15:48:51,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1547 treesize of output 1188 [2024-01-27 15:48:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:53,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547025850] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:53,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:53,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2024-01-27 15:48:53,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595366251] [2024-01-27 15:48:53,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:53,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-01-27 15:48:53,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:53,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-01-27 15:48:53,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2024-01-27 15:48:53,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:48:53,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 917 transitions, 16352 flow. Second operand has 39 states, 39 states have (on average 6.128205128205129) internal successors, (239), 39 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:53,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:53,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:48:53,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:23,142 INFO L124 PetriNetUnfolderBase]: 12267/18284 cut-off events. [2024-01-27 15:49:23,142 INFO L125 PetriNetUnfolderBase]: For 447040/447040 co-relation queries the response was YES. [2024-01-27 15:49:23,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157573 conditions, 18284 events. 12267/18284 cut-off events. For 447040/447040 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 112256 event pairs, 994 based on Foata normal form. 1/18285 useless extension candidates. Maximal degree in co-relation 156551. Up to 13175 conditions per place. [2024-01-27 15:49:23,350 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 1106 selfloop transitions, 653 changer transitions 3/1763 dead transitions. [2024-01-27 15:49:23,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1763 transitions, 34139 flow [2024-01-27 15:49:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-27 15:49:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-27 15:49:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 532 transitions. [2024-01-27 15:49:23,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-01-27 15:49:23,352 INFO L175 Difference]: Start difference. First operand has 295 places, 917 transitions, 16352 flow. Second operand 40 states and 532 transitions. [2024-01-27 15:49:23,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1763 transitions, 34139 flow [2024-01-27 15:49:25,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1763 transitions, 33005 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-01-27 15:49:25,665 INFO L231 Difference]: Finished difference. Result has 344 places, 1377 transitions, 28292 flow [2024-01-27 15:49:25,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=15708, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=917, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=28292, PETRI_PLACES=344, PETRI_TRANSITIONS=1377} [2024-01-27 15:49:25,666 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 311 predicate places. [2024-01-27 15:49:25,666 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1377 transitions, 28292 flow [2024-01-27 15:49:25,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.128205128205129) internal successors, (239), 39 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:25,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:25,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:25,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:25,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:25,867 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:25,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash 458666122, now seen corresponding path program 17 times [2024-01-27 15:49:25,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:25,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631419788] [2024-01-27 15:49:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:25,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:25,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:25,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631419788] [2024-01-27 15:49:25,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631419788] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:25,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509458741] [2024-01-27 15:49:25,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:49:25,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:25,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:25,947 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:25,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:49:26,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:49:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:26,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:49:26,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:26,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:26,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509458741] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:26,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:26,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:49:26,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21164910] [2024-01-27 15:49:26,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:26,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:49:26,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:49:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:49:26,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2024-01-27 15:49:26,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1377 transitions, 28292 flow. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:26,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:26,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2024-01-27 15:49:26,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:31,262 INFO L124 PetriNetUnfolderBase]: 10628/15777 cut-off events. [2024-01-27 15:49:31,263 INFO L125 PetriNetUnfolderBase]: For 511824/511824 co-relation queries the response was YES. [2024-01-27 15:49:31,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156214 conditions, 15777 events. 10628/15777 cut-off events. For 511824/511824 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 93567 event pairs, 3298 based on Foata normal form. 150/15927 useless extension candidates. Maximal degree in co-relation 156105. Up to 13637 conditions per place. [2024-01-27 15:49:31,714 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 1240 selfloop transitions, 3 changer transitions 97/1341 dead transitions. [2024-01-27 15:49:31,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1341 transitions, 30339 flow [2024-01-27 15:49:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:49:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:49:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-01-27 15:49:31,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45622119815668205 [2024-01-27 15:49:31,715 INFO L175 Difference]: Start difference. First operand has 344 places, 1377 transitions, 28292 flow. Second operand 7 states and 99 transitions. [2024-01-27 15:49:31,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1341 transitions, 30339 flow [2024-01-27 15:49:36,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1341 transitions, 27360 flow, removed 1084 selfloop flow, removed 12 redundant places. [2024-01-27 15:49:36,436 INFO L231 Difference]: Finished difference. Result has 329 places, 1244 transitions, 23783 flow [2024-01-27 15:49:36,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=24557, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=23783, PETRI_PLACES=329, PETRI_TRANSITIONS=1244} [2024-01-27 15:49:36,437 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 296 predicate places. [2024-01-27 15:49:36,437 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1244 transitions, 23783 flow [2024-01-27 15:49:36,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:36,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:36,438 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:36,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-01-27 15:49:36,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-27 15:49:36,638 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:49:36,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:36,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1677967918, now seen corresponding path program 3 times [2024-01-27 15:49:36,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:36,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403112054] [2024-01-27 15:49:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:36,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:38,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:38,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403112054] [2024-01-27 15:49:38,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403112054] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:38,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093546152] [2024-01-27 15:49:38,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:49:38,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:38,107 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:49:38,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:49:38,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:49:38,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:38,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-27 15:49:38,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:38,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:49:39,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:39,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 88 [2024-01-27 15:49:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:39,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:43,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1122 treesize of output 1008 [2024-01-27 15:49:45,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:45,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 2106 treesize of output 2440