./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i --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/pthread-C-DAC/pthread-demo-datarace-1.i -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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:11:39,830 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:11:39,868 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:11:39,878 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:11:39,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:11:39,998 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:11:39,998 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:11:39,999 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:11:39,999 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:11:39,999 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:11:40,000 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:11:40,000 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:11:40,000 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:11:40,001 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:11:40,001 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:11:40,001 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:11:40,002 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:11:40,002 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:11:40,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:11:40,002 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:11:40,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:11:40,003 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:11:40,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:11:40,004 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:11:40,004 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:11:40,004 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:11:40,004 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:11:40,005 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:11:40,005 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:11:40,005 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:11:40,005 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:11:40,006 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:11:40,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:11:40,006 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:11:40,006 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:11:40,007 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:11:40,007 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:11:40,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:11:40,013 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:11:40,014 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:11:40,014 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:11:40,014 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:11:40,014 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:11:40,014 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2024-01-27 15:11:40,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:11:40,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:11:40,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:11:40,238 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:11:40,238 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:11:40,239 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2024-01-27 15:11:41,423 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:11:41,631 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:11:41,631 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2024-01-27 15:11:41,647 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d7161aa1/a34c38b47dba463ea52601b7e9801a94/FLAG327d76c47 [2024-01-27 15:11:41,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d7161aa1/a34c38b47dba463ea52601b7e9801a94 [2024-01-27 15:11:41,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:11:41,675 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:11:41,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:11:41,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:11:41,679 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:11:41,680 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:11:41" (1/1) ... [2024-01-27 15:11:41,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b7f8ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:41, skipping insertion in model container [2024-01-27 15:11:41,680 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:11:41" (1/1) ... [2024-01-27 15:11:41,798 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:11:41,927 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2024-01-27 15:11:42,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:11:42,203 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:11:42,213 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2024-01-27 15:11:42,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:11:42,313 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:11:42,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42 WrapperNode [2024-01-27 15:11:42,313 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:11:42,316 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:11:42,316 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:11:42,316 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:11:42,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,339 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,363 INFO L138 Inliner]: procedures = 365, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2024-01-27 15:11:42,363 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:11:42,364 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:11:42,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:11:42,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:11:42,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,381 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,394 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-01-27 15:11:42,394 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,401 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,409 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,410 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,418 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,420 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:11:42,421 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:11:42,421 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:11:42,421 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:11:42,422 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (1/1) ... [2024-01-27 15:11:42,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:11:42,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:11:42,502 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 15:11:42,508 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 15:11:42,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:11:42,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:11:42,552 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 15:11:42,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:11:42,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:11:42,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:11:42,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:11:42,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:11:42,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:11:42,553 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 15:11:42,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:11:42,553 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2024-01-27 15:11:42,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2024-01-27 15:11:42,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:11:42,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:11:42,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:11:42,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:11:42,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:11:42,561 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 15:11:42,685 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:11:42,687 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:11:42,794 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:11:42,794 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:11:42,877 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:11:42,877 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:11:42,877 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:11:42 BoogieIcfgContainer [2024-01-27 15:11:42,877 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:11:42,879 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:11:42,879 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:11:42,881 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:11:42,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:11:41" (1/3) ... [2024-01-27 15:11:42,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b200dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:11:42, skipping insertion in model container [2024-01-27 15:11:42,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:11:42" (2/3) ... [2024-01-27 15:11:42,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b200dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:11:42, skipping insertion in model container [2024-01-27 15:11:42,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:11:42" (3/3) ... [2024-01-27 15:11:42,883 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2024-01-27 15:11:42,889 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:11:42,896 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:11:42,897 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:11:42,897 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:11:42,922 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-01-27 15:11:42,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 55 flow [2024-01-27 15:11:42,971 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2024-01-27 15:11:42,971 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:11:42,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 23 events. 3/23 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-01-27 15:11:42,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 24 transitions, 55 flow [2024-01-27 15:11:42,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 46 flow [2024-01-27 15:11:42,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:11:42,987 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;@5e498e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:11:42,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 15:11:43,000 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:11:43,000 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-27 15:11:43,000 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:11:43,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:11:43,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:11:43,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:11:43,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:11:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1428559675, now seen corresponding path program 1 times [2024-01-27 15:11:43,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:11:43,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077104757] [2024-01-27 15:11:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:11:43,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:11:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:11:43,255 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 15:11:43,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:11:43,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077104757] [2024-01-27 15:11:43,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077104757] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:11:43,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:11:43,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:11:43,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697293141] [2024-01-27 15:11:43,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:11:43,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:11:43,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:11:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:11:43,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:11:43,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-01-27 15:11:43,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 15:11:43,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:11:43,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-01-27 15:11:43,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:11:43,422 INFO L124 PetriNetUnfolderBase]: 61/133 cut-off events. [2024-01-27 15:11:43,422 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:11:43,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 133 events. 61/133 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 398 event pairs, 27 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 247. Up to 77 conditions per place. [2024-01-27 15:11:43,426 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-01-27 15:11:43,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 118 flow [2024-01-27 15:11:43,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:11:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:11:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-01-27 15:11:43,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-01-27 15:11:43,439 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 46 flow. Second operand 3 states and 45 transitions. [2024-01-27 15:11:43,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 118 flow [2024-01-27 15:11:43,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:11:43,445 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 54 flow [2024-01-27 15:11:43,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2024-01-27 15:11:43,450 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2024-01-27 15:11:43,451 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 54 flow [2024-01-27 15:11:43,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 15:11:43,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:11:43,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:11:43,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:11:43,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:11:43,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:11:43,454 INFO L85 PathProgramCache]: Analyzing trace with hash 186676813, now seen corresponding path program 1 times [2024-01-27 15:11:43,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:11:43,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752003515] [2024-01-27 15:11:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:11:43,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:11:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:11:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:11:43,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:11:43,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752003515] [2024-01-27 15:11:43,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752003515] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:11:43,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:11:43,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:11:43,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910960455] [2024-01-27 15:11:43,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:11:43,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:11:43,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:11:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:11:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:11:43,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-01-27 15:11:43,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 15:11:43,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:11:43,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-01-27 15:11:43,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:11:43,676 INFO L124 PetriNetUnfolderBase]: 101/220 cut-off events. [2024-01-27 15:11:43,676 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-01-27 15:11:43,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 220 events. 101/220 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 763 event pairs, 53 based on Foata normal form. 10/230 useless extension candidates. Maximal degree in co-relation 144. Up to 125 conditions per place. [2024-01-27 15:11:43,678 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-01-27 15:11:43,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 32 transitions, 142 flow [2024-01-27 15:11:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:11:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:11:43,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-01-27 15:11:43,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-01-27 15:11:43,680 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2024-01-27 15:11:43,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 32 transitions, 142 flow [2024-01-27 15:11:43,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:11:43,682 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 64 flow [2024-01-27 15:11:43,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-01-27 15:11:43,685 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2024-01-27 15:11:43,685 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 64 flow [2024-01-27 15:11:43,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 15:11:43,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:11:43,685 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] [2024-01-27 15:11:43,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:11:43,686 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:11:43,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:11:43,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1333408012, now seen corresponding path program 1 times [2024-01-27 15:11:43,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:11:43,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941610124] [2024-01-27 15:11:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:11:43,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:11:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:11:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:11:43,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:11:43,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941610124] [2024-01-27 15:11:43,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941610124] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:11:43,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:11:43,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:11:43,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009254518] [2024-01-27 15:11:43,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:11:43,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:11:43,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:11:43,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:11:43,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:11:43,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2024-01-27 15:11:43,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:11:43,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:11:43,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2024-01-27 15:11:43,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:11:43,892 INFO L124 PetriNetUnfolderBase]: 69/170 cut-off events. [2024-01-27 15:11:43,892 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-01-27 15:11:43,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 170 events. 69/170 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 524 event pairs, 25 based on Foata normal form. 16/185 useless extension candidates. Maximal degree in co-relation 117. Up to 80 conditions per place. [2024-01-27 15:11:43,895 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 22 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2024-01-27 15:11:43,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 150 flow [2024-01-27 15:11:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:11:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:11:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-01-27 15:11:43,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-01-27 15:11:43,897 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 64 flow. Second operand 3 states and 42 transitions. [2024-01-27 15:11:43,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 150 flow [2024-01-27 15:11:43,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:11:43,899 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 70 flow [2024-01-27 15:11:43,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-01-27 15:11:43,900 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 4 predicate places. [2024-01-27 15:11:43,900 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 70 flow [2024-01-27 15:11:43,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:11:43,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:11:43,901 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] [2024-01-27 15:11:43,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:11:43,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:11:43,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:11:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1673449266, now seen corresponding path program 2 times [2024-01-27 15:11:43,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:11:43,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143880253] [2024-01-27 15:11:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:11:43,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:11:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:11:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:11:43,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:11:43,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143880253] [2024-01-27 15:11:43,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143880253] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:11:43,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654815923] [2024-01-27 15:11:43,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:11:43,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:11:43,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:11:43,981 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 15:11:44,012 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 15:11:44,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:11:44,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:11:44,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:11:44,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:11:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:11:44,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:11:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:11:44,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654815923] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:11:44,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:11:44,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-27 15:11:44,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706825914] [2024-01-27 15:11:44,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:11:44,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:11:44,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:11:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:11:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:11:44,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:11:44,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:11:44,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:11:44,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:11:44,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:11:44,286 INFO L124 PetriNetUnfolderBase]: 167/374 cut-off events. [2024-01-27 15:11:44,286 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-01-27 15:11:44,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 374 events. 167/374 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1295 event pairs, 14 based on Foata normal form. 30/404 useless extension candidates. Maximal degree in co-relation 261. Up to 86 conditions per place. [2024-01-27 15:11:44,288 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2024-01-27 15:11:44,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 65 transitions, 344 flow [2024-01-27 15:11:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:11:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:11:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-01-27 15:11:44,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-01-27 15:11:44,289 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 70 flow. Second operand 6 states and 90 transitions. [2024-01-27 15:11:44,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 65 transitions, 344 flow [2024-01-27 15:11:44,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:11:44,291 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 106 flow [2024-01-27 15:11:44,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=106, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2024-01-27 15:11:44,292 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2024-01-27 15:11:44,292 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 106 flow [2024-01-27 15:11:44,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:11:44,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:11:44,292 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:11:44,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:11:44,503 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 15:11:44,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:11:44,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:11:44,504 INFO L85 PathProgramCache]: Analyzing trace with hash 486967852, now seen corresponding path program 3 times [2024-01-27 15:11:44,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:11:44,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558373976] [2024-01-27 15:11:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:11:44,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:11:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:11:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:11:44,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:11:44,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558373976] [2024-01-27 15:11:44,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558373976] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:11:44,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10002213] [2024-01-27 15:11:44,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:11:44,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:11:44,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:11:44,570 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 15:11:44,571 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 15:11:44,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:11:44,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:11:44,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:11:44,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:11:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:11:44,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:11:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:11:44,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10002213] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:11:44,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:11:44,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-27 15:11:44,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920925132] [2024-01-27 15:11:44,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:11:44,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:11:44,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:11:44,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:11:44,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:11:44,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:11:44,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:11:44,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:11:44,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:11:44,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:11:44,803 INFO L124 PetriNetUnfolderBase]: 289/675 cut-off events. [2024-01-27 15:11:44,803 INFO L125 PetriNetUnfolderBase]: For 919/919 co-relation queries the response was YES. [2024-01-27 15:11:44,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1992 conditions, 675 events. 289/675 cut-off events. For 919/919 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2913 event pairs, 28 based on Foata normal form. 57/732 useless extension candidates. Maximal degree in co-relation 1214. Up to 156 conditions per place. [2024-01-27 15:11:44,830 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2024-01-27 15:11:44,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 514 flow [2024-01-27 15:11:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:11:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:11:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-01-27 15:11:44,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-01-27 15:11:44,832 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 106 flow. Second operand 6 states and 90 transitions. [2024-01-27 15:11:44,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 514 flow [2024-01-27 15:11:44,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 76 transitions, 474 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-01-27 15:11:44,835 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 138 flow [2024-01-27 15:11:44,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2024-01-27 15:11:44,835 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-01-27 15:11:44,835 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 138 flow [2024-01-27 15:11:44,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:11:44,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:11:44,836 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:11:44,847 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 15:11:45,036 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 15:11:45,037 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:11:45,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:11:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash 374699711, now seen corresponding path program 4 times [2024-01-27 15:11:45,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:11:45,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131291834] [2024-01-27 15:11:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:11:45,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:11:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:11:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:11:45,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:11:45,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131291834] [2024-01-27 15:11:45,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131291834] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:11:45,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827971692] [2024-01-27 15:11:45,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:11:45,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:11:45,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:11:45,162 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 15:11:45,183 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 15:11:45,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:11:45,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:11:45,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:11:45,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:11:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:11:45,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:11:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:11:45,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827971692] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:11:45,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:11:45,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 15:11:45,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783018342] [2024-01-27 15:11:45,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:11:45,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:11:45,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:11:45,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:11:45,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:11:45,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:11:45,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 138 flow. Second operand has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 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 15:11:45,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:11:45,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:11:45,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:11:45,693 INFO L124 PetriNetUnfolderBase]: 642/1516 cut-off events. [2024-01-27 15:11:45,693 INFO L125 PetriNetUnfolderBase]: For 2539/2539 co-relation queries the response was YES. [2024-01-27 15:11:45,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 1516 events. 642/1516 cut-off events. For 2539/2539 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 6870 event pairs, 51 based on Foata normal form. 114/1630 useless extension candidates. Maximal degree in co-relation 3154. Up to 265 conditions per place. [2024-01-27 15:11:45,702 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 144 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2024-01-27 15:11:45,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 160 transitions, 1098 flow [2024-01-27 15:11:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:11:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:11:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-01-27 15:11:45,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-01-27 15:11:45,704 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 138 flow. Second operand 12 states and 189 transitions. [2024-01-27 15:11:45,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 160 transitions, 1098 flow [2024-01-27 15:11:45,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 160 transitions, 1078 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-01-27 15:11:45,709 INFO L231 Difference]: Finished difference. Result has 59 places, 35 transitions, 226 flow [2024-01-27 15:11:45,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=226, PETRI_PLACES=59, PETRI_TRANSITIONS=35} [2024-01-27 15:11:45,710 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2024-01-27 15:11:45,710 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 35 transitions, 226 flow [2024-01-27 15:11:45,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 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 15:11:45,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:11:45,711 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:11:45,727 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 15:11:45,922 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 15:11:45,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:11:45,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:11:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash 69204173, now seen corresponding path program 5 times [2024-01-27 15:11:45,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:11:45,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077524131] [2024-01-27 15:11:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:11:45,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:11:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:11:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-01-27 15:11:46,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:11:46,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077524131] [2024-01-27 15:11:46,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077524131] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:11:46,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775079928] [2024-01-27 15:11:46,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:11:46,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:11:46,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:11:46,129 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 15:11:46,152 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 15:11:46,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-01-27 15:11:46,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:11:46,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:11:46,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:11:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-01-27 15:11:46,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:11:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-01-27 15:11:46,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775079928] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:11:46,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:11:46,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 15:11:46,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739809471] [2024-01-27 15:11:46,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:11:46,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:11:46,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:11:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:11:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:11:46,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:11:46,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 35 transitions, 226 flow. Second operand has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 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 15:11:46,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:11:46,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:11:46,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:11:46,910 INFO L124 PetriNetUnfolderBase]: 1434/3383 cut-off events. [2024-01-27 15:11:46,910 INFO L125 PetriNetUnfolderBase]: For 10070/10070 co-relation queries the response was YES. [2024-01-27 15:11:46,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11992 conditions, 3383 events. 1434/3383 cut-off events. For 10070/10070 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18832 event pairs, 117 based on Foata normal form. 258/3641 useless extension candidates. Maximal degree in co-relation 9580. Up to 583 conditions per place. [2024-01-27 15:11:46,931 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 210 selfloop transitions, 12 changer transitions 0/227 dead transitions. [2024-01-27 15:11:46,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 227 transitions, 2146 flow [2024-01-27 15:11:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:11:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:11:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-01-27 15:11:46,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-01-27 15:11:46,933 INFO L175 Difference]: Start difference. First operand has 59 places, 35 transitions, 226 flow. Second operand 12 states and 189 transitions. [2024-01-27 15:11:46,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 227 transitions, 2146 flow [2024-01-27 15:11:46,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 227 transitions, 2080 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:11:46,942 INFO L231 Difference]: Finished difference. Result has 74 places, 42 transitions, 316 flow [2024-01-27 15:11:46,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=316, PETRI_PLACES=74, PETRI_TRANSITIONS=42} [2024-01-27 15:11:46,943 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 52 predicate places. [2024-01-27 15:11:46,943 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 42 transitions, 316 flow [2024-01-27 15:11:46,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 13 states have internal predecessors, (140), 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 15:11:46,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:11:46,944 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:11:46,966 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 15:11:47,156 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 15:11:47,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:11:47,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:11:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1521453609, now seen corresponding path program 6 times [2024-01-27 15:11:47,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:11:47,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85995306] [2024-01-27 15:11:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:11:47,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:11:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:11:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-01-27 15:11:47,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:11:47,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85995306] [2024-01-27 15:11:47,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85995306] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:11:47,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374417679] [2024-01-27 15:11:47,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:11:47,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:11:47,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:11:47,476 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 15:11:47,499 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 15:11:47,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-01-27 15:11:47,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:11:47,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:11:47,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:11:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 19 proven. 244 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-01-27 15:11:47,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:11:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 19 proven. 244 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-01-27 15:11:48,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374417679] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:11:48,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:11:48,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2024-01-27 15:11:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973787024] [2024-01-27 15:11:48,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:11:48,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:11:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:11:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:11:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=748, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:11:48,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:11:48,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 42 transitions, 316 flow. Second operand has 33 states, 33 states have (on average 10.090909090909092) internal successors, (333), 33 states have internal predecessors, (333), 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 15:11:48,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:11:48,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:11:48,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:11:57,481 INFO L124 PetriNetUnfolderBase]: 3231/7596 cut-off events. [2024-01-27 15:11:57,481 INFO L125 PetriNetUnfolderBase]: For 46895/46895 co-relation queries the response was YES. [2024-01-27 15:11:57,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30225 conditions, 7596 events. 3231/7596 cut-off events. For 46895/46895 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 45653 event pairs, 10 based on Foata normal form. 603/8199 useless extension candidates. Maximal degree in co-relation 21393. Up to 1339 conditions per place. [2024-01-27 15:11:57,569 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 1774 selfloop transitions, 516 changer transitions 0/2295 dead transitions. [2024-01-27 15:11:57,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 2295 transitions, 16226 flow [2024-01-27 15:11:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2024-01-27 15:11:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2024-01-27 15:11:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 3696 transitions. [2024-01-27 15:11:57,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-01-27 15:11:57,601 INFO L175 Difference]: Start difference. First operand has 74 places, 42 transitions, 316 flow. Second operand 253 states and 3696 transitions. [2024-01-27 15:11:57,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 2295 transitions, 16226 flow [2024-01-27 15:11:57,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2295 transitions, 16154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:11:57,687 INFO L231 Difference]: Finished difference. Result has 465 places, 557 transitions, 6998 flow [2024-01-27 15:11:57,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=253, PETRI_FLOW=6998, PETRI_PLACES=465, PETRI_TRANSITIONS=557} [2024-01-27 15:11:57,690 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 443 predicate places. [2024-01-27 15:11:57,690 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 557 transitions, 6998 flow [2024-01-27 15:11:57,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 10.090909090909092) internal successors, (333), 33 states have internal predecessors, (333), 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 15:11:57,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:11:57,691 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:11:57,724 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 15:11:57,906 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 15:11:57,907 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:11:57,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:11:57,908 INFO L85 PathProgramCache]: Analyzing trace with hash -418367028, now seen corresponding path program 7 times [2024-01-27 15:11:57,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:11:57,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669723326] [2024-01-27 15:11:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:11:57,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:11:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:11:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-01-27 15:11:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:11:58,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669723326] [2024-01-27 15:11:58,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669723326] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:11:58,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561089443] [2024-01-27 15:11:58,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:11:58,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:11:58,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:11:58,331 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 15:11:58,354 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 15:11:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:11:58,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:11:58,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:11:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-01-27 15:11:58,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:11:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 20 proven. 286 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-01-27 15:11:58,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561089443] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:11:58,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:11:58,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2024-01-27 15:11:58,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128178416] [2024-01-27 15:11:58,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:11:58,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:11:58,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:11:58,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:11:58,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:11:58,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:11:58,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 557 transitions, 6998 flow. Second operand has 23 states, 23 states have (on average 10.0) internal successors, (230), 23 states have internal predecessors, (230), 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 15:11:58,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:11:58,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:11:58,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:03,743 INFO L124 PetriNetUnfolderBase]: 5333/12525 cut-off events. [2024-01-27 15:12:03,743 INFO L125 PetriNetUnfolderBase]: For 1306669/1306669 co-relation queries the response was YES. [2024-01-27 15:12:03,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71347 conditions, 12525 events. 5333/12525 cut-off events. For 1306669/1306669 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 82527 event pairs, 310 based on Foata normal form. 747/13254 useless extension candidates. Maximal degree in co-relation 66323. Up to 2163 conditions per place. [2024-01-27 15:12:03,899 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 610 selfloop transitions, 442 changer transitions 0/1069 dead transitions. [2024-01-27 15:12:03,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1069 transitions, 19162 flow [2024-01-27 15:12:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:12:03,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:12:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 352 transitions. [2024-01-27 15:12:03,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-01-27 15:12:03,901 INFO L175 Difference]: Start difference. First operand has 465 places, 557 transitions, 6998 flow. Second operand 22 states and 352 transitions. [2024-01-27 15:12:03,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1069 transitions, 19162 flow [2024-01-27 15:12:08,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 1069 transitions, 18406 flow, removed 0 selfloop flow, removed 18 redundant places. [2024-01-27 15:12:08,125 INFO L231 Difference]: Finished difference. Result has 478 places, 726 transitions, 9756 flow [2024-01-27 15:12:08,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6404, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9756, PETRI_PLACES=478, PETRI_TRANSITIONS=726} [2024-01-27 15:12:08,126 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 456 predicate places. [2024-01-27 15:12:08,126 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 726 transitions, 9756 flow [2024-01-27 15:12:08,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.0) internal successors, (230), 23 states have internal predecessors, (230), 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 15:12:08,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:08,135 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:08,149 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 15:12:08,349 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 15:12:08,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:12:08,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:08,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1518909461, now seen corresponding path program 8 times [2024-01-27 15:12:08,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:08,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976744901] [2024-01-27 15:12:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:08,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:10,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:10,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976744901] [2024-01-27 15:12:10,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976744901] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:12:10,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781469067] [2024-01-27 15:12:10,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:12:10,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:12:10,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:12:10,573 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 15:12:10,574 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 15:12:10,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:12:10,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:12:10,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 125 conjunts are in the unsatisfiable core [2024-01-27 15:12:10,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:12:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:10,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:12:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 0 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:11,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781469067] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:12:11,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:12:11,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2024-01-27 15:12:11,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544207762] [2024-01-27 15:12:11,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:12:11,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-01-27 15:12:11,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-01-27 15:12:11,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2024-01-27 15:12:11,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-01-27 15:12:11,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 726 transitions, 9756 flow. Second operand has 45 states, 45 states have (on average 7.8) internal successors, (351), 45 states have internal predecessors, (351), 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 15:12:11,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:11,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-01-27 15:12:11,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:29,316 INFO L124 PetriNetUnfolderBase]: 9424/24286 cut-off events. [2024-01-27 15:12:29,316 INFO L125 PetriNetUnfolderBase]: For 9171847/9171847 co-relation queries the response was YES. [2024-01-27 15:12:29,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282302 conditions, 24286 events. 9424/24286 cut-off events. For 9171847/9171847 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 194472 event pairs, 1193 based on Foata normal form. 1/24287 useless extension candidates. Maximal degree in co-relation 229389. Up to 4320 conditions per place. [2024-01-27 15:12:29,983 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 2887 selfloop transitions, 83 changer transitions 2/2992 dead transitions. [2024-01-27 15:12:29,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2992 transitions, 49655 flow [2024-01-27 15:12:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:12:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:12:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 644 transitions. [2024-01-27 15:12:29,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098484848484849 [2024-01-27 15:12:29,985 INFO L175 Difference]: Start difference. First operand has 478 places, 726 transitions, 9756 flow. Second operand 44 states and 644 transitions. [2024-01-27 15:12:29,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2992 transitions, 49655 flow [2024-01-27 15:13:50,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 2992 transitions, 48049 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-01-27 15:13:50,742 INFO L231 Difference]: Finished difference. Result has 512 places, 808 transitions, 9636 flow [2024-01-27 15:13:50,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9294, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9636, PETRI_PLACES=512, PETRI_TRANSITIONS=808} [2024-01-27 15:13:50,744 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 490 predicate places. [2024-01-27 15:13:50,744 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 808 transitions, 9636 flow [2024-01-27 15:13:50,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 7.8) internal successors, (351), 45 states have internal predecessors, (351), 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 15:13:50,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:13:50,744 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:13:50,759 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 15:13:50,957 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 15:13:50,957 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:13:50,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:13:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash 813455235, now seen corresponding path program 9 times [2024-01-27 15:13:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:13:50,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015851837] [2024-01-27 15:13:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:13:50,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:13:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:13:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 975 proven. 96 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2024-01-27 15:13:51,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:13:51,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015851837] [2024-01-27 15:13:51,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015851837] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:13:51,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282548825] [2024-01-27 15:13:51,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:13:51,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:13:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:13:51,577 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 15:13:51,593 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 15:13:52,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-01-27 15:13:52,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:13:52,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:13:52,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:13:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 1071 proven. 0 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2024-01-27 15:13:52,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:13:52,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282548825] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:13:52,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:13:52,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2024-01-27 15:13:52,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670503985] [2024-01-27 15:13:52,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:13:52,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:13:52,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:13:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:13:52,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:13:52,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:13:52,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 808 transitions, 9636 flow. Second operand has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 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 15:13:52,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:13:52,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:13:52,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:00,216 INFO L124 PetriNetUnfolderBase]: 9149/21066 cut-off events. [2024-01-27 15:14:00,217 INFO L125 PetriNetUnfolderBase]: For 1899954/1899954 co-relation queries the response was YES. [2024-01-27 15:14:00,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165919 conditions, 21066 events. 9149/21066 cut-off events. For 1899954/1899954 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 157542 event pairs, 137 based on Foata normal form. 89/21155 useless extension candidates. Maximal degree in co-relation 165734. Up to 4121 conditions per place. [2024-01-27 15:14:00,754 INFO L140 encePairwiseOnDemand]: 21/24 looper letters, 1957 selfloop transitions, 252 changer transitions 0/2215 dead transitions. [2024-01-27 15:14:00,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 2215 transitions, 21690 flow [2024-01-27 15:14:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:14:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:14:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 354 transitions. [2024-01-27 15:14:00,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-01-27 15:14:00,756 INFO L175 Difference]: Start difference. First operand has 512 places, 808 transitions, 9636 flow. Second operand 23 states and 354 transitions. [2024-01-27 15:14:00,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 2215 transitions, 21690 flow [2024-01-27 15:14:16,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 2215 transitions, 21688 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:16,873 INFO L231 Difference]: Finished difference. Result has 532 places, 796 transitions, 9970 flow [2024-01-27 15:14:16,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9466, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9970, PETRI_PLACES=532, PETRI_TRANSITIONS=796} [2024-01-27 15:14:16,874 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 510 predicate places. [2024-01-27 15:14:16,874 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 796 transitions, 9970 flow [2024-01-27 15:14:16,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 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 15:14:16,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:16,875 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:16,887 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 15:14:17,079 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 15:14:17,079 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:14:17,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:17,080 INFO L85 PathProgramCache]: Analyzing trace with hash -467363700, now seen corresponding path program 10 times [2024-01-27 15:14:17,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:17,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806377355] [2024-01-27 15:14:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:17,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 975 proven. 96 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2024-01-27 15:14:17,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806377355] [2024-01-27 15:14:17,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806377355] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409251055] [2024-01-27 15:14:17,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:14:17,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:17,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:17,552 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 15:14:17,554 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 15:14:17,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:14:17,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:17,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:14:17,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 1071 proven. 0 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2024-01-27 15:14:17,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:14:17,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409251055] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:17,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:14:17,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2024-01-27 15:14:17,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060563962] [2024-01-27 15:14:17,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:17,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:14:17,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:17,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:14:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:14:17,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:14:17,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 796 transitions, 9970 flow. Second operand has 23 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 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 15:14:17,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:17,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:14:17,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:22,875 INFO L124 PetriNetUnfolderBase]: 5174/12275 cut-off events. [2024-01-27 15:14:22,875 INFO L125 PetriNetUnfolderBase]: For 1012037/1012037 co-relation queries the response was YES.