./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.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/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.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 6aeaf730cbe4eb831d189bfd9925d1660c7714b9e685f389bc2495c0943d6472 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:12:18,354 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:12:18,441 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:12:18,447 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:12:18,447 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:12:18,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:12:18,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:12:18,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:12:18,474 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:12:18,477 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:12:18,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:12:18,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:12:18,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:12:18,479 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:12:18,479 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:12:18,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:12:18,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:12:18,480 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:12:18,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:12:18,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:12:18,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:12:18,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:12:18,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:12:18,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:12:18,482 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:12:18,482 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:12:18,482 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:12:18,482 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:12:18,483 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:12:18,483 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:12:18,484 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:12:18,484 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:12:18,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:12:18,485 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:12:18,485 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:12:18,485 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:12:18,485 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:12:18,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:12:18,486 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:12:18,486 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:12:18,486 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:12:18,486 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:12:18,486 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:12:18,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6aeaf730cbe4eb831d189bfd9925d1660c7714b9e685f389bc2495c0943d6472 [2024-01-27 15:12:18,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:12:18,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:12:18,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:12:18,718 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:12:18,718 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:12:18,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2024-01-27 15:12:19,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:12:20,047 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:12:20,049 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2024-01-27 15:12:20,059 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5963b1b53/63cd1260107441c3b317c4c7e9099549/FLAGd9eaa110c [2024-01-27 15:12:20,068 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5963b1b53/63cd1260107441c3b317c4c7e9099549 [2024-01-27 15:12:20,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:12:20,071 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:12:20,072 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:12:20,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:12:20,075 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:12:20,076 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b0440c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20, skipping insertion in model container [2024-01-27 15:12:20,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,106 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:12:20,215 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i[1115,1128] [2024-01-27 15:12:20,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:12:20,369 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:12:20,384 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i[1115,1128] [2024-01-27 15:12:20,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:12:20,432 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:12:20,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20 WrapperNode [2024-01-27 15:12:20,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:12:20,433 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:12:20,433 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:12:20,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:12:20,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,468 INFO L138 Inliner]: procedures = 166, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 123 [2024-01-27 15:12:20,472 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:12:20,473 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:12:20,473 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:12:20,473 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:12:20,481 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,489 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,508 INFO L175 MemorySlicer]: Split 19 memory accesses to 3 slices as follows [2, 1, 16]. 84 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 0, 6]. The 4 writes are split as follows [0, 1, 3]. [2024-01-27 15:12:20,508 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,509 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,514 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,519 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,520 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,522 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:12:20,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:12:20,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:12:20,523 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:12:20,523 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (1/1) ... [2024-01-27 15:12:20,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:12:20,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:12:20,552 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 15:12:20,558 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 15:12:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:12:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:12:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:12:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2024-01-27 15:12:20,636 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2024-01-27 15:12:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:12:20,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:12:20,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:12:20,638 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 15:12:20,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:12:20,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:12:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:12:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:12:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:12:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:12:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 15:12:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:12:20,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:12:20,644 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 15:12:20,781 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:12:20,782 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:12:20,957 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:12:20,957 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:12:21,140 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:12:21,141 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:12:21,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:12:21 BoogieIcfgContainer [2024-01-27 15:12:21,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:12:21,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:12:21,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:12:21,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:12:21,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:12:20" (1/3) ... [2024-01-27 15:12:21,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5074881b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:12:21, skipping insertion in model container [2024-01-27 15:12:21,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:12:20" (2/3) ... [2024-01-27 15:12:21,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5074881b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:12:21, skipping insertion in model container [2024-01-27 15:12:21,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:12:21" (3/3) ... [2024-01-27 15:12:21,151 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2024-01-27 15:12:21,157 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:12:21,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:12:21,166 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-27 15:12:21,166 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:12:21,208 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:12:21,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 37 transitions, 78 flow [2024-01-27 15:12:21,275 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-01-27 15:12:21,276 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:12:21,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 7/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2024-01-27 15:12:21,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 37 transitions, 78 flow [2024-01-27 15:12:21,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 36 transitions, 75 flow [2024-01-27 15:12:21,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:12:21,313 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;@5a6913dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:12:21,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:12:21,330 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:12:21,330 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2024-01-27 15:12:21,330 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:12:21,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:21,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:21,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:21,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1527428138, now seen corresponding path program 1 times [2024-01-27 15:12:21,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:21,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532409274] [2024-01-27 15:12:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:21,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:21,894 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 15:12:21,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:21,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532409274] [2024-01-27 15:12:21,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532409274] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:21,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:21,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:12:21,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934816310] [2024-01-27 15:12:21,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:21,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:12:21,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:21,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:12:21,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:12:21,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-01-27 15:12:21,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 36 transitions, 75 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 15:12:21,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:21,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-01-27 15:12:21,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:22,235 INFO L124 PetriNetUnfolderBase]: 218/450 cut-off events. [2024-01-27 15:12:22,235 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:12:22,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 450 events. 218/450 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1932 event pairs, 20 based on Foata normal form. 37/406 useless extension candidates. Maximal degree in co-relation 851. Up to 241 conditions per place. [2024-01-27 15:12:22,243 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 47 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-01-27 15:12:22,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 69 transitions, 265 flow [2024-01-27 15:12:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:12:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:12:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-01-27 15:12:22,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536036036036036 [2024-01-27 15:12:22,262 INFO L175 Difference]: Start difference. First operand has 33 places, 36 transitions, 75 flow. Second operand 6 states and 119 transitions. [2024-01-27 15:12:22,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 69 transitions, 265 flow [2024-01-27 15:12:22,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 69 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:12:22,271 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 168 flow [2024-01-27 15:12:22,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2024-01-27 15:12:22,277 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2024-01-27 15:12:22,278 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 168 flow [2024-01-27 15:12:22,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 15:12:22,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:22,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:22,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:12:22,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:22,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash 105601573, now seen corresponding path program 1 times [2024-01-27 15:12:22,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:22,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243528361] [2024-01-27 15:12:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:22,473 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 15:12:22,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:22,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243528361] [2024-01-27 15:12:22,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243528361] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:22,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:22,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:12:22,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676727890] [2024-01-27 15:12:22,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:22,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:12:22,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:12:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:12:22,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:12:22,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 15:12:22,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:22,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:12:22,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:22,659 INFO L124 PetriNetUnfolderBase]: 278/559 cut-off events. [2024-01-27 15:12:22,659 INFO L125 PetriNetUnfolderBase]: For 185/187 co-relation queries the response was YES. [2024-01-27 15:12:22,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 559 events. 278/559 cut-off events. For 185/187 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2448 event pairs, 60 based on Foata normal form. 20/538 useless extension candidates. Maximal degree in co-relation 1382. Up to 303 conditions per place. [2024-01-27 15:12:22,666 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 58 selfloop transitions, 25 changer transitions 0/89 dead transitions. [2024-01-27 15:12:22,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 89 transitions, 474 flow [2024-01-27 15:12:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:12:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:12:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-01-27 15:12:22,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-01-27 15:12:22,672 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 168 flow. Second operand 6 states and 108 transitions. [2024-01-27 15:12:22,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 89 transitions, 474 flow [2024-01-27 15:12:22,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 89 transitions, 474 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:12:22,680 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 366 flow [2024-01-27 15:12:22,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2024-01-27 15:12:22,691 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2024-01-27 15:12:22,691 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 366 flow [2024-01-27 15:12:22,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 15:12:22,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:22,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:22,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:12:22,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:22,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash -185836180, now seen corresponding path program 1 times [2024-01-27 15:12:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:22,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729711120] [2024-01-27 15:12:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:22,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:22,893 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 15:12:22,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:22,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729711120] [2024-01-27 15:12:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729711120] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:22,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:22,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:12:22,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449832975] [2024-01-27 15:12:22,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:22,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:12:22,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:22,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:12:22,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:12:22,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-27 15:12:22,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 366 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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 15:12:22,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:22,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-27 15:12:22,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:23,148 INFO L124 PetriNetUnfolderBase]: 399/859 cut-off events. [2024-01-27 15:12:23,149 INFO L125 PetriNetUnfolderBase]: For 1246/1263 co-relation queries the response was YES. [2024-01-27 15:12:23,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2742 conditions, 859 events. 399/859 cut-off events. For 1246/1263 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4790 event pairs, 87 based on Foata normal form. 16/819 useless extension candidates. Maximal degree in co-relation 2722. Up to 360 conditions per place. [2024-01-27 15:12:23,154 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 87 selfloop transitions, 27 changer transitions 0/127 dead transitions. [2024-01-27 15:12:23,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 127 transitions, 942 flow [2024-01-27 15:12:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:12:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:12:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-01-27 15:12:23,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138996138996139 [2024-01-27 15:12:23,159 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 366 flow. Second operand 7 states and 159 transitions. [2024-01-27 15:12:23,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 127 transitions, 942 flow [2024-01-27 15:12:23,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 127 transitions, 942 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:12:23,171 INFO L231 Difference]: Finished difference. Result has 60 places, 76 transitions, 588 flow [2024-01-27 15:12:23,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=60, PETRI_TRANSITIONS=76} [2024-01-27 15:12:23,173 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2024-01-27 15:12:23,173 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 76 transitions, 588 flow [2024-01-27 15:12:23,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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 15:12:23,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:23,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:23,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:12:23,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:23,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:23,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1168126682, now seen corresponding path program 2 times [2024-01-27 15:12:23,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:23,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062594370] [2024-01-27 15:12:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:23,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:23,429 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 15:12:23,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:23,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062594370] [2024-01-27 15:12:23,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062594370] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:23,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:23,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:12:23,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865419286] [2024-01-27 15:12:23,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:23,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:12:23,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:23,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:12:23,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:12:23,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-01-27 15:12:23,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 76 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 15:12:23,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:23,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-01-27 15:12:23,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:23,720 INFO L124 PetriNetUnfolderBase]: 468/945 cut-off events. [2024-01-27 15:12:23,721 INFO L125 PetriNetUnfolderBase]: For 2019/2050 co-relation queries the response was YES. [2024-01-27 15:12:23,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3468 conditions, 945 events. 468/945 cut-off events. For 2019/2050 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4969 event pairs, 99 based on Foata normal form. 32/971 useless extension candidates. Maximal degree in co-relation 3443. Up to 583 conditions per place. [2024-01-27 15:12:23,728 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 67 selfloop transitions, 61 changer transitions 0/136 dead transitions. [2024-01-27 15:12:23,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 136 transitions, 1241 flow [2024-01-27 15:12:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:12:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:12:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 196 transitions. [2024-01-27 15:12:23,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074844074844075 [2024-01-27 15:12:23,730 INFO L175 Difference]: Start difference. First operand has 60 places, 76 transitions, 588 flow. Second operand 13 states and 196 transitions. [2024-01-27 15:12:23,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 136 transitions, 1241 flow [2024-01-27 15:12:23,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 136 transitions, 1205 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:12:23,739 INFO L231 Difference]: Finished difference. Result has 73 places, 108 transitions, 999 flow [2024-01-27 15:12:23,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=999, PETRI_PLACES=73, PETRI_TRANSITIONS=108} [2024-01-27 15:12:23,740 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 40 predicate places. [2024-01-27 15:12:23,740 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 108 transitions, 999 flow [2024-01-27 15:12:23,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 15:12:23,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:23,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:23,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:12:23,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:23,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash -48524802, now seen corresponding path program 3 times [2024-01-27 15:12:23,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:23,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396549992] [2024-01-27 15:12:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:23,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:23,891 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 15:12:23,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:23,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396549992] [2024-01-27 15:12:23,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396549992] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:23,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:23,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:12:23,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988825642] [2024-01-27 15:12:23,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:23,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:12:23,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:23,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:12:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:12:23,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-27 15:12:23,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 108 transitions, 999 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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 15:12:23,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:23,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-27 15:12:23,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:24,141 INFO L124 PetriNetUnfolderBase]: 553/1190 cut-off events. [2024-01-27 15:12:24,141 INFO L125 PetriNetUnfolderBase]: For 3309/3333 co-relation queries the response was YES. [2024-01-27 15:12:24,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4689 conditions, 1190 events. 553/1190 cut-off events. For 3309/3333 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7044 event pairs, 163 based on Foata normal form. 16/1203 useless extension candidates. Maximal degree in co-relation 4661. Up to 592 conditions per place. [2024-01-27 15:12:24,150 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 116 selfloop transitions, 42 changer transitions 0/173 dead transitions. [2024-01-27 15:12:24,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 173 transitions, 1724 flow [2024-01-27 15:12:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:12:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:12:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-01-27 15:12:24,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640926640926641 [2024-01-27 15:12:24,152 INFO L175 Difference]: Start difference. First operand has 73 places, 108 transitions, 999 flow. Second operand 7 states and 166 transitions. [2024-01-27 15:12:24,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 173 transitions, 1724 flow [2024-01-27 15:12:24,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 173 transitions, 1640 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:12:24,168 INFO L231 Difference]: Finished difference. Result has 78 places, 115 transitions, 1110 flow [2024-01-27 15:12:24,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1110, PETRI_PLACES=78, PETRI_TRANSITIONS=115} [2024-01-27 15:12:24,170 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 45 predicate places. [2024-01-27 15:12:24,172 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 115 transitions, 1110 flow [2024-01-27 15:12:24,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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 15:12:24,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:24,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:24,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:12:24,173 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:24,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash -932033232, now seen corresponding path program 4 times [2024-01-27 15:12:24,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:24,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407308950] [2024-01-27 15:12:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:24,453 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 15:12:24,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:24,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407308950] [2024-01-27 15:12:24,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407308950] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:24,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:24,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:12:24,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544355435] [2024-01-27 15:12:24,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:24,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:12:24,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:12:24,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:12:24,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-01-27 15:12:24,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 115 transitions, 1110 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 15:12:24,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:24,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-01-27 15:12:24,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:24,800 INFO L124 PetriNetUnfolderBase]: 593/1217 cut-off events. [2024-01-27 15:12:24,800 INFO L125 PetriNetUnfolderBase]: For 3498/3537 co-relation queries the response was YES. [2024-01-27 15:12:24,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4942 conditions, 1217 events. 593/1217 cut-off events. For 3498/3537 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6447 event pairs, 175 based on Foata normal form. 44/1252 useless extension candidates. Maximal degree in co-relation 4911. Up to 803 conditions per place. [2024-01-27 15:12:24,808 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 76 selfloop transitions, 61 changer transitions 0/146 dead transitions. [2024-01-27 15:12:24,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 146 transitions, 1503 flow [2024-01-27 15:12:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:12:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:12:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-01-27 15:12:24,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42792792792792794 [2024-01-27 15:12:24,810 INFO L175 Difference]: Start difference. First operand has 78 places, 115 transitions, 1110 flow. Second operand 12 states and 190 transitions. [2024-01-27 15:12:24,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 146 transitions, 1503 flow [2024-01-27 15:12:24,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 146 transitions, 1427 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-01-27 15:12:24,822 INFO L231 Difference]: Finished difference. Result has 88 places, 119 transitions, 1197 flow [2024-01-27 15:12:24,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1197, PETRI_PLACES=88, PETRI_TRANSITIONS=119} [2024-01-27 15:12:24,823 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2024-01-27 15:12:24,823 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 119 transitions, 1197 flow [2024-01-27 15:12:24,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 15:12:24,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:24,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:24,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:12:24,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:24,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash 825215878, now seen corresponding path program 5 times [2024-01-27 15:12:24,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:24,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438863333] [2024-01-27 15:12:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:24,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:24,942 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 15:12:24,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:24,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438863333] [2024-01-27 15:12:24,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438863333] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:24,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:24,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:12:24,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646083318] [2024-01-27 15:12:24,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:24,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:12:24,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:12:24,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:12:24,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-27 15:12:24,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 119 transitions, 1197 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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 15:12:24,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:24,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-27 15:12:24,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:25,265 INFO L124 PetriNetUnfolderBase]: 640/1407 cut-off events. [2024-01-27 15:12:25,265 INFO L125 PetriNetUnfolderBase]: For 4902/4928 co-relation queries the response was YES. [2024-01-27 15:12:25,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5939 conditions, 1407 events. 640/1407 cut-off events. For 4902/4928 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7977 event pairs, 171 based on Foata normal form. 14/1418 useless extension candidates. Maximal degree in co-relation 5905. Up to 522 conditions per place. [2024-01-27 15:12:25,277 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 134 selfloop transitions, 40 changer transitions 0/190 dead transitions. [2024-01-27 15:12:25,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 190 transitions, 2011 flow [2024-01-27 15:12:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:12:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:12:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-01-27 15:12:25,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-01-27 15:12:25,279 INFO L175 Difference]: Start difference. First operand has 88 places, 119 transitions, 1197 flow. Second operand 7 states and 168 transitions. [2024-01-27 15:12:25,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 190 transitions, 2011 flow [2024-01-27 15:12:25,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 190 transitions, 1899 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-01-27 15:12:25,297 INFO L231 Difference]: Finished difference. Result has 89 places, 127 transitions, 1317 flow [2024-01-27 15:12:25,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1317, PETRI_PLACES=89, PETRI_TRANSITIONS=127} [2024-01-27 15:12:25,298 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 56 predicate places. [2024-01-27 15:12:25,299 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 127 transitions, 1317 flow [2024-01-27 15:12:25,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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 15:12:25,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:25,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:25,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:12:25,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:25,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1721337388, now seen corresponding path program 6 times [2024-01-27 15:12:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:25,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355169804] [2024-01-27 15:12:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:25,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:25,522 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 15:12:25,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:25,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355169804] [2024-01-27 15:12:25,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355169804] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:25,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:25,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:12:25,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957532542] [2024-01-27 15:12:25,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:25,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:12:25,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:25,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:12:25,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:12:25,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-01-27 15:12:25,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 127 transitions, 1317 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 15:12:25,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:25,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-01-27 15:12:25,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:25,842 INFO L124 PetriNetUnfolderBase]: 706/1472 cut-off events. [2024-01-27 15:12:25,843 INFO L125 PetriNetUnfolderBase]: For 5046/5082 co-relation queries the response was YES. [2024-01-27 15:12:25,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6208 conditions, 1472 events. 706/1472 cut-off events. For 5046/5082 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7985 event pairs, 218 based on Foata normal form. 41/1507 useless extension candidates. Maximal degree in co-relation 6171. Up to 992 conditions per place. [2024-01-27 15:12:25,853 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 80 selfloop transitions, 70 changer transitions 0/160 dead transitions. [2024-01-27 15:12:25,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 160 transitions, 1830 flow [2024-01-27 15:12:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:12:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:12:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-01-27 15:12:25,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2024-01-27 15:12:25,855 INFO L175 Difference]: Start difference. First operand has 89 places, 127 transitions, 1317 flow. Second operand 9 states and 150 transitions. [2024-01-27 15:12:25,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 160 transitions, 1830 flow [2024-01-27 15:12:25,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 160 transitions, 1744 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-01-27 15:12:25,871 INFO L231 Difference]: Finished difference. Result has 98 places, 138 transitions, 1567 flow [2024-01-27 15:12:25,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1567, PETRI_PLACES=98, PETRI_TRANSITIONS=138} [2024-01-27 15:12:25,872 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 65 predicate places. [2024-01-27 15:12:25,872 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 138 transitions, 1567 flow [2024-01-27 15:12:25,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 15:12:25,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:25,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:25,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:12:25,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:25,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:25,874 INFO L85 PathProgramCache]: Analyzing trace with hash -81796838, now seen corresponding path program 7 times [2024-01-27 15:12:25,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:25,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618524450] [2024-01-27 15:12:25,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:25,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:26,089 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 15:12:26,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618524450] [2024-01-27 15:12:26,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618524450] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:26,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:26,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:12:26,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023813915] [2024-01-27 15:12:26,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:26,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:12:26,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:12:26,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:12:26,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:12:26,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 138 transitions, 1567 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 15:12:26,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:26,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:12:26,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:26,453 INFO L124 PetriNetUnfolderBase]: 618/1288 cut-off events. [2024-01-27 15:12:26,454 INFO L125 PetriNetUnfolderBase]: For 4270/4274 co-relation queries the response was YES. [2024-01-27 15:12:26,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5425 conditions, 1288 events. 618/1288 cut-off events. For 4270/4274 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6740 event pairs, 222 based on Foata normal form. 12/1299 useless extension candidates. Maximal degree in co-relation 5384. Up to 924 conditions per place. [2024-01-27 15:12:26,463 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 89 selfloop transitions, 47 changer transitions 0/142 dead transitions. [2024-01-27 15:12:26,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 1602 flow [2024-01-27 15:12:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:12:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:12:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-01-27 15:12:26,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2024-01-27 15:12:26,465 INFO L175 Difference]: Start difference. First operand has 98 places, 138 transitions, 1567 flow. Second operand 10 states and 160 transitions. [2024-01-27 15:12:26,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 1602 flow [2024-01-27 15:12:26,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 1526 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-01-27 15:12:26,480 INFO L231 Difference]: Finished difference. Result has 102 places, 117 transitions, 1238 flow [2024-01-27 15:12:26,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1238, PETRI_PLACES=102, PETRI_TRANSITIONS=117} [2024-01-27 15:12:26,481 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 69 predicate places. [2024-01-27 15:12:26,482 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 117 transitions, 1238 flow [2024-01-27 15:12:26,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 15:12:26,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:26,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:26,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:12:26,482 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:26,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1840200311, now seen corresponding path program 1 times [2024-01-27 15:12:26,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:26,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483786560] [2024-01-27 15:12:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:26,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:26,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:26,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483786560] [2024-01-27 15:12:26,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483786560] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:12:26,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465567831] [2024-01-27 15:12:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:26,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:12:26,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:12:26,774 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 15:12:26,803 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 15:12:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:26,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:12:26,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:12:27,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2024-01-27 15:12:27,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:12:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:27,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:12:27,283 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-01-27 15:12:27,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 1 [2024-01-27 15:12:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:27,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465567831] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:12:27,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:12:27,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 21 [2024-01-27 15:12:27,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450302581] [2024-01-27 15:12:27,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:27,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:12:27,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:27,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:12:27,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:12:27,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-01-27 15:12:27,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 117 transitions, 1238 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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 15:12:27,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:27,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-01-27 15:12:27,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:27,701 INFO L124 PetriNetUnfolderBase]: 1032/2168 cut-off events. [2024-01-27 15:12:27,701 INFO L125 PetriNetUnfolderBase]: For 7145/7173 co-relation queries the response was YES. [2024-01-27 15:12:27,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8977 conditions, 2168 events. 1032/2168 cut-off events. For 7145/7173 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13262 event pairs, 90 based on Foata normal form. 24/2187 useless extension candidates. Maximal degree in co-relation 8936. Up to 464 conditions per place. [2024-01-27 15:12:27,718 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 123 selfloop transitions, 104 changer transitions 0/241 dead transitions. [2024-01-27 15:12:27,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 241 transitions, 2670 flow [2024-01-27 15:12:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:12:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:12:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-01-27 15:12:27,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444015444015444 [2024-01-27 15:12:27,719 INFO L175 Difference]: Start difference. First operand has 102 places, 117 transitions, 1238 flow. Second operand 7 states and 141 transitions. [2024-01-27 15:12:27,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 241 transitions, 2670 flow [2024-01-27 15:12:27,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 241 transitions, 2500 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-01-27 15:12:27,739 INFO L231 Difference]: Finished difference. Result has 103 places, 186 transitions, 2133 flow [2024-01-27 15:12:27,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2133, PETRI_PLACES=103, PETRI_TRANSITIONS=186} [2024-01-27 15:12:27,739 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 70 predicate places. [2024-01-27 15:12:27,740 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 186 transitions, 2133 flow [2024-01-27 15:12:27,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 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 15:12:27,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:27,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:27,761 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 15:12:27,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-27 15:12:27,952 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:27,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:27,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1409797973, now seen corresponding path program 2 times [2024-01-27 15:12:27,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:27,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612627274] [2024-01-27 15:12:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:27,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:28,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612627274] [2024-01-27 15:12:28,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612627274] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:12:28,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97599850] [2024-01-27 15:12:28,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:12:28,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:12:28,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:12:28,263 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 15:12:28,284 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 15:12:28,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 15:12:28,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:12:28,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:12:28,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:12:28,399 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-01-27 15:12:28,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 43 [2024-01-27 15:12:28,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:12:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:12:28,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:12:28,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97599850] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:28,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:12:28,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2024-01-27 15:12:28,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794766808] [2024-01-27 15:12:28,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:28,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:12:28,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:12:28,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:12:28,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-01-27 15:12:28,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 186 transitions, 2133 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 15:12:28,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:28,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-01-27 15:12:28,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:28,837 INFO L124 PetriNetUnfolderBase]: 968/2050 cut-off events. [2024-01-27 15:12:28,838 INFO L125 PetriNetUnfolderBase]: For 9555/9587 co-relation queries the response was YES. [2024-01-27 15:12:28,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9769 conditions, 2050 events. 968/2050 cut-off events. For 9555/9587 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12363 event pairs, 166 based on Foata normal form. 64/2113 useless extension candidates. Maximal degree in co-relation 9725. Up to 877 conditions per place. [2024-01-27 15:12:28,849 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 98 selfloop transitions, 106 changer transitions 0/217 dead transitions. [2024-01-27 15:12:28,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 217 transitions, 2743 flow [2024-01-27 15:12:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:12:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:12:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-01-27 15:12:28,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4918918918918919 [2024-01-27 15:12:28,850 INFO L175 Difference]: Start difference. First operand has 103 places, 186 transitions, 2133 flow. Second operand 5 states and 91 transitions. [2024-01-27 15:12:28,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 217 transitions, 2743 flow [2024-01-27 15:12:28,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 217 transitions, 2677 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-01-27 15:12:28,869 INFO L231 Difference]: Finished difference. Result has 104 places, 184 transitions, 2279 flow [2024-01-27 15:12:28,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2279, PETRI_PLACES=104, PETRI_TRANSITIONS=184} [2024-01-27 15:12:28,870 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 71 predicate places. [2024-01-27 15:12:28,870 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 184 transitions, 2279 flow [2024-01-27 15:12:28,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 15:12:28,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:28,871 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:28,882 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 15:12:29,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-27 15:12:29,082 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:29,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:29,083 INFO L85 PathProgramCache]: Analyzing trace with hash 858224508, now seen corresponding path program 1 times [2024-01-27 15:12:29,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:29,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339598929] [2024-01-27 15:12:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:29,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:29,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:29,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339598929] [2024-01-27 15:12:29,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339598929] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:29,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:12:29,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:12:29,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793953122] [2024-01-27 15:12:29,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:29,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:12:29,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:12:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:12:29,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-27 15:12:29,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 184 transitions, 2279 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:12:29,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:29,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-27 15:12:29,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:29,399 INFO L124 PetriNetUnfolderBase]: 908/1930 cut-off events. [2024-01-27 15:12:29,399 INFO L125 PetriNetUnfolderBase]: For 9550/9574 co-relation queries the response was YES. [2024-01-27 15:12:29,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 1930 events. 908/1930 cut-off events. For 9550/9574 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 11178 event pairs, 372 based on Foata normal form. 6/1924 useless extension candidates. Maximal degree in co-relation 9187. Up to 1609 conditions per place. [2024-01-27 15:12:29,409 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 124 selfloop transitions, 8 changer transitions 20/161 dead transitions. [2024-01-27 15:12:29,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 161 transitions, 2137 flow [2024-01-27 15:12:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:12:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:12:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-01-27 15:12:29,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2024-01-27 15:12:29,411 INFO L175 Difference]: Start difference. First operand has 104 places, 184 transitions, 2279 flow. Second operand 5 states and 95 transitions. [2024-01-27 15:12:29,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 161 transitions, 2137 flow [2024-01-27 15:12:29,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1993 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-01-27 15:12:29,427 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1506 flow [2024-01-27 15:12:29,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1506, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2024-01-27 15:12:29,428 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 74 predicate places. [2024-01-27 15:12:29,428 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1506 flow [2024-01-27 15:12:29,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:12:29,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:29,428 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:29,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:12:29,428 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:29,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:29,429 INFO L85 PathProgramCache]: Analyzing trace with hash -443008480, now seen corresponding path program 1 times [2024-01-27 15:12:29,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:29,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973439130] [2024-01-27 15:12:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:29,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973439130] [2024-01-27 15:12:29,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973439130] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:12:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854749799] [2024-01-27 15:12:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:29,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:12:29,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:12:29,641 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 15:12:29,683 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 15:12:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:29,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:12:29,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:12:29,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-01-27 15:12:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:29,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:12:30,156 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-01-27 15:12:30,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 55 [2024-01-27 15:12:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:30,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854749799] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:12:30,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:12:30,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2024-01-27 15:12:30,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669046024] [2024-01-27 15:12:30,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:12:30,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:12:30,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:12:30,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:12:30,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:12:30,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1506 flow. Second operand has 25 states, 25 states have (on average 9.48) internal successors, (237), 25 states have internal predecessors, (237), 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 15:12:30,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:30,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:12:30,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:31,416 INFO L124 PetriNetUnfolderBase]: 1552/3135 cut-off events. [2024-01-27 15:12:31,416 INFO L125 PetriNetUnfolderBase]: For 13805/13805 co-relation queries the response was YES. [2024-01-27 15:12:31,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14242 conditions, 3135 events. 1552/3135 cut-off events. For 13805/13805 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 19059 event pairs, 325 based on Foata normal form. 58/3192 useless extension candidates. Maximal degree in co-relation 14195. Up to 985 conditions per place. [2024-01-27 15:12:31,435 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 176 selfloop transitions, 205 changer transitions 16/402 dead transitions. [2024-01-27 15:12:31,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 402 transitions, 4321 flow [2024-01-27 15:12:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:12:31,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:12:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 431 transitions. [2024-01-27 15:12:31,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016775396085741 [2024-01-27 15:12:31,438 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1506 flow. Second operand 29 states and 431 transitions. [2024-01-27 15:12:31,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 402 transitions, 4321 flow [2024-01-27 15:12:31,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 402 transitions, 4153 flow, removed 29 selfloop flow, removed 18 redundant places. [2024-01-27 15:12:31,465 INFO L231 Difference]: Finished difference. Result has 125 places, 244 transitions, 3367 flow [2024-01-27 15:12:31,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3367, PETRI_PLACES=125, PETRI_TRANSITIONS=244} [2024-01-27 15:12:31,467 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 92 predicate places. [2024-01-27 15:12:31,467 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 244 transitions, 3367 flow [2024-01-27 15:12:31,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.48) internal successors, (237), 25 states have internal predecessors, (237), 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 15:12:31,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:31,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:31,490 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 15:12:31,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:12:31,679 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:31,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash -65551936, now seen corresponding path program 1 times [2024-01-27 15:12:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:31,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095729852] [2024-01-27 15:12:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:31,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:32,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:32,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095729852] [2024-01-27 15:12:32,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095729852] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:12:32,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942993083] [2024-01-27 15:12:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:32,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:12:32,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:12:32,172 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 15:12:32,198 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 15:12:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:32,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:12:32,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:12:32,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-01-27 15:12:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:12:32,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:12:32,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942993083] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:12:32,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:12:32,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2024-01-27 15:12:32,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691581797] [2024-01-27 15:12:32,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:32,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:12:32,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:32,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:12:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:12:32,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-27 15:12:32,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 244 transitions, 3367 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:12:32,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:32,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-27 15:12:32,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:32,814 INFO L124 PetriNetUnfolderBase]: 1508/3152 cut-off events. [2024-01-27 15:12:32,814 INFO L125 PetriNetUnfolderBase]: For 28006/28085 co-relation queries the response was YES. [2024-01-27 15:12:32,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17246 conditions, 3152 events. 1508/3152 cut-off events. For 28006/28085 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 20352 event pairs, 147 based on Foata normal form. 26/3161 useless extension candidates. Maximal degree in co-relation 17197. Up to 1105 conditions per place. [2024-01-27 15:12:32,833 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 388 selfloop transitions, 29 changer transitions 0/440 dead transitions. [2024-01-27 15:12:32,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 440 transitions, 7017 flow [2024-01-27 15:12:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:12:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:12:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-01-27 15:12:32,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495495495495496 [2024-01-27 15:12:32,835 INFO L175 Difference]: Start difference. First operand has 125 places, 244 transitions, 3367 flow. Second operand 6 states and 122 transitions. [2024-01-27 15:12:32,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 440 transitions, 7017 flow [2024-01-27 15:12:32,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 440 transitions, 6318 flow, removed 248 selfloop flow, removed 4 redundant places. [2024-01-27 15:12:32,894 INFO L231 Difference]: Finished difference. Result has 128 places, 253 transitions, 3101 flow [2024-01-27 15:12:32,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3101, PETRI_PLACES=128, PETRI_TRANSITIONS=253} [2024-01-27 15:12:32,895 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 95 predicate places. [2024-01-27 15:12:32,896 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 253 transitions, 3101 flow [2024-01-27 15:12:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:12:32,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:32,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:32,920 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 15:12:33,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:12:33,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:33,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash -338172060, now seen corresponding path program 2 times [2024-01-27 15:12:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:33,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874713893] [2024-01-27 15:12:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:33,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:33,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874713893] [2024-01-27 15:12:33,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874713893] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:12:33,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264917824] [2024-01-27 15:12:33,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:12:33,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:12:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:12:33,525 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 15:12:33,551 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 15:12:33,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:12:33,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:12:33,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:12:33,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:12:33,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-01-27 15:12:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:12:33,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:12:33,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2024-01-27 15:12:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:12:33,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264917824] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:12:33,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:12:33,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2024-01-27 15:12:33,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19042945] [2024-01-27 15:12:33,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:12:33,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:12:33,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:33,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:12:33,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:12:33,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-01-27 15:12:33,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 253 transitions, 3101 flow. Second operand has 17 states, 17 states have (on average 10.941176470588236) internal successors, (186), 17 states have internal predecessors, (186), 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 15:12:33,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:33,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-01-27 15:12:33,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:36,508 INFO L124 PetriNetUnfolderBase]: 4715/9354 cut-off events. [2024-01-27 15:12:36,508 INFO L125 PetriNetUnfolderBase]: For 65007/65013 co-relation queries the response was YES. [2024-01-27 15:12:36,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52409 conditions, 9354 events. 4715/9354 cut-off events. For 65007/65013 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 70105 event pairs, 314 based on Foata normal form. 121/9437 useless extension candidates. Maximal degree in co-relation 52358. Up to 1953 conditions per place. [2024-01-27 15:12:36,569 INFO L140 encePairwiseOnDemand]: 17/37 looper letters, 860 selfloop transitions, 844 changer transitions 31/1740 dead transitions. [2024-01-27 15:12:36,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1740 transitions, 23823 flow [2024-01-27 15:12:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-01-27 15:12:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-01-27 15:12:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 927 transitions. [2024-01-27 15:12:36,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319664492078285 [2024-01-27 15:12:36,572 INFO L175 Difference]: Start difference. First operand has 128 places, 253 transitions, 3101 flow. Second operand 58 states and 927 transitions. [2024-01-27 15:12:36,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1740 transitions, 23823 flow [2024-01-27 15:12:36,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 1740 transitions, 23646 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-01-27 15:12:36,780 INFO L231 Difference]: Finished difference. Result has 209 places, 1168 transitions, 17229 flow [2024-01-27 15:12:36,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3084, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=17229, PETRI_PLACES=209, PETRI_TRANSITIONS=1168} [2024-01-27 15:12:36,781 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 176 predicate places. [2024-01-27 15:12:36,781 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 1168 transitions, 17229 flow [2024-01-27 15:12:36,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.941176470588236) internal successors, (186), 17 states have internal predecessors, (186), 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 15:12:36,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:12:36,782 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:12:36,797 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 15:12:36,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:12:36,992 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 15:12:36,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:12:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1460963456, now seen corresponding path program 3 times [2024-01-27 15:12:36,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:12:36,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115367524] [2024-01-27 15:12:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:12:36,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:12:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:12:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:12:37,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:12:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115367524] [2024-01-27 15:12:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115367524] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:12:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212285036] [2024-01-27 15:12:37,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:12:37,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:12:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:12:37,532 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 15:12:37,568 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 15:12:37,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:12:37,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:12:37,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:12:37,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:12:37,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-01-27 15:12:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:12:37,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:12:37,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2024-01-27 15:12:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:12:37,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212285036] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:12:37,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:12:37,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 17 [2024-01-27 15:12:37,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145121070] [2024-01-27 15:12:37,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:12:37,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:12:37,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:12:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:12:37,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:12:37,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-27 15:12:37,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 1168 transitions, 17229 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:12:37,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:12:37,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-27 15:12:37,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:12:38,627 INFO L124 PetriNetUnfolderBase]: 1133/2726 cut-off events. [2024-01-27 15:12:38,628 INFO L125 PetriNetUnfolderBase]: For 44240/44300 co-relation queries the response was YES. [2024-01-27 15:12:38,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18958 conditions, 2726 events. 1133/2726 cut-off events. For 44240/44300 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 18628 event pairs, 96 based on Foata normal form. 226/2915 useless extension candidates. Maximal degree in co-relation 18890. Up to 866 conditions per place. [2024-01-27 15:12:38,669 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 0 selfloop transitions, 0 changer transitions 653/653 dead transitions. [2024-01-27 15:12:38,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 653 transitions, 11029 flow [2024-01-27 15:12:38,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:12:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:12:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-01-27 15:12:38,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495495495495496 [2024-01-27 15:12:38,685 INFO L175 Difference]: Start difference. First operand has 209 places, 1168 transitions, 17229 flow. Second operand 6 states and 122 transitions. [2024-01-27 15:12:38,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 653 transitions, 11029 flow [2024-01-27 15:12:38,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 653 transitions, 9000 flow, removed 426 selfloop flow, removed 23 redundant places. [2024-01-27 15:12:38,868 INFO L231 Difference]: Finished difference. Result has 166 places, 0 transitions, 0 flow [2024-01-27 15:12:38,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6218, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=166, PETRI_TRANSITIONS=0} [2024-01-27 15:12:38,869 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 133 predicate places. [2024-01-27 15:12:38,870 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 0 transitions, 0 flow [2024-01-27 15:12:38,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:12:38,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-27 15:12:38,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-01-27 15:12:38,873 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-27 15:12:38,873 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-01-27 15:12:38,873 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-27 15:12:38,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-27 15:12:39,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:12:39,084 INFO L445 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1] [2024-01-27 15:12:39,091 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-27 15:12:39,091 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-27 15:12:39,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 03:12:39 BasicIcfg [2024-01-27 15:12:39,095 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-27 15:12:39,096 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-01-27 15:12:39,096 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-01-27 15:12:39,096 INFO L274 PluginConnector]: Witness Printer initialized [2024-01-27 15:12:39,096 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:12:21" (3/4) ... [2024-01-27 15:12:39,098 INFO L137 WitnessPrinter]: Generating witness for correct program [2024-01-27 15:12:39,100 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure worker [2024-01-27 15:12:39,105 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 48 nodes and edges [2024-01-27 15:12:39,105 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-01-27 15:12:39,105 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2024-01-27 15:12:39,105 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-01-27 15:12:39,166 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-01-27 15:12:39,167 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-01-27 15:12:39,167 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-01-27 15:12:39,167 INFO L158 Benchmark]: Toolchain (without parser) took 19096.73ms. Allocated memory was 153.1MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 98.2MB in the beginning and 699.4MB in the end (delta: -601.2MB). Peak memory consumption was 415.6MB. Max. memory is 16.1GB. [2024-01-27 15:12:39,167 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 153.1MB. Free memory is still 117.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 15:12:39,168 INFO L158 Benchmark]: CACSL2BoogieTranslator took 361.19ms. Allocated memory is still 153.1MB. Free memory was 97.9MB in the beginning and 77.3MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-01-27 15:12:39,168 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.02ms. Allocated memory is still 153.1MB. Free memory was 77.3MB in the beginning and 74.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:12:39,168 INFO L158 Benchmark]: Boogie Preprocessor took 49.19ms. Allocated memory is still 153.1MB. Free memory was 74.8MB in the beginning and 72.1MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-01-27 15:12:39,168 INFO L158 Benchmark]: RCFGBuilder took 619.32ms. Allocated memory was 153.1MB in the beginning and 203.4MB in the end (delta: 50.3MB). Free memory was 72.1MB in the beginning and 169.9MB in the end (delta: -97.7MB). Peak memory consumption was 44.3MB. Max. memory is 16.1GB. [2024-01-27 15:12:39,169 INFO L158 Benchmark]: TraceAbstraction took 17952.11ms. Allocated memory was 203.4MB in the beginning and 1.2GB in the end (delta: 964.7MB). Free memory was 168.9MB in the beginning and 703.6MB in the end (delta: -534.7MB). Peak memory consumption was 442.6MB. Max. memory is 16.1GB. [2024-01-27 15:12:39,169 INFO L158 Benchmark]: Witness Printer took 71.11ms. Allocated memory is still 1.2GB. Free memory was 703.6MB in the beginning and 699.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-01-27 15:12:39,170 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 153.1MB. Free memory is still 117.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 361.19ms. Allocated memory is still 153.1MB. Free memory was 97.9MB in the beginning and 77.3MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.02ms. Allocated memory is still 153.1MB. Free memory was 77.3MB in the beginning and 74.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.19ms. Allocated memory is still 153.1MB. Free memory was 74.8MB in the beginning and 72.1MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 619.32ms. Allocated memory was 153.1MB in the beginning and 203.4MB in the end (delta: 50.3MB). Free memory was 72.1MB in the beginning and 169.9MB in the end (delta: -97.7MB). Peak memory consumption was 44.3MB. Max. memory is 16.1GB. * TraceAbstraction took 17952.11ms. Allocated memory was 203.4MB in the beginning and 1.2GB in the end (delta: 964.7MB). Free memory was 168.9MB in the beginning and 703.6MB in the end (delta: -534.7MB). Peak memory consumption was 442.6MB. Max. memory is 16.1GB. * Witness Printer took 71.11ms. Allocated memory is still 1.2GB. Free memory was 703.6MB in the beginning and 699.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17.8s, OverallIterations: 16, TraceHistogramMax: 2, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1611 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1568 mSDsluCounter, 389 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 341 mSDsCounter, 141 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5203 IncrementalHoareTripleChecker+Invalid, 5344 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 141 mSolverCounterUnsat, 48 mSDtfsCounter, 5203 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 592 GetRequests, 320 SyntacticMatches, 4 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2383 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17229occurred in iteration=15, InterpolantAutomatonStates: 193, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 459 NumberOfCodeBlocks, 439 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 541 ConstructedInterpolants, 5 QuantifiedInterpolants, 4267 SizeOfPredicates, 70 NumberOfNonLiveVariables, 1139 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 26 InterpolantComputations, 14 PerfectInterpolantSequences, 59/99 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-27 15:12:39,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE