./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:37:55,171 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:37:55,237 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:37:55,241 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:37:55,242 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:37:55,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:37:55,266 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:37:55,266 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:37:55,266 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:37:55,269 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:37:55,270 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:37:55,270 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:37:55,271 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:37:55,272 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:37:55,272 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:37:55,272 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:37:55,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:37:55,273 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:37:55,273 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:37:55,273 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:37:55,274 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:37:55,274 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:37:55,274 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:37:55,274 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:37:55,275 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:37:55,275 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:37:55,275 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:37:55,275 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:37:55,276 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:37:55,276 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:37:55,277 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:37:55,277 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:37:55,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:37:55,277 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:37:55,278 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:37:55,278 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:37:55,278 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:37:55,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:37:55,278 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:37:55,279 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:37:55,279 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:37:55,279 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:37:55,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:37:55,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-01-27 15:37:55,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:37:55,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:37:55,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:37:55,505 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:37:55,506 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:37:55,507 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2024-01-27 15:37:56,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:37:56,804 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:37:56,805 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2024-01-27 15:37:56,812 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa29fc48/59a33dd32f954c2fb419dc5dc0f38493/FLAG04bbc61a6 [2024-01-27 15:37:56,822 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa29fc48/59a33dd32f954c2fb419dc5dc0f38493 [2024-01-27 15:37:56,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:37:56,825 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:37:56,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:37:56,826 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:37:56,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:37:56,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:37:56" (1/1) ... [2024-01-27 15:37:56,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bbfff58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:56, skipping insertion in model container [2024-01-27 15:37:56,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:37:56" (1/1) ... [2024-01-27 15:37:56,853 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:37:57,005 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-01-27 15:37:57,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:37:57,027 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:37:57,043 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-01-27 15:37:57,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:37:57,059 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:37:57,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57 WrapperNode [2024-01-27 15:37:57,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:37:57,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:37:57,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:37:57,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:37:57,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,093 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,126 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 203 [2024-01-27 15:37:57,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:37:57,127 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:37:57,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:37:57,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:37:57,136 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,139 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,177 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 2, 12, 2]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-01-27 15:37:57,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,177 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,183 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,199 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,201 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,202 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,204 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:37:57,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:37:57,213 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:37:57,213 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:37:57,214 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (1/1) ... [2024-01-27 15:37:57,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:37:57,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:37:57,245 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 15:37:57,246 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 15:37:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:37:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:37:57,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:37:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:37:57,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:37:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:37:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:37:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:37:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:37:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:37:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:37:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:37:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:37:57,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:37:57,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:37:57,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:37:57,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:37:57,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:37:57,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:37:57,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:37:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:37:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:37:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:37:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:37:57,290 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 15:37:57,397 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:37:57,399 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:37:57,630 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:37:57,631 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:37:57,869 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:37:57,869 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:37:57,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:37:57 BoogieIcfgContainer [2024-01-27 15:37:57,870 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:37:57,873 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:37:57,873 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:37:57,876 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:37:57,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:37:56" (1/3) ... [2024-01-27 15:37:57,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162b26f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:37:57, skipping insertion in model container [2024-01-27 15:37:57,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:37:57" (2/3) ... [2024-01-27 15:37:57,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162b26f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:37:57, skipping insertion in model container [2024-01-27 15:37:57,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:37:57" (3/3) ... [2024-01-27 15:37:57,879 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-01-27 15:37:57,889 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:37:57,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:37:57,899 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:37:57,899 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:37:57,957 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:37:57,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2024-01-27 15:37:58,023 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-01-27 15:37:58,026 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:37:58,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-01-27 15:37:58,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2024-01-27 15:37:58,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2024-01-27 15:37:58,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:37:58,049 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;@7a9aa8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:37:58,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:37:58,057 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:37:58,057 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2024-01-27 15:37:58,057 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:37:58,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:58,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:58,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:58,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:58,062 INFO L85 PathProgramCache]: Analyzing trace with hash 344802912, now seen corresponding path program 1 times [2024-01-27 15:37:58,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:58,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862897505] [2024-01-27 15:37:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:58,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:37:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:37:58,275 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 15:37:58,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:37:58,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862897505] [2024-01-27 15:37:58,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862897505] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:37:58,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:37:58,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:37:58,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469596672] [2024-01-27 15:37:58,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:37:58,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:37:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:37:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:37:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:37:58,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-27 15:37:58,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:58,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:37:58,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-27 15:37:58,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:37:58,439 INFO L124 PetriNetUnfolderBase]: 101/199 cut-off events. [2024-01-27 15:37:58,439 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-27 15:37:58,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 199 events. 101/199 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 24 based on Foata normal form. 1/197 useless extension candidates. Maximal degree in co-relation 317. Up to 122 conditions per place. [2024-01-27 15:37:58,447 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 29 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2024-01-27 15:37:58,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 159 flow [2024-01-27 15:37:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:37:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:37:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-01-27 15:37:58,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-01-27 15:37:58,459 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 60 flow. Second operand 3 states and 49 transitions. [2024-01-27 15:37:58,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 159 flow [2024-01-27 15:37:58,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 36 transitions, 145 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:37:58,463 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 71 flow [2024-01-27 15:37:58,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2024-01-27 15:37:58,467 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2024-01-27 15:37:58,468 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 71 flow [2024-01-27 15:37:58,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:58,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:58,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:58,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:37:58,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:58,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:58,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1629858922, now seen corresponding path program 1 times [2024-01-27 15:37:58,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:58,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698059577] [2024-01-27 15:37:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:58,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:37:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:37:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:37:58,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:37:58,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698059577] [2024-01-27 15:37:58,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698059577] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:37:58,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:37:58,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:37:58,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035550459] [2024-01-27 15:37:58,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:37:58,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:37:58,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:37:58,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:37:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:37:58,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:37:58,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:58,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:37:58,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:37:58,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:37:58,803 INFO L124 PetriNetUnfolderBase]: 195/348 cut-off events. [2024-01-27 15:37:58,803 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-01-27 15:37:58,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 348 events. 195/348 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1373 event pairs, 66 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 210. Up to 201 conditions per place. [2024-01-27 15:37:58,808 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 40 selfloop transitions, 9 changer transitions 1/52 dead transitions. [2024-01-27 15:37:58,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 52 transitions, 244 flow [2024-01-27 15:37:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:37:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:37:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-01-27 15:37:58,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-01-27 15:37:58,811 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 71 flow. Second operand 5 states and 66 transitions. [2024-01-27 15:37:58,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 52 transitions, 244 flow [2024-01-27 15:37:58,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 52 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:37:58,816 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 126 flow [2024-01-27 15:37:58,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2024-01-27 15:37:58,817 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2024-01-27 15:37:58,818 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 126 flow [2024-01-27 15:37:58,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:58,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:58,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:58,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:37:58,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:58,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:58,821 INFO L85 PathProgramCache]: Analyzing trace with hash -854956140, now seen corresponding path program 2 times [2024-01-27 15:37:58,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:58,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842626380] [2024-01-27 15:37:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:37:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:37:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:37:58,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:37:58,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842626380] [2024-01-27 15:37:58,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842626380] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:37:58,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:37:58,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:37:58,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442386291] [2024-01-27 15:37:58,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:37:58,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:37:58,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:37:58,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:37:58,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:37:58,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:37:58,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 126 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 15:37:58,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:37:58,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:37:58,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:37:59,156 INFO L124 PetriNetUnfolderBase]: 242/451 cut-off events. [2024-01-27 15:37:59,157 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2024-01-27 15:37:59,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 451 events. 242/451 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1976 event pairs, 27 based on Foata normal form. 14/463 useless extension candidates. Maximal degree in co-relation 599. Up to 130 conditions per place. [2024-01-27 15:37:59,159 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 65 selfloop transitions, 12 changer transitions 1/80 dead transitions. [2024-01-27 15:37:59,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 80 transitions, 449 flow [2024-01-27 15:37:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:37:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:37:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-01-27 15:37:59,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-01-27 15:37:59,162 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 126 flow. Second operand 7 states and 95 transitions. [2024-01-27 15:37:59,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 80 transitions, 449 flow [2024-01-27 15:37:59,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:37:59,165 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 214 flow [2024-01-27 15:37:59,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2024-01-27 15:37:59,166 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2024-01-27 15:37:59,166 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 214 flow [2024-01-27 15:37:59,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 15:37:59,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:59,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:59,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:37:59,167 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:59,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:59,168 INFO L85 PathProgramCache]: Analyzing trace with hash 449448984, now seen corresponding path program 3 times [2024-01-27 15:37:59,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:59,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487009426] [2024-01-27 15:37:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:59,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:37:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:37:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:37:59,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:37:59,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487009426] [2024-01-27 15:37:59,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487009426] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:37:59,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:37:59,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:37:59,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586310183] [2024-01-27 15:37:59,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:37:59,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:37:59,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:37:59,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:37:59,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:37:59,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:37:59,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:59,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:37:59,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:37:59,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:37:59,391 INFO L124 PetriNetUnfolderBase]: 308/569 cut-off events. [2024-01-27 15:37:59,392 INFO L125 PetriNetUnfolderBase]: For 894/894 co-relation queries the response was YES. [2024-01-27 15:37:59,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 569 events. 308/569 cut-off events. For 894/894 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2569 event pairs, 97 based on Foata normal form. 2/565 useless extension candidates. Maximal degree in co-relation 1429. Up to 279 conditions per place. [2024-01-27 15:37:59,395 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 55 selfloop transitions, 10 changer transitions 4/71 dead transitions. [2024-01-27 15:37:59,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 509 flow [2024-01-27 15:37:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:37:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:37:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-01-27 15:37:59,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-01-27 15:37:59,397 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 214 flow. Second operand 5 states and 66 transitions. [2024-01-27 15:37:59,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 509 flow [2024-01-27 15:37:59,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 497 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:37:59,402 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 261 flow [2024-01-27 15:37:59,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-01-27 15:37:59,402 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2024-01-27 15:37:59,403 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 261 flow [2024-01-27 15:37:59,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:59,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:59,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:59,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:37:59,403 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:59,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:59,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1882494625, now seen corresponding path program 1 times [2024-01-27 15:37:59,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:59,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35091413] [2024-01-27 15:37:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:59,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:37:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:37:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:37:59,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:37:59,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35091413] [2024-01-27 15:37:59,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35091413] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:37:59,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:37:59,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:37:59,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002334595] [2024-01-27 15:37:59,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:37:59,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:37:59,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:37:59,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:37:59,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:37:59,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:37:59,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:59,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:37:59,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:37:59,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:37:59,567 INFO L124 PetriNetUnfolderBase]: 327/597 cut-off events. [2024-01-27 15:37:59,567 INFO L125 PetriNetUnfolderBase]: For 1330/1334 co-relation queries the response was YES. [2024-01-27 15:37:59,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2174 conditions, 597 events. 327/597 cut-off events. For 1330/1334 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2708 event pairs, 116 based on Foata normal form. 4/595 useless extension candidates. Maximal degree in co-relation 1918. Up to 314 conditions per place. [2024-01-27 15:37:59,571 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 54 selfloop transitions, 7 changer transitions 8/72 dead transitions. [2024-01-27 15:37:59,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 545 flow [2024-01-27 15:37:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:37:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:37:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-01-27 15:37:59,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-01-27 15:37:59,572 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 261 flow. Second operand 5 states and 70 transitions. [2024-01-27 15:37:59,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 545 flow [2024-01-27 15:37:59,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 506 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-01-27 15:37:59,575 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 263 flow [2024-01-27 15:37:59,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-01-27 15:37:59,576 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2024-01-27 15:37:59,576 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 263 flow [2024-01-27 15:37:59,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:59,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:59,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:59,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:37:59,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:59,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash 763445254, now seen corresponding path program 4 times [2024-01-27 15:37:59,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:59,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828055823] [2024-01-27 15:37:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:37:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:37:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:37:59,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:37:59,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828055823] [2024-01-27 15:37:59,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828055823] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:37:59,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:37:59,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:37:59,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644859855] [2024-01-27 15:37:59,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:37:59,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:37:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:37:59,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:37:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:37:59,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:37:59,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:59,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:37:59,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:37:59,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:37:59,747 INFO L124 PetriNetUnfolderBase]: 400/705 cut-off events. [2024-01-27 15:37:59,748 INFO L125 PetriNetUnfolderBase]: For 1808/1808 co-relation queries the response was YES. [2024-01-27 15:37:59,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528 conditions, 705 events. 400/705 cut-off events. For 1808/1808 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3022 event pairs, 126 based on Foata normal form. 18/721 useless extension candidates. Maximal degree in co-relation 1845. Up to 395 conditions per place. [2024-01-27 15:37:59,752 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 62 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-01-27 15:37:59,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 82 transitions, 650 flow [2024-01-27 15:37:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:37:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:37:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-01-27 15:37:59,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-01-27 15:37:59,773 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 263 flow. Second operand 6 states and 77 transitions. [2024-01-27 15:37:59,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 82 transitions, 650 flow [2024-01-27 15:37:59,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 612 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-01-27 15:37:59,777 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 384 flow [2024-01-27 15:37:59,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=384, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-01-27 15:37:59,777 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 29 predicate places. [2024-01-27 15:37:59,778 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 384 flow [2024-01-27 15:37:59,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:59,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:59,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:59,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:37:59,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:59,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:59,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1008840197, now seen corresponding path program 2 times [2024-01-27 15:37:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:59,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825456920] [2024-01-27 15:37:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:59,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:37:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:37:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:37:59,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:37:59,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825456920] [2024-01-27 15:37:59,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825456920] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:37:59,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:37:59,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:37:59,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943142890] [2024-01-27 15:37:59,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:37:59,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:37:59,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:37:59,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:37:59,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:37:59,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:37:59,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 15:37:59,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:37:59,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:37:59,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:37:59,985 INFO L124 PetriNetUnfolderBase]: 377/689 cut-off events. [2024-01-27 15:37:59,985 INFO L125 PetriNetUnfolderBase]: For 2020/2032 co-relation queries the response was YES. [2024-01-27 15:37:59,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2667 conditions, 689 events. 377/689 cut-off events. For 2020/2032 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3245 event pairs, 32 based on Foata normal form. 8/690 useless extension candidates. Maximal degree in co-relation 1776. Up to 228 conditions per place. [2024-01-27 15:37:59,990 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 71 selfloop transitions, 20 changer transitions 1/96 dead transitions. [2024-01-27 15:37:59,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 96 transitions, 800 flow [2024-01-27 15:37:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:37:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:37:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-01-27 15:37:59,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:37:59,991 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 384 flow. Second operand 7 states and 90 transitions. [2024-01-27 15:37:59,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 96 transitions, 800 flow [2024-01-27 15:37:59,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 769 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-01-27 15:37:59,995 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 477 flow [2024-01-27 15:37:59,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-01-27 15:37:59,996 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2024-01-27 15:37:59,996 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 477 flow [2024-01-27 15:37:59,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 15:37:59,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:59,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:59,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:37:59,996 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:59,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:59,997 INFO L85 PathProgramCache]: Analyzing trace with hash 554147766, now seen corresponding path program 5 times [2024-01-27 15:37:59,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:59,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474411883] [2024-01-27 15:37:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:59,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:00,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:00,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474411883] [2024-01-27 15:38:00,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474411883] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:00,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:00,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:38:00,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931584956] [2024-01-27 15:38:00,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:00,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:38:00,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:00,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:38:00,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:38:00,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:00,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 477 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:00,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:00,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:00,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:00,197 INFO L124 PetriNetUnfolderBase]: 444/781 cut-off events. [2024-01-27 15:38:00,198 INFO L125 PetriNetUnfolderBase]: For 3084/3084 co-relation queries the response was YES. [2024-01-27 15:38:00,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3319 conditions, 781 events. 444/781 cut-off events. For 3084/3084 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3434 event pairs, 189 based on Foata normal form. 8/787 useless extension candidates. Maximal degree in co-relation 2719. Up to 494 conditions per place. [2024-01-27 15:38:00,203 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 55 selfloop transitions, 20 changer transitions 1/77 dead transitions. [2024-01-27 15:38:00,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 77 transitions, 733 flow [2024-01-27 15:38:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-01-27 15:38:00,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-01-27 15:38:00,204 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 477 flow. Second operand 5 states and 66 transitions. [2024-01-27 15:38:00,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 77 transitions, 733 flow [2024-01-27 15:38:00,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 714 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:38:00,209 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 512 flow [2024-01-27 15:38:00,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2024-01-27 15:38:00,210 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2024-01-27 15:38:00,210 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 512 flow [2024-01-27 15:38:00,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:00,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:00,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:00,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:38:00,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:00,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:00,211 INFO L85 PathProgramCache]: Analyzing trace with hash 357640129, now seen corresponding path program 3 times [2024-01-27 15:38:00,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:00,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002615114] [2024-01-27 15:38:00,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:00,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:00,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:00,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002615114] [2024-01-27 15:38:00,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002615114] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:00,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:00,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:00,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366516155] [2024-01-27 15:38:00,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:00,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:38:00,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:38:00,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:38:00,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:00,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 512 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:00,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:00,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:00,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:00,386 INFO L124 PetriNetUnfolderBase]: 455/798 cut-off events. [2024-01-27 15:38:00,386 INFO L125 PetriNetUnfolderBase]: For 3581/3581 co-relation queries the response was YES. [2024-01-27 15:38:00,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3468 conditions, 798 events. 455/798 cut-off events. For 3581/3581 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3526 event pairs, 175 based on Foata normal form. 8/804 useless extension candidates. Maximal degree in co-relation 2941. Up to 494 conditions per place. [2024-01-27 15:38:00,391 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 64 selfloop transitions, 22 changer transitions 0/87 dead transitions. [2024-01-27 15:38:00,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 839 flow [2024-01-27 15:38:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:38:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:38:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-01-27 15:38:00,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-01-27 15:38:00,393 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 512 flow. Second operand 6 states and 74 transitions. [2024-01-27 15:38:00,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 839 flow [2024-01-27 15:38:00,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 87 transitions, 793 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-01-27 15:38:00,398 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 552 flow [2024-01-27 15:38:00,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=552, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-01-27 15:38:00,399 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 44 predicate places. [2024-01-27 15:38:00,399 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 552 flow [2024-01-27 15:38:00,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:00,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:00,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:00,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:38:00,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:00,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1419093412, now seen corresponding path program 6 times [2024-01-27 15:38:00,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:00,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419893893] [2024-01-27 15:38:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:00,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:00,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:00,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419893893] [2024-01-27 15:38:00,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419893893] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:00,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:00,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:00,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629188253] [2024-01-27 15:38:00,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:00,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:38:00,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:00,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:38:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:38:00,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:00,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:00,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:00,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:00,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:00,633 INFO L124 PetriNetUnfolderBase]: 501/884 cut-off events. [2024-01-27 15:38:00,633 INFO L125 PetriNetUnfolderBase]: For 3796/3796 co-relation queries the response was YES. [2024-01-27 15:38:00,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3785 conditions, 884 events. 501/884 cut-off events. For 3796/3796 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4087 event pairs, 157 based on Foata normal form. 10/892 useless extension candidates. Maximal degree in co-relation 3081. Up to 470 conditions per place. [2024-01-27 15:38:00,638 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 64 selfloop transitions, 23 changer transitions 1/89 dead transitions. [2024-01-27 15:38:00,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 89 transitions, 877 flow [2024-01-27 15:38:00,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:38:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:38:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-01-27 15:38:00,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-01-27 15:38:00,640 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 552 flow. Second operand 6 states and 77 transitions. [2024-01-27 15:38:00,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 89 transitions, 877 flow [2024-01-27 15:38:00,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 837 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:38:00,649 INFO L231 Difference]: Finished difference. Result has 74 places, 60 transitions, 576 flow [2024-01-27 15:38:00,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=576, PETRI_PLACES=74, PETRI_TRANSITIONS=60} [2024-01-27 15:38:00,650 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 47 predicate places. [2024-01-27 15:38:00,650 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 60 transitions, 576 flow [2024-01-27 15:38:00,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:00,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:00,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:00,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 15:38:00,651 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:00,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:00,651 INFO L85 PathProgramCache]: Analyzing trace with hash 792013491, now seen corresponding path program 4 times [2024-01-27 15:38:00,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:00,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753469278] [2024-01-27 15:38:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:00,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:00,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:00,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753469278] [2024-01-27 15:38:00,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753469278] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:00,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:00,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:38:00,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022533885] [2024-01-27 15:38:00,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:00,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:38:00,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:38:00,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:38:00,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:38:00,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 60 transitions, 576 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:00,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:00,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:38:00,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:00,829 INFO L124 PetriNetUnfolderBase]: 410/762 cut-off events. [2024-01-27 15:38:00,830 INFO L125 PetriNetUnfolderBase]: For 3281/3289 co-relation queries the response was YES. [2024-01-27 15:38:00,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3234 conditions, 762 events. 410/762 cut-off events. For 3281/3289 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3794 event pairs, 141 based on Foata normal form. 4/753 useless extension candidates. Maximal degree in co-relation 2583. Up to 484 conditions per place. [2024-01-27 15:38:00,834 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 52 selfloop transitions, 17 changer transitions 4/79 dead transitions. [2024-01-27 15:38:00,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 799 flow [2024-01-27 15:38:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-01-27 15:38:00,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-01-27 15:38:00,835 INFO L175 Difference]: Start difference. First operand has 74 places, 60 transitions, 576 flow. Second operand 5 states and 64 transitions. [2024-01-27 15:38:00,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 799 flow [2024-01-27 15:38:00,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 741 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-01-27 15:38:00,842 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 542 flow [2024-01-27 15:38:00,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=542, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2024-01-27 15:38:00,842 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2024-01-27 15:38:00,843 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 542 flow [2024-01-27 15:38:00,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:00,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:00,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:00,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-27 15:38:00,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:00,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1232387926, now seen corresponding path program 7 times [2024-01-27 15:38:00,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:00,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863363248] [2024-01-27 15:38:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:00,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:00,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:00,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863363248] [2024-01-27 15:38:00,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863363248] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:00,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:00,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:38:00,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741736103] [2024-01-27 15:38:00,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:00,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:38:00,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:00,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:38:00,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:38:00,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:38:00,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 542 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:00,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:00,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:38:00,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:01,016 INFO L124 PetriNetUnfolderBase]: 401/744 cut-off events. [2024-01-27 15:38:01,016 INFO L125 PetriNetUnfolderBase]: For 3318/3322 co-relation queries the response was YES. [2024-01-27 15:38:01,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3138 conditions, 744 events. 401/744 cut-off events. For 3318/3322 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3599 event pairs, 120 based on Foata normal form. 2/740 useless extension candidates. Maximal degree in co-relation 2480. Up to 379 conditions per place. [2024-01-27 15:38:01,020 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 50 selfloop transitions, 17 changer transitions 3/77 dead transitions. [2024-01-27 15:38:01,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 772 flow [2024-01-27 15:38:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-01-27 15:38:01,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-01-27 15:38:01,021 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 542 flow. Second operand 5 states and 63 transitions. [2024-01-27 15:38:01,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 772 flow [2024-01-27 15:38:01,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 734 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-27 15:38:01,026 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 535 flow [2024-01-27 15:38:01,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-01-27 15:38:01,026 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2024-01-27 15:38:01,026 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 535 flow [2024-01-27 15:38:01,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:01,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:01,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:01,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:38:01,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:01,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash -388448233, now seen corresponding path program 5 times [2024-01-27 15:38:01,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:01,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307707063] [2024-01-27 15:38:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:01,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:01,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307707063] [2024-01-27 15:38:01,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307707063] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:01,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:01,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:01,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611204631] [2024-01-27 15:38:01,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:01,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:38:01,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:01,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:38:01,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:38:01,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:01,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 535 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:01,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:01,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:01,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:01,222 INFO L124 PetriNetUnfolderBase]: 524/913 cut-off events. [2024-01-27 15:38:01,222 INFO L125 PetriNetUnfolderBase]: For 3979/3979 co-relation queries the response was YES. [2024-01-27 15:38:01,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3811 conditions, 913 events. 524/913 cut-off events. For 3979/3979 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4153 event pairs, 158 based on Foata normal form. 8/919 useless extension candidates. Maximal degree in co-relation 3109. Up to 416 conditions per place. [2024-01-27 15:38:01,227 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 63 selfloop transitions, 23 changer transitions 1/88 dead transitions. [2024-01-27 15:38:01,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 880 flow [2024-01-27 15:38:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:38:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:38:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-01-27 15:38:01,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-01-27 15:38:01,229 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 535 flow. Second operand 6 states and 74 transitions. [2024-01-27 15:38:01,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 880 flow [2024-01-27 15:38:01,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 832 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-01-27 15:38:01,235 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 586 flow [2024-01-27 15:38:01,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=586, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-01-27 15:38:01,236 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 47 predicate places. [2024-01-27 15:38:01,247 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 586 flow [2024-01-27 15:38:01,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:01,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:01,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:01,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 15:38:01,248 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:01,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:01,249 INFO L85 PathProgramCache]: Analyzing trace with hash -107704447, now seen corresponding path program 6 times [2024-01-27 15:38:01,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:01,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203352049] [2024-01-27 15:38:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:01,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:01,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:01,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203352049] [2024-01-27 15:38:01,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203352049] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:01,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:01,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:38:01,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178031921] [2024-01-27 15:38:01,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:01,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:38:01,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:01,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:38:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:38:01,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-27 15:38:01,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 586 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:01,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:01,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-27 15:38:01,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:01,455 INFO L124 PetriNetUnfolderBase]: 410/740 cut-off events. [2024-01-27 15:38:01,456 INFO L125 PetriNetUnfolderBase]: For 3528/3529 co-relation queries the response was YES. [2024-01-27 15:38:01,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3110 conditions, 740 events. 410/740 cut-off events. For 3528/3529 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3463 event pairs, 139 based on Foata normal form. 4/737 useless extension candidates. Maximal degree in co-relation 2388. Up to 385 conditions per place. [2024-01-27 15:38:01,461 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 50 selfloop transitions, 17 changer transitions 4/78 dead transitions. [2024-01-27 15:38:01,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 789 flow [2024-01-27 15:38:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-01-27 15:38:01,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-01-27 15:38:01,462 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 586 flow. Second operand 5 states and 63 transitions. [2024-01-27 15:38:01,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 789 flow [2024-01-27 15:38:01,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 748 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-27 15:38:01,468 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 566 flow [2024-01-27 15:38:01,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=566, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2024-01-27 15:38:01,469 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2024-01-27 15:38:01,469 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 566 flow [2024-01-27 15:38:01,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:01,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:01,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:01,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-27 15:38:01,470 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:01,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:01,471 INFO L85 PathProgramCache]: Analyzing trace with hash -345317257, now seen corresponding path program 1 times [2024-01-27 15:38:01,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:01,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010873710] [2024-01-27 15:38:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:01,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:38:01,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:01,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010873710] [2024-01-27 15:38:01,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010873710] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:01,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:38:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093567998] [2024-01-27 15:38:01,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:01,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:38:01,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:38:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:38:01,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-27 15:38:01,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 566 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 15:38:01,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:01,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-27 15:38:01,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:01,698 INFO L124 PetriNetUnfolderBase]: 340/688 cut-off events. [2024-01-27 15:38:01,698 INFO L125 PetriNetUnfolderBase]: For 3555/3564 co-relation queries the response was YES. [2024-01-27 15:38:01,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 688 events. 340/688 cut-off events. For 3555/3564 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3505 event pairs, 170 based on Foata normal form. 25/704 useless extension candidates. Maximal degree in co-relation 2289. Up to 546 conditions per place. [2024-01-27 15:38:01,703 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 46 selfloop transitions, 2 changer transitions 15/76 dead transitions. [2024-01-27 15:38:01,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 809 flow [2024-01-27 15:38:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:38:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:38:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-01-27 15:38:01,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:38:01,705 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 566 flow. Second operand 5 states and 60 transitions. [2024-01-27 15:38:01,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 809 flow [2024-01-27 15:38:01,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 763 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-27 15:38:01,710 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 550 flow [2024-01-27 15:38:01,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=550, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-01-27 15:38:01,712 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2024-01-27 15:38:01,712 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 550 flow [2024-01-27 15:38:01,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 15:38:01,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:01,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:01,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-27 15:38:01,713 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:01,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1787390974, now seen corresponding path program 1 times [2024-01-27 15:38:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:01,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771023217] [2024-01-27 15:38:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:01,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:38:01,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:01,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771023217] [2024-01-27 15:38:01,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771023217] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:01,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:01,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:38:01,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127757902] [2024-01-27 15:38:01,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:01,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:38:01,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:38:01,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:38:01,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-27 15:38:01,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 550 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 15:38:01,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:01,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-27 15:38:01,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:01,905 INFO L124 PetriNetUnfolderBase]: 338/683 cut-off events. [2024-01-27 15:38:01,905 INFO L125 PetriNetUnfolderBase]: For 3072/3091 co-relation queries the response was YES. [2024-01-27 15:38:01,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 683 events. 338/683 cut-off events. For 3072/3091 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3494 event pairs, 170 based on Foata normal form. 25/701 useless extension candidates. Maximal degree in co-relation 2781. Up to 547 conditions per place. [2024-01-27 15:38:01,909 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 47 selfloop transitions, 2 changer transitions 11/73 dead transitions. [2024-01-27 15:38:01,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 73 transitions, 773 flow [2024-01-27 15:38:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:38:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:38:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2024-01-27 15:38:01,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-01-27 15:38:01,911 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 550 flow. Second operand 4 states and 51 transitions. [2024-01-27 15:38:01,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 73 transitions, 773 flow [2024-01-27 15:38:01,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 757 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-01-27 15:38:01,916 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 554 flow [2024-01-27 15:38:01,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2024-01-27 15:38:01,917 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2024-01-27 15:38:01,917 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 554 flow [2024-01-27 15:38:01,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 15:38:01,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:01,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:01,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-27 15:38:01,918 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:01,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash 15225383, now seen corresponding path program 1 times [2024-01-27 15:38:01,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:01,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895021291] [2024-01-27 15:38:01,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:01,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:38:02,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:02,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895021291] [2024-01-27 15:38:02,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895021291] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:02,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701378183] [2024-01-27 15:38:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:02,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:02,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:02,103 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 15:38:02,109 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 15:38:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:02,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:38:02,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:38:02,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:02,320 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 36 treesize of output 12 [2024-01-27 15:38:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:38:02,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701378183] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:02,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:02,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-01-27 15:38:02,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920847620] [2024-01-27 15:38:02,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:02,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:38:02,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:02,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:38:02,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:38:02,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-27 15:38:02,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 554 flow. Second operand has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:02,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:02,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-27 15:38:02,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:02,641 INFO L124 PetriNetUnfolderBase]: 1017/1955 cut-off events. [2024-01-27 15:38:02,642 INFO L125 PetriNetUnfolderBase]: For 7882/7933 co-relation queries the response was YES. [2024-01-27 15:38:02,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7656 conditions, 1955 events. 1017/1955 cut-off events. For 7882/7933 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12005 event pairs, 149 based on Foata normal form. 18/1966 useless extension candidates. Maximal degree in co-relation 5625. Up to 526 conditions per place. [2024-01-27 15:38:02,654 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 158 selfloop transitions, 14 changer transitions 5/190 dead transitions. [2024-01-27 15:38:02,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 190 transitions, 2022 flow [2024-01-27 15:38:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:38:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:38:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-01-27 15:38:02,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349794238683128 [2024-01-27 15:38:02,656 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 554 flow. Second operand 9 states and 130 transitions. [2024-01-27 15:38:02,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 190 transitions, 2022 flow [2024-01-27 15:38:02,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 190 transitions, 2006 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-27 15:38:02,666 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 663 flow [2024-01-27 15:38:02,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=663, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2024-01-27 15:38:02,667 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2024-01-27 15:38:02,667 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 663 flow [2024-01-27 15:38:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:02,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:02,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:02,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:02,883 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,SelfDestructingSolverStorable16 [2024-01-27 15:38:02,883 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:02,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash -354859999, now seen corresponding path program 2 times [2024-01-27 15:38:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:02,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572933552] [2024-01-27 15:38:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:02,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:38:03,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:03,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572933552] [2024-01-27 15:38:03,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572933552] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:03,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208452692] [2024-01-27 15:38:03,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:38:03,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:03,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:03,035 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 15:38:03,068 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 15:38:03,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:38:03,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:03,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:38:03,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:38:03,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:03,214 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 36 treesize of output 12 [2024-01-27 15:38:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:38:03,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208452692] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:03,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:03,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-01-27 15:38:03,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030729762] [2024-01-27 15:38:03,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:03,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:38:03,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:38:03,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:38:03,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-27 15:38:03,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 663 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 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 15:38:03,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:03,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-27 15:38:03,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:03,831 INFO L124 PetriNetUnfolderBase]: 2525/4865 cut-off events. [2024-01-27 15:38:03,832 INFO L125 PetriNetUnfolderBase]: For 21543/21629 co-relation queries the response was YES. [2024-01-27 15:38:03,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20115 conditions, 4865 events. 2525/4865 cut-off events. For 21543/21629 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 35792 event pairs, 483 based on Foata normal form. 63/4914 useless extension candidates. Maximal degree in co-relation 14663. Up to 1603 conditions per place. [2024-01-27 15:38:03,861 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 165 selfloop transitions, 23 changer transitions 10/211 dead transitions. [2024-01-27 15:38:03,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 211 transitions, 2278 flow [2024-01-27 15:38:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:38:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:38:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-01-27 15:38:03,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5509259259259259 [2024-01-27 15:38:03,862 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 663 flow. Second operand 8 states and 119 transitions. [2024-01-27 15:38:03,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 211 transitions, 2278 flow [2024-01-27 15:38:03,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 211 transitions, 2230 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-01-27 15:38:03,891 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 851 flow [2024-01-27 15:38:03,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=851, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2024-01-27 15:38:03,891 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 69 predicate places. [2024-01-27 15:38:03,891 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 851 flow [2024-01-27 15:38:03,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 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 15:38:03,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:03,892 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, 1, 1] [2024-01-27 15:38:03,916 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 15:38:04,117 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,SelfDestructingSolverStorable17 [2024-01-27 15:38:04,118 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:04,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1670425868, now seen corresponding path program 3 times [2024-01-27 15:38:04,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:04,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369208617] [2024-01-27 15:38:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:04,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:04,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:04,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369208617] [2024-01-27 15:38:04,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369208617] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:04,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395977659] [2024-01-27 15:38:04,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:38:04,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:04,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:04,224 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 15:38:04,226 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 15:38:04,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:38:04,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:04,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:38:04,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:04,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:04,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395977659] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:04,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:04,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:38:04,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064131964] [2024-01-27 15:38:04,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:04,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:38:04,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:38:04,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:38:04,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:04,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 851 flow. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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 15:38:04,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:04,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:04,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:05,829 INFO L124 PetriNetUnfolderBase]: 5060/8499 cut-off events. [2024-01-27 15:38:05,830 INFO L125 PetriNetUnfolderBase]: For 31142/31142 co-relation queries the response was YES. [2024-01-27 15:38:05,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34778 conditions, 8499 events. 5060/8499 cut-off events. For 31142/31142 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 55968 event pairs, 260 based on Foata normal form. 260/8759 useless extension candidates. Maximal degree in co-relation 28646. Up to 1535 conditions per place. [2024-01-27 15:38:05,887 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 356 selfloop transitions, 102 changer transitions 8/467 dead transitions. [2024-01-27 15:38:05,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 467 transitions, 4396 flow [2024-01-27 15:38:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:38:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:38:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 294 transitions. [2024-01-27 15:38:05,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37547892720306514 [2024-01-27 15:38:05,893 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 851 flow. Second operand 29 states and 294 transitions. [2024-01-27 15:38:05,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 467 transitions, 4396 flow [2024-01-27 15:38:05,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 467 transitions, 4345 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-01-27 15:38:05,982 INFO L231 Difference]: Finished difference. Result has 143 places, 164 transitions, 1776 flow [2024-01-27 15:38:05,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1776, PETRI_PLACES=143, PETRI_TRANSITIONS=164} [2024-01-27 15:38:05,982 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 116 predicate places. [2024-01-27 15:38:05,982 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 164 transitions, 1776 flow [2024-01-27 15:38:05,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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 15:38:05,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:05,983 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, 1, 1] [2024-01-27 15:38:05,997 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 15:38:06,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:06,196 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:06,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:06,196 INFO L85 PathProgramCache]: Analyzing trace with hash 62821814, now seen corresponding path program 4 times [2024-01-27 15:38:06,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:06,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743371322] [2024-01-27 15:38:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:06,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:06,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743371322] [2024-01-27 15:38:06,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743371322] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:06,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836537686] [2024-01-27 15:38:06,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:38:06,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:06,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:06,284 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 15:38:06,332 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 15:38:06,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:38:06,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:06,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:38:06,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:06,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:06,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836537686] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:06,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:06,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-27 15:38:06,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311542604] [2024-01-27 15:38:06,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:06,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:38:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:38:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:38:06,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:06,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 164 transitions, 1776 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 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 15:38:06,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:06,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:06,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:08,575 INFO L124 PetriNetUnfolderBase]: 7387/12114 cut-off events. [2024-01-27 15:38:08,575 INFO L125 PetriNetUnfolderBase]: For 129783/129783 co-relation queries the response was YES. [2024-01-27 15:38:08,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69531 conditions, 12114 events. 7387/12114 cut-off events. For 129783/129783 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 79546 event pairs, 346 based on Foata normal form. 124/12238 useless extension candidates. Maximal degree in co-relation 61249. Up to 2195 conditions per place. [2024-01-27 15:38:08,692 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 362 selfloop transitions, 155 changer transitions 4/522 dead transitions. [2024-01-27 15:38:08,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 522 transitions, 5868 flow [2024-01-27 15:38:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:38:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:38:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 259 transitions. [2024-01-27 15:38:08,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36894586894586895 [2024-01-27 15:38:08,694 INFO L175 Difference]: Start difference. First operand has 143 places, 164 transitions, 1776 flow. Second operand 26 states and 259 transitions. [2024-01-27 15:38:08,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 522 transitions, 5868 flow [2024-01-27 15:38:09,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 522 transitions, 5686 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-01-27 15:38:09,265 INFO L231 Difference]: Finished difference. Result has 173 places, 227 transitions, 2770 flow [2024-01-27 15:38:09,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2770, PETRI_PLACES=173, PETRI_TRANSITIONS=227} [2024-01-27 15:38:09,265 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 146 predicate places. [2024-01-27 15:38:09,266 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 227 transitions, 2770 flow [2024-01-27 15:38:09,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 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 15:38:09,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:09,267 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, 1, 1] [2024-01-27 15:38:09,287 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 15:38:09,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:09,468 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:09,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash -257296894, now seen corresponding path program 5 times [2024-01-27 15:38:09,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:09,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665424560] [2024-01-27 15:38:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:09,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:09,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665424560] [2024-01-27 15:38:09,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665424560] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:09,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484172378] [2024-01-27 15:38:09,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:38:09,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:09,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:09,617 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 15:38:09,654 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 15:38:09,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:38:09,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:09,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:38:09,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:09,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:09,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484172378] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:09,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:09,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:38:09,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548626267] [2024-01-27 15:38:09,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:09,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:38:09,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:09,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:38:09,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:38:09,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:09,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 227 transitions, 2770 flow. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 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 15:38:09,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:09,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:09,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:11,921 INFO L124 PetriNetUnfolderBase]: 8381/13728 cut-off events. [2024-01-27 15:38:11,921 INFO L125 PetriNetUnfolderBase]: For 197060/197060 co-relation queries the response was YES. [2024-01-27 15:38:12,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89246 conditions, 13728 events. 8381/13728 cut-off events. For 197060/197060 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 91937 event pairs, 922 based on Foata normal form. 66/13794 useless extension candidates. Maximal degree in co-relation 80873. Up to 3472 conditions per place. [2024-01-27 15:38:12,086 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 350 selfloop transitions, 113 changer transitions 17/481 dead transitions. [2024-01-27 15:38:12,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 481 transitions, 6004 flow [2024-01-27 15:38:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:38:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:38:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 175 transitions. [2024-01-27 15:38:12,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812636165577342 [2024-01-27 15:38:12,092 INFO L175 Difference]: Start difference. First operand has 173 places, 227 transitions, 2770 flow. Second operand 17 states and 175 transitions. [2024-01-27 15:38:12,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 481 transitions, 6004 flow [2024-01-27 15:38:13,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 481 transitions, 5491 flow, removed 201 selfloop flow, removed 13 redundant places. [2024-01-27 15:38:13,960 INFO L231 Difference]: Finished difference. Result has 184 places, 246 transitions, 2903 flow [2024-01-27 15:38:13,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2357, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2903, PETRI_PLACES=184, PETRI_TRANSITIONS=246} [2024-01-27 15:38:13,961 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 157 predicate places. [2024-01-27 15:38:13,961 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 246 transitions, 2903 flow [2024-01-27 15:38:13,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 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 15:38:13,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:13,961 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, 1, 1] [2024-01-27 15:38:13,976 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 15:38:14,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:14,175 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:14,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1755051684, now seen corresponding path program 6 times [2024-01-27 15:38:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:14,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820009761] [2024-01-27 15:38:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:14,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:14,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:14,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820009761] [2024-01-27 15:38:14,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820009761] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:14,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875770150] [2024-01-27 15:38:14,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:38:14,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:14,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:14,284 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 15:38:14,286 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 15:38:14,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:38:14,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:14,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:38:14,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:14,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:14,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875770150] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:14,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:14,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-01-27 15:38:14,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564273100] [2024-01-27 15:38:14,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:14,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:38:14,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:14,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:38:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:38:14,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:14,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 246 transitions, 2903 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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 15:38:14,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:14,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:14,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:17,577 INFO L124 PetriNetUnfolderBase]: 10726/17642 cut-off events. [2024-01-27 15:38:17,577 INFO L125 PetriNetUnfolderBase]: For 279625/279625 co-relation queries the response was YES. [2024-01-27 15:38:17,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113417 conditions, 17642 events. 10726/17642 cut-off events. For 279625/279625 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 123934 event pairs, 479 based on Foata normal form. 86/17728 useless extension candidates. Maximal degree in co-relation 108119. Up to 4585 conditions per place. [2024-01-27 15:38:17,753 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 284 selfloop transitions, 238 changer transitions 12/535 dead transitions. [2024-01-27 15:38:17,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 535 transitions, 6729 flow [2024-01-27 15:38:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:38:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:38:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 158 transitions. [2024-01-27 15:38:17,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39012345679012345 [2024-01-27 15:38:17,754 INFO L175 Difference]: Start difference. First operand has 184 places, 246 transitions, 2903 flow. Second operand 15 states and 158 transitions. [2024-01-27 15:38:17,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 535 transitions, 6729 flow [2024-01-27 15:38:19,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 535 transitions, 6457 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-01-27 15:38:19,154 INFO L231 Difference]: Finished difference. Result has 200 places, 352 transitions, 4774 flow [2024-01-27 15:38:19,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4774, PETRI_PLACES=200, PETRI_TRANSITIONS=352} [2024-01-27 15:38:19,154 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 173 predicate places. [2024-01-27 15:38:19,154 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 352 transitions, 4774 flow [2024-01-27 15:38:19,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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 15:38:19,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:19,155 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, 1, 1] [2024-01-27 15:38:19,168 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 15:38:19,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:19,366 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:19,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:19,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1366040326, now seen corresponding path program 7 times [2024-01-27 15:38:19,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:19,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646051505] [2024-01-27 15:38:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:19,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:19,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:19,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646051505] [2024-01-27 15:38:19,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646051505] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:19,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533487555] [2024-01-27 15:38:19,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:38:19,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:19,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:19,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:19,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:38:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:19,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:38:19,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:19,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:19,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533487555] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:19,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:19,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-27 15:38:19,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895412676] [2024-01-27 15:38:19,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:19,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:38:19,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:19,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:38:19,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:38:19,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:19,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 352 transitions, 4774 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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 15:38:19,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:19,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:19,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:23,300 INFO L124 PetriNetUnfolderBase]: 11998/19738 cut-off events. [2024-01-27 15:38:23,301 INFO L125 PetriNetUnfolderBase]: For 381055/381055 co-relation queries the response was YES. [2024-01-27 15:38:23,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136845 conditions, 19738 events. 11998/19738 cut-off events. For 381055/381055 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 141554 event pairs, 525 based on Foata normal form. 124/19862 useless extension candidates. Maximal degree in co-relation 130804. Up to 3288 conditions per place. [2024-01-27 15:38:23,656 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 407 selfloop transitions, 295 changer transitions 5/708 dead transitions. [2024-01-27 15:38:23,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 708 transitions, 9678 flow [2024-01-27 15:38:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:38:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:38:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 264 transitions. [2024-01-27 15:38:23,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37606837606837606 [2024-01-27 15:38:23,665 INFO L175 Difference]: Start difference. First operand has 200 places, 352 transitions, 4774 flow. Second operand 26 states and 264 transitions. [2024-01-27 15:38:23,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 708 transitions, 9678 flow [2024-01-27 15:38:26,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 708 transitions, 9436 flow, removed 121 selfloop flow, removed 0 redundant places. [2024-01-27 15:38:26,545 INFO L231 Difference]: Finished difference. Result has 238 places, 411 transitions, 6557 flow [2024-01-27 15:38:26,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6557, PETRI_PLACES=238, PETRI_TRANSITIONS=411} [2024-01-27 15:38:26,546 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 211 predicate places. [2024-01-27 15:38:26,546 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 411 transitions, 6557 flow [2024-01-27 15:38:26,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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 15:38:26,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:26,546 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, 1, 1] [2024-01-27 15:38:26,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-27 15:38:26,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:26,758 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:26,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1154449682, now seen corresponding path program 8 times [2024-01-27 15:38:26,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:26,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014289433] [2024-01-27 15:38:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:26,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:26,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:26,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014289433] [2024-01-27 15:38:26,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014289433] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:26,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884226764] [2024-01-27 15:38:26,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:38:26,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:26,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:26,848 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:26,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:38:26,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:38:26,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:26,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:38:26,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:27,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:27,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884226764] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:27,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:27,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 15:38:27,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973473271] [2024-01-27 15:38:27,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:38:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:38:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:38:27,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:27,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 411 transitions, 6557 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 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 15:38:27,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:27,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:27,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:31,951 INFO L124 PetriNetUnfolderBase]: 14335/23777 cut-off events. [2024-01-27 15:38:31,951 INFO L125 PetriNetUnfolderBase]: For 568629/568629 co-relation queries the response was YES. [2024-01-27 15:38:32,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175288 conditions, 23777 events. 14335/23777 cut-off events. For 568629/568629 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 177091 event pairs, 689 based on Foata normal form. 112/23889 useless extension candidates. Maximal degree in co-relation 168755. Up to 6873 conditions per place. [2024-01-27 15:38:32,395 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 347 selfloop transitions, 348 changer transitions 6/702 dead transitions. [2024-01-27 15:38:32,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 702 transitions, 11245 flow [2024-01-27 15:38:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:38:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:38:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 169 transitions. [2024-01-27 15:38:32,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912037037037037 [2024-01-27 15:38:32,413 INFO L175 Difference]: Start difference. First operand has 238 places, 411 transitions, 6557 flow. Second operand 16 states and 169 transitions. [2024-01-27 15:38:32,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 702 transitions, 11245 flow [2024-01-27 15:38:38,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 702 transitions, 10864 flow, removed 115 selfloop flow, removed 10 redundant places. [2024-01-27 15:38:38,500 INFO L231 Difference]: Finished difference. Result has 249 places, 506 transitions, 9067 flow [2024-01-27 15:38:38,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6241, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9067, PETRI_PLACES=249, PETRI_TRANSITIONS=506} [2024-01-27 15:38:38,501 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 222 predicate places. [2024-01-27 15:38:38,501 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 506 transitions, 9067 flow [2024-01-27 15:38:38,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 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 15:38:38,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:38,501 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, 1, 1] [2024-01-27 15:38:38,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:38,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-27 15:38:38,713 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:38,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:38,714 INFO L85 PathProgramCache]: Analyzing trace with hash -787515612, now seen corresponding path program 9 times [2024-01-27 15:38:38,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:38,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555978328] [2024-01-27 15:38:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:38,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:38,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:38,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555978328] [2024-01-27 15:38:38,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555978328] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:38,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137236454] [2024-01-27 15:38:38,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:38:38,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:38,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:38,783 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:38,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:38:38,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:38:38,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:38,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:38:38,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:38,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:38,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137236454] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:38,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:38,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-27 15:38:38,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315884658] [2024-01-27 15:38:38,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:38,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:38:38,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:38,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:38:38,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:38:39,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:39,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 506 transitions, 9067 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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 15:38:39,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:39,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:39,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:44,832 INFO L124 PetriNetUnfolderBase]: 14341/23819 cut-off events. [2024-01-27 15:38:44,832 INFO L125 PetriNetUnfolderBase]: For 612380/612380 co-relation queries the response was YES. [2024-01-27 15:38:44,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187502 conditions, 23819 events. 14341/23819 cut-off events. For 612380/612380 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 178927 event pairs, 1950 based on Foata normal form. 34/23853 useless extension candidates. Maximal degree in co-relation 182001. Up to 7453 conditions per place. [2024-01-27 15:38:45,081 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 459 selfloop transitions, 232 changer transitions 8/700 dead transitions. [2024-01-27 15:38:45,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 700 transitions, 12278 flow [2024-01-27 15:38:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:38:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:38:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-01-27 15:38:45,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41595441595441596 [2024-01-27 15:38:45,093 INFO L175 Difference]: Start difference. First operand has 249 places, 506 transitions, 9067 flow. Second operand 13 states and 146 transitions. [2024-01-27 15:38:45,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 700 transitions, 12278 flow [2024-01-27 15:38:53,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 700 transitions, 12101 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-01-27 15:38:53,796 INFO L231 Difference]: Finished difference. Result has 253 places, 503 transitions, 9366 flow [2024-01-27 15:38:53,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8881, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9366, PETRI_PLACES=253, PETRI_TRANSITIONS=503} [2024-01-27 15:38:53,797 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 226 predicate places. [2024-01-27 15:38:53,798 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 503 transitions, 9366 flow [2024-01-27 15:38:53,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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 15:38:53,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:53,798 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, 1, 1] [2024-01-27 15:38:53,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-27 15:38:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-27 15:38:54,008 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:54,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash 379315641, now seen corresponding path program 10 times [2024-01-27 15:38:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:54,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400571507] [2024-01-27 15:38:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:54,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:54,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:54,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400571507] [2024-01-27 15:38:54,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400571507] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:54,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474739967] [2024-01-27 15:38:54,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:38:54,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:54,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:54,164 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:54,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:38:54,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:38:54,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:54,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:38:54,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:54,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:38:54,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474739967] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:54,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:54,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-27 15:38:54,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627812437] [2024-01-27 15:38:54,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:54,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:38:54,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:54,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:38:54,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:38:54,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:38:54,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 503 transitions, 9366 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 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 15:38:54,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:54,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:38:54,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:00,683 INFO L124 PetriNetUnfolderBase]: 15937/26439 cut-off events. [2024-01-27 15:39:00,684 INFO L125 PetriNetUnfolderBase]: For 707383/707383 co-relation queries the response was YES. [2024-01-27 15:39:00,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212014 conditions, 26439 events. 15937/26439 cut-off events. For 707383/707383 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 201883 event pairs, 3033 based on Foata normal form. 416/26855 useless extension candidates. Maximal degree in co-relation 206167. Up to 12752 conditions per place. [2024-01-27 15:39:01,062 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 703 selfloop transitions, 145 changer transitions 5/854 dead transitions. [2024-01-27 15:39:01,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 854 transitions, 15523 flow [2024-01-27 15:39:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:39:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:39:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 209 transitions. [2024-01-27 15:39:01,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387037037037037 [2024-01-27 15:39:01,069 INFO L175 Difference]: Start difference. First operand has 253 places, 503 transitions, 9366 flow. Second operand 20 states and 209 transitions. [2024-01-27 15:39:01,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 854 transitions, 15523 flow [2024-01-27 15:39:10,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 854 transitions, 14999 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-01-27 15:39:10,909 INFO L231 Difference]: Finished difference. Result has 272 places, 550 transitions, 10467 flow [2024-01-27 15:39:10,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8825, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10467, PETRI_PLACES=272, PETRI_TRANSITIONS=550} [2024-01-27 15:39:10,910 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 245 predicate places. [2024-01-27 15:39:10,910 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 550 transitions, 10467 flow [2024-01-27 15:39:10,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 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 15:39:10,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:10,910 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, 1, 1] [2024-01-27 15:39:10,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:11,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:39:11,122 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:11,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:11,123 INFO L85 PathProgramCache]: Analyzing trace with hash 516825142, now seen corresponding path program 11 times [2024-01-27 15:39:11,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:11,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652206130] [2024-01-27 15:39:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:11,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:39:11,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:11,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652206130] [2024-01-27 15:39:11,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652206130] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:11,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646293196] [2024-01-27 15:39:11,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:39:11,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:11,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:11,187 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:11,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:39:11,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:39:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:11,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:39:11,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:39:11,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:39:11,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646293196] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:11,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:11,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-27 15:39:11,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428927640] [2024-01-27 15:39:11,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:11,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:39:11,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:11,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:39:11,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:39:11,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-27 15:39:11,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 550 transitions, 10467 flow. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 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 15:39:11,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:11,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-27 15:39:11,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand