./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.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/chl-array-int-subst.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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:17:01,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:17:01,955 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:17:01,963 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:17:01,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:17:01,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:17:01,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:17:01,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:17:01,993 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:17:01,997 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:17:01,997 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:17:01,997 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:17:01,999 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:17:02,000 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:17:02,000 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:17:02,001 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:17:02,001 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:17:02,001 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:17:02,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:17:02,002 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:17:02,002 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:17:02,003 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:17:02,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:17:02,003 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:17:02,004 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:17:02,004 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:17:02,004 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:17:02,004 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:17:02,005 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:17:02,005 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:17:02,006 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:17:02,007 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:17:02,007 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:17:02,007 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:17:02,007 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:17:02,008 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:17:02,008 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:17:02,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:17:02,008 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:17:02,009 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:17:02,009 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:17:02,009 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:17:02,009 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:17:02,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2024-01-27 15:17:02,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:17:02,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:17:02,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:17:02,288 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:17:02,289 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:17:02,290 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2024-01-27 15:17:03,439 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:17:03,623 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:17:03,623 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2024-01-27 15:17:03,630 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3d75c80d/10de267bbd7b456f995e778c1a59dbee/FLAG3439bbce3 [2024-01-27 15:17:03,643 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3d75c80d/10de267bbd7b456f995e778c1a59dbee [2024-01-27 15:17:03,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:17:03,646 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:17:03,647 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:17:03,647 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:17:03,652 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:17:03,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:03,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c3d3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03, skipping insertion in model container [2024-01-27 15:17:03,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:03,690 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:17:03,901 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/chl-array-int-subst.wvr.c[2820,2833] [2024-01-27 15:17:03,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:17:03,928 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:17:03,969 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/chl-array-int-subst.wvr.c[2820,2833] [2024-01-27 15:17:03,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:17:03,990 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:17:03,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03 WrapperNode [2024-01-27 15:17:03,991 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:17:03,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:17:03,992 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:17:03,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:17:03,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,086 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 292 [2024-01-27 15:17:04,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:17:04,087 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:17:04,087 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:17:04,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:17:04,101 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,113 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,160 INFO L175 MemorySlicer]: Split 23 memory accesses to 5 slices as follows [2, 15, 2, 2, 2]. 65 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 3, 1, 1, 1]. [2024-01-27 15:17:04,160 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,185 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:17:04,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:17:04,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:17:04,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:17:04,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (1/1) ... [2024-01-27 15:17:04,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:17:04,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:04,225 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 15:17:04,227 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 15:17:04,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:17:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:17:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:17:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:17:04,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:17:04,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:17:04,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:17:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:17:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:17:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:17:04,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:17:04,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:17:04,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:17:04,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:17:04,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:17:04,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:17:04,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:17:04,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:17:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:17:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:17:04,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:17:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:17:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:17:04,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:17:04,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:17:04,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:17:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:17:04,275 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 15:17:04,394 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:17:04,396 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:17:04,770 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:17:04,771 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:17:05,091 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:17:05,092 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-01-27 15:17:05,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:17:05 BoogieIcfgContainer [2024-01-27 15:17:05,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:17:05,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:17:05,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:17:05,097 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:17:05,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:17:03" (1/3) ... [2024-01-27 15:17:05,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4141e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:17:05, skipping insertion in model container [2024-01-27 15:17:05,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:17:03" (2/3) ... [2024-01-27 15:17:05,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4141e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:17:05, skipping insertion in model container [2024-01-27 15:17:05,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:17:05" (3/3) ... [2024-01-27 15:17:05,101 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2024-01-27 15:17:05,109 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:17:05,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:17:05,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:17:05,118 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:17:05,171 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:17:05,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 105 flow [2024-01-27 15:17:05,242 INFO L124 PetriNetUnfolderBase]: 9/39 cut-off events. [2024-01-27 15:17:05,242 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:17:05,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 39 events. 9/39 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-01-27 15:17:05,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 105 flow [2024-01-27 15:17:05,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 94 flow [2024-01-27 15:17:05,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:17:05,267 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;@4d397923, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:17:05,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:17:05,284 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:17:05,285 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2024-01-27 15:17:05,285 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:17:05,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:05,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:05,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:05,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1310840306, now seen corresponding path program 1 times [2024-01-27 15:17:05,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:05,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614157368] [2024-01-27 15:17:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:05,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:06,442 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 15:17:06,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614157368] [2024-01-27 15:17:06,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614157368] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:06,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:17:06,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:17:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921853070] [2024-01-27 15:17:06,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:06,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:17:06,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:06,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:17:06,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:17:06,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:06,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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 15:17:06,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:06,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:06,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:07,380 INFO L124 PetriNetUnfolderBase]: 2963/4045 cut-off events. [2024-01-27 15:17:07,380 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-01-27 15:17:07,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8312 conditions, 4045 events. 2963/4045 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16424 event pairs, 268 based on Foata normal form. 1/2916 useless extension candidates. Maximal degree in co-relation 4518. Up to 1349 conditions per place. [2024-01-27 15:17:07,408 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 16 changer transitions 1/142 dead transitions. [2024-01-27 15:17:07,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 142 transitions, 632 flow [2024-01-27 15:17:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:17:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:17:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-01-27 15:17:07,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-01-27 15:17:07,424 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 94 flow. Second operand 10 states and 182 transitions. [2024-01-27 15:17:07,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 142 transitions, 632 flow [2024-01-27 15:17:07,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 142 transitions, 588 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:17:07,432 INFO L231 Difference]: Finished difference. Result has 46 places, 54 transitions, 182 flow [2024-01-27 15:17:07,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=46, PETRI_TRANSITIONS=54} [2024-01-27 15:17:07,436 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2024-01-27 15:17:07,436 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 54 transitions, 182 flow [2024-01-27 15:17:07,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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 15:17:07,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:07,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:07,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:17:07,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:07,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:07,438 INFO L85 PathProgramCache]: Analyzing trace with hash 223476662, now seen corresponding path program 2 times [2024-01-27 15:17:07,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:07,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026011681] [2024-01-27 15:17:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:07,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:07,883 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 15:17:07,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:07,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026011681] [2024-01-27 15:17:07,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026011681] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:07,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:17:07,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:17:07,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027224648] [2024-01-27 15:17:07,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:07,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:17:07,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:07,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:17:07,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:17:07,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:07,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 54 transitions, 182 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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 15:17:07,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:07,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:07,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:08,609 INFO L124 PetriNetUnfolderBase]: 3361/4649 cut-off events. [2024-01-27 15:17:08,609 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2024-01-27 15:17:08,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10220 conditions, 4649 events. 3361/4649 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20016 event pairs, 338 based on Foata normal form. 1/3818 useless extension candidates. Maximal degree in co-relation 10196. Up to 1457 conditions per place. [2024-01-27 15:17:08,629 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 126 selfloop transitions, 18 changer transitions 1/146 dead transitions. [2024-01-27 15:17:08,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 146 transitions, 685 flow [2024-01-27 15:17:08,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:17:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:17:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-01-27 15:17:08,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-01-27 15:17:08,635 INFO L175 Difference]: Start difference. First operand has 46 places, 54 transitions, 182 flow. Second operand 10 states and 184 transitions. [2024-01-27 15:17:08,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 146 transitions, 685 flow [2024-01-27 15:17:08,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 146 transitions, 679 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-01-27 15:17:08,641 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 246 flow [2024-01-27 15:17:08,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=246, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-01-27 15:17:08,642 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 18 predicate places. [2024-01-27 15:17:08,642 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 246 flow [2024-01-27 15:17:08,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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 15:17:08,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:08,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:08,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:17:08,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:08,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:08,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1310299412, now seen corresponding path program 1 times [2024-01-27 15:17:08,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:08,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231851383] [2024-01-27 15:17:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:08,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:08,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:08,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231851383] [2024-01-27 15:17:08,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231851383] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:08,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791658091] [2024-01-27 15:17:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:08,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:08,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:08,826 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 15:17:08,842 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 15:17:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:08,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:17:08,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:09,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:09,151 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 15:17:09,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791658091] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:09,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:17:09,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-01-27 15:17:09,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119314210] [2024-01-27 15:17:09,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:09,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:17:09,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:09,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:17:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:17:09,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:09,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 246 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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 15:17:09,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:09,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:09,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:09,890 INFO L124 PetriNetUnfolderBase]: 4810/6659 cut-off events. [2024-01-27 15:17:09,890 INFO L125 PetriNetUnfolderBase]: For 2702/2702 co-relation queries the response was YES. [2024-01-27 15:17:09,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15607 conditions, 6659 events. 4810/6659 cut-off events. For 2702/2702 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29861 event pairs, 2522 based on Foata normal form. 1/5505 useless extension candidates. Maximal degree in co-relation 12340. Up to 3223 conditions per place. [2024-01-27 15:17:09,921 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 129 selfloop transitions, 8 changer transitions 7/145 dead transitions. [2024-01-27 15:17:09,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 145 transitions, 777 flow [2024-01-27 15:17:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:17:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:17:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-01-27 15:17:09,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-01-27 15:17:09,923 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 246 flow. Second operand 6 states and 155 transitions. [2024-01-27 15:17:09,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 145 transitions, 777 flow [2024-01-27 15:17:09,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 145 transitions, 754 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-01-27 15:17:09,936 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 258 flow [2024-01-27 15:17:09,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-01-27 15:17:09,937 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 20 predicate places. [2024-01-27 15:17:09,937 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 258 flow [2024-01-27 15:17:09,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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 15:17:09,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:09,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:09,959 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 15:17:10,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:10,153 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:10,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:10,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2084236390, now seen corresponding path program 1 times [2024-01-27 15:17:10,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:10,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364471814] [2024-01-27 15:17:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:10,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:10,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:10,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364471814] [2024-01-27 15:17:10,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364471814] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:10,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983350930] [2024-01-27 15:17:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:10,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:10,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:10,303 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 15:17:10,322 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 15:17:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:10,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:17:10,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:10,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:10,585 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 15:17:10,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983350930] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:10,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:17:10,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-01-27 15:17:10,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835993966] [2024-01-27 15:17:10,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:10,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:17:10,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:10,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:17:10,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:17:10,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:10,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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 15:17:10,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:10,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:10,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:11,646 INFO L124 PetriNetUnfolderBase]: 7299/10084 cut-off events. [2024-01-27 15:17:11,646 INFO L125 PetriNetUnfolderBase]: For 4192/4192 co-relation queries the response was YES. [2024-01-27 15:17:11,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24330 conditions, 10084 events. 7299/10084 cut-off events. For 4192/4192 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 48163 event pairs, 4044 based on Foata normal form. 1/8743 useless extension candidates. Maximal degree in co-relation 20717. Up to 6649 conditions per place. [2024-01-27 15:17:11,696 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 141 selfloop transitions, 8 changer transitions 7/157 dead transitions. [2024-01-27 15:17:11,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 157 transitions, 865 flow [2024-01-27 15:17:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:17:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:17:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-01-27 15:17:11,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-01-27 15:17:11,698 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 258 flow. Second operand 7 states and 159 transitions. [2024-01-27 15:17:11,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 157 transitions, 865 flow [2024-01-27 15:17:11,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 157 transitions, 854 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:17:11,718 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 297 flow [2024-01-27 15:17:11,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-01-27 15:17:11,719 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2024-01-27 15:17:11,719 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 297 flow [2024-01-27 15:17:11,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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 15:17:11,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:11,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:11,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-27 15:17:11,928 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,SelfDestructingSolverStorable3 [2024-01-27 15:17:11,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:11,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:11,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1724503114, now seen corresponding path program 1 times [2024-01-27 15:17:11,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:11,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906703315] [2024-01-27 15:17:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:11,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:12,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:12,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906703315] [2024-01-27 15:17:12,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906703315] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:12,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180493159] [2024-01-27 15:17:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:12,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:12,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:12,224 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 15:17:12,227 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 15:17:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:12,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:17:12,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:12,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:12,877 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 15:17:12,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180493159] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:12,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:17:12,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2024-01-27 15:17:12,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524800482] [2024-01-27 15:17:12,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:12,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:17:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:17:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:17:12,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:12,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 297 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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 15:17:12,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:12,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:12,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:14,168 INFO L124 PetriNetUnfolderBase]: 8221/11360 cut-off events. [2024-01-27 15:17:14,168 INFO L125 PetriNetUnfolderBase]: For 6114/6114 co-relation queries the response was YES. [2024-01-27 15:17:14,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28122 conditions, 11360 events. 8221/11360 cut-off events. For 6114/6114 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 56464 event pairs, 1252 based on Foata normal form. 1/9841 useless extension candidates. Maximal degree in co-relation 24372. Up to 5195 conditions per place. [2024-01-27 15:17:14,238 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 185 selfloop transitions, 18 changer transitions 1/205 dead transitions. [2024-01-27 15:17:14,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 205 transitions, 1142 flow [2024-01-27 15:17:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:17:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:17:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-01-27 15:17:14,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043290043290043 [2024-01-27 15:17:14,240 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 297 flow. Second operand 11 states and 233 transitions. [2024-01-27 15:17:14,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 205 transitions, 1142 flow [2024-01-27 15:17:14,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 205 transitions, 1123 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-27 15:17:14,258 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 374 flow [2024-01-27 15:17:14,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=374, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-01-27 15:17:14,259 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 37 predicate places. [2024-01-27 15:17:14,259 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 374 flow [2024-01-27 15:17:14,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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 15:17:14,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:14,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:14,280 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 15:17:14,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:14,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:14,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1950822736, now seen corresponding path program 2 times [2024-01-27 15:17:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:14,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478982969] [2024-01-27 15:17:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:14,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:14,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478982969] [2024-01-27 15:17:14,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478982969] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:14,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163913627] [2024-01-27 15:17:14,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:17:14,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:14,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:14,771 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 15:17:14,786 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 15:17:14,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 15:17:14,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:17:14,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:17:14,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:15,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:17:15,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163913627] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:15,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:17:15,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-01-27 15:17:15,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977172015] [2024-01-27 15:17:15,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:15,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:17:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:17:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:17:15,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:15,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 374 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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 15:17:15,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:15,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:15,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:16,885 INFO L124 PetriNetUnfolderBase]: 13686/18984 cut-off events. [2024-01-27 15:17:16,885 INFO L125 PetriNetUnfolderBase]: For 15108/15108 co-relation queries the response was YES. [2024-01-27 15:17:16,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48637 conditions, 18984 events. 13686/18984 cut-off events. For 15108/15108 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 103553 event pairs, 2626 based on Foata normal form. 1/16378 useless extension candidates. Maximal degree in co-relation 41518. Up to 6260 conditions per place. [2024-01-27 15:17:16,994 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 178 selfloop transitions, 50 changer transitions 1/230 dead transitions. [2024-01-27 15:17:16,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 230 transitions, 1533 flow [2024-01-27 15:17:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:17:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:17:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-01-27 15:17:16,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-01-27 15:17:16,996 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 374 flow. Second operand 10 states and 198 transitions. [2024-01-27 15:17:16,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 230 transitions, 1533 flow [2024-01-27 15:17:17,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 230 transitions, 1447 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-01-27 15:17:17,070 INFO L231 Difference]: Finished difference. Result has 86 places, 111 transitions, 819 flow [2024-01-27 15:17:17,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=819, PETRI_PLACES=86, PETRI_TRANSITIONS=111} [2024-01-27 15:17:17,071 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 47 predicate places. [2024-01-27 15:17:17,071 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 111 transitions, 819 flow [2024-01-27 15:17:17,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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 15:17:17,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:17,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:17,095 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 15:17:17,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:17,295 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:17,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:17,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1125886898, now seen corresponding path program 1 times [2024-01-27 15:17:17,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:17,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075245125] [2024-01-27 15:17:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:17,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:17,408 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 15:17:17,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:17,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075245125] [2024-01-27 15:17:17,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075245125] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:17,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:17:17,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:17:17,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472299523] [2024-01-27 15:17:17,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:17,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:17:17,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:17:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:17:17,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:17,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 111 transitions, 819 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:17,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:17,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:17,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:18,585 INFO L124 PetriNetUnfolderBase]: 9417/13595 cut-off events. [2024-01-27 15:17:18,585 INFO L125 PetriNetUnfolderBase]: For 18693/18693 co-relation queries the response was YES. [2024-01-27 15:17:18,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37516 conditions, 13595 events. 9417/13595 cut-off events. For 18693/18693 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 75642 event pairs, 3416 based on Foata normal form. 0/12158 useless extension candidates. Maximal degree in co-relation 34124. Up to 8388 conditions per place. [2024-01-27 15:17:18,642 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 119 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-01-27 15:17:18,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 147 transitions, 1199 flow [2024-01-27 15:17:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:17:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:17:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-01-27 15:17:18,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:17:18,644 INFO L175 Difference]: Start difference. First operand has 86 places, 111 transitions, 819 flow. Second operand 6 states and 112 transitions. [2024-01-27 15:17:18,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 147 transitions, 1199 flow [2024-01-27 15:17:18,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 147 transitions, 1165 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-01-27 15:17:18,750 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 794 flow [2024-01-27 15:17:18,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=794, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-01-27 15:17:18,751 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 53 predicate places. [2024-01-27 15:17:18,751 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 794 flow [2024-01-27 15:17:18,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:18,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:18,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:18,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:17:18,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:18,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash -692351364, now seen corresponding path program 3 times [2024-01-27 15:17:18,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:18,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972894219] [2024-01-27 15:17:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:18,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:19,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:19,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972894219] [2024-01-27 15:17:19,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972894219] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:19,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826855393] [2024-01-27 15:17:19,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:17:19,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:19,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:19,068 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 15:17:19,091 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 15:17:19,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-27 15:17:19,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:17:19,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:17:19,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:19,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:17:19,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826855393] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:19,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:17:19,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-01-27 15:17:19,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698439781] [2024-01-27 15:17:19,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:19,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:17:19,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:19,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:17:19,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:17:19,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:19,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 794 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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 15:17:19,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:19,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:19,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:20,564 INFO L124 PetriNetUnfolderBase]: 10335/14894 cut-off events. [2024-01-27 15:17:20,565 INFO L125 PetriNetUnfolderBase]: For 21315/21315 co-relation queries the response was YES. [2024-01-27 15:17:20,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41236 conditions, 14894 events. 10335/14894 cut-off events. For 21315/21315 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 84957 event pairs, 1748 based on Foata normal form. 1/13453 useless extension candidates. Maximal degree in co-relation 37789. Up to 5644 conditions per place. [2024-01-27 15:17:20,641 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 150 selfloop transitions, 49 changer transitions 3/203 dead transitions. [2024-01-27 15:17:20,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 203 transitions, 1594 flow [2024-01-27 15:17:20,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:17:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:17:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-01-27 15:17:20,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-01-27 15:17:20,644 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 794 flow. Second operand 10 states and 182 transitions. [2024-01-27 15:17:20,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 203 transitions, 1594 flow [2024-01-27 15:17:20,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 203 transitions, 1578 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:17:20,748 INFO L231 Difference]: Finished difference. Result has 101 places, 113 transitions, 1047 flow [2024-01-27 15:17:20,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1047, PETRI_PLACES=101, PETRI_TRANSITIONS=113} [2024-01-27 15:17:20,749 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 62 predicate places. [2024-01-27 15:17:20,749 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 113 transitions, 1047 flow [2024-01-27 15:17:20,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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 15:17:20,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:20,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:20,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-27 15:17:20,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:20,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:20,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1639729848, now seen corresponding path program 1 times [2024-01-27 15:17:20,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:20,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689852887] [2024-01-27 15:17:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:20,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:21,104 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 15:17:21,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:21,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689852887] [2024-01-27 15:17:21,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689852887] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:21,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:17:21,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:17:21,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989561821] [2024-01-27 15:17:21,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:21,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:17:21,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:21,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:17:21,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:17:21,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:21,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 113 transitions, 1047 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:21,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:21,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:21,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:21,979 INFO L124 PetriNetUnfolderBase]: 7152/10621 cut-off events. [2024-01-27 15:17:21,979 INFO L125 PetriNetUnfolderBase]: For 24150/24150 co-relation queries the response was YES. [2024-01-27 15:17:22,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30732 conditions, 10621 events. 7152/10621 cut-off events. For 24150/24150 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 61439 event pairs, 3047 based on Foata normal form. 0/9887 useless extension candidates. Maximal degree in co-relation 28427. Up to 5448 conditions per place. [2024-01-27 15:17:22,027 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 126 selfloop transitions, 9 changer transitions 19/155 dead transitions. [2024-01-27 15:17:22,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 155 transitions, 1475 flow [2024-01-27 15:17:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:17:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:17:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-01-27 15:17:22,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-01-27 15:17:22,029 INFO L175 Difference]: Start difference. First operand has 101 places, 113 transitions, 1047 flow. Second operand 5 states and 108 transitions. [2024-01-27 15:17:22,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 155 transitions, 1475 flow [2024-01-27 15:17:22,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 155 transitions, 1343 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-01-27 15:17:22,154 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 686 flow [2024-01-27 15:17:22,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=686, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2024-01-27 15:17:22,155 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 58 predicate places. [2024-01-27 15:17:22,155 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 686 flow [2024-01-27 15:17:22,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:22,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:22,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:22,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:17:22,156 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:22,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:22,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1582894396, now seen corresponding path program 4 times [2024-01-27 15:17:22,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:22,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872480617] [2024-01-27 15:17:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:22,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:22,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:22,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872480617] [2024-01-27 15:17:22,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872480617] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:22,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959688768] [2024-01-27 15:17:22,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:17:22,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:22,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:22,460 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 15:17:22,468 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 15:17:22,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:17:22,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:17:22,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:17:22,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:22,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:17:22,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959688768] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:22,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:17:22,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2024-01-27 15:17:22,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507980969] [2024-01-27 15:17:22,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:22,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:17:22,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:17:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:17:22,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:22,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 686 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:22,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:22,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:22,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:23,684 INFO L124 PetriNetUnfolderBase]: 7872/11344 cut-off events. [2024-01-27 15:17:23,685 INFO L125 PetriNetUnfolderBase]: For 18247/18247 co-relation queries the response was YES. [2024-01-27 15:17:23,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31711 conditions, 11344 events. 7872/11344 cut-off events. For 18247/18247 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 61822 event pairs, 696 based on Foata normal form. 2/10854 useless extension candidates. Maximal degree in co-relation 31590. Up to 3725 conditions per place. [2024-01-27 15:17:23,733 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 41 changer transitions 1/168 dead transitions. [2024-01-27 15:17:23,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 168 transitions, 1365 flow [2024-01-27 15:17:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:17:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:17:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-01-27 15:17:23,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-01-27 15:17:23,735 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 686 flow. Second operand 6 states and 134 transitions. [2024-01-27 15:17:23,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 168 transitions, 1365 flow [2024-01-27 15:17:23,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 168 transitions, 1325 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-01-27 15:17:23,787 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 950 flow [2024-01-27 15:17:23,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=950, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2024-01-27 15:17:23,788 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 53 predicate places. [2024-01-27 15:17:23,788 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 950 flow [2024-01-27 15:17:23,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:23,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:23,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:23,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:17:23,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:23,996 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:23,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:23,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1954180808, now seen corresponding path program 1 times [2024-01-27 15:17:23,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:23,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20718917] [2024-01-27 15:17:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:23,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20718917] [2024-01-27 15:17:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20718917] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:24,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:17:24,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:17:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047809991] [2024-01-27 15:17:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:17:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:17:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:17:24,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:24,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 950 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:17:24,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:24,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:24,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:24,780 INFO L124 PetriNetUnfolderBase]: 6516/9416 cut-off events. [2024-01-27 15:17:24,780 INFO L125 PetriNetUnfolderBase]: For 25181/25181 co-relation queries the response was YES. [2024-01-27 15:17:24,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28746 conditions, 9416 events. 6516/9416 cut-off events. For 25181/25181 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 50136 event pairs, 3896 based on Foata normal form. 0/9110 useless extension candidates. Maximal degree in co-relation 24578. Up to 6927 conditions per place. [2024-01-27 15:17:24,817 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 72 selfloop transitions, 2 changer transitions 64/139 dead transitions. [2024-01-27 15:17:24,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 139 transitions, 1351 flow [2024-01-27 15:17:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:17:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:17:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-01-27 15:17:24,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-01-27 15:17:24,819 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 950 flow. Second operand 5 states and 101 transitions. [2024-01-27 15:17:24,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 139 transitions, 1351 flow [2024-01-27 15:17:24,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 139 transitions, 1287 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-01-27 15:17:24,897 INFO L231 Difference]: Finished difference. Result has 96 places, 75 transitions, 577 flow [2024-01-27 15:17:24,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=577, PETRI_PLACES=96, PETRI_TRANSITIONS=75} [2024-01-27 15:17:24,897 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 57 predicate places. [2024-01-27 15:17:24,898 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 75 transitions, 577 flow [2024-01-27 15:17:24,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:17:24,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:24,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:24,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-27 15:17:24,898 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:24,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1429010112, now seen corresponding path program 1 times [2024-01-27 15:17:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:24,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95614966] [2024-01-27 15:17:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:24,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:24,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:24,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95614966] [2024-01-27 15:17:24,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95614966] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:24,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:17:24,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:17:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151576332] [2024-01-27 15:17:24,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:24,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:17:24,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:17:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:17:24,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:24,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 75 transitions, 577 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:17:24,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:24,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:24,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:25,458 INFO L124 PetriNetUnfolderBase]: 3851/5449 cut-off events. [2024-01-27 15:17:25,458 INFO L125 PetriNetUnfolderBase]: For 11643/11643 co-relation queries the response was YES. [2024-01-27 15:17:25,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16084 conditions, 5449 events. 3851/5449 cut-off events. For 11643/11643 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25536 event pairs, 1915 based on Foata normal form. 154/5600 useless extension candidates. Maximal degree in co-relation 16042. Up to 3302 conditions per place. [2024-01-27 15:17:25,478 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 49 selfloop transitions, 2 changer transitions 54/106 dead transitions. [2024-01-27 15:17:25,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 838 flow [2024-01-27 15:17:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:17:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:17:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-01-27 15:17:25,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-27 15:17:25,479 INFO L175 Difference]: Start difference. First operand has 96 places, 75 transitions, 577 flow. Second operand 6 states and 105 transitions. [2024-01-27 15:17:25,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 838 flow [2024-01-27 15:17:25,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 774 flow, removed 25 selfloop flow, removed 12 redundant places. [2024-01-27 15:17:25,504 INFO L231 Difference]: Finished difference. Result has 79 places, 52 transitions, 263 flow [2024-01-27 15:17:25,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=79, PETRI_TRANSITIONS=52} [2024-01-27 15:17:25,504 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 40 predicate places. [2024-01-27 15:17:25,504 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 52 transitions, 263 flow [2024-01-27 15:17:25,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:17:25,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:25,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:25,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:17:25,505 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:25,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:25,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1706240590, now seen corresponding path program 1 times [2024-01-27 15:17:25,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:25,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34481858] [2024-01-27 15:17:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:25,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:25,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:25,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34481858] [2024-01-27 15:17:25,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34481858] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:25,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045661834] [2024-01-27 15:17:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:25,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:25,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:25,616 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 15:17:25,620 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 15:17:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:25,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:17:25,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:25,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:17:25,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045661834] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:25,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:17:25,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2024-01-27 15:17:25,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078820423] [2024-01-27 15:17:25,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:25,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:17:25,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:25,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:17:25,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:17:25,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:25,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 52 transitions, 263 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 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 15:17:25,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:25,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:25,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:26,337 INFO L124 PetriNetUnfolderBase]: 3594/4979 cut-off events. [2024-01-27 15:17:26,338 INFO L125 PetriNetUnfolderBase]: For 6639/6639 co-relation queries the response was YES. [2024-01-27 15:17:26,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13943 conditions, 4979 events. 3594/4979 cut-off events. For 6639/6639 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21484 event pairs, 1853 based on Foata normal form. 146/4839 useless extension candidates. Maximal degree in co-relation 13919. Up to 2487 conditions per place. [2024-01-27 15:17:26,368 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 74 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2024-01-27 15:17:26,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 581 flow [2024-01-27 15:17:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:17:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:17:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-01-27 15:17:26,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3163265306122449 [2024-01-27 15:17:26,370 INFO L175 Difference]: Start difference. First operand has 79 places, 52 transitions, 263 flow. Second operand 7 states and 93 transitions. [2024-01-27 15:17:26,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 581 flow [2024-01-27 15:17:26,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 515 flow, removed 31 selfloop flow, removed 12 redundant places. [2024-01-27 15:17:26,395 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 260 flow [2024-01-27 15:17:26,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=260, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-01-27 15:17:26,395 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 21 predicate places. [2024-01-27 15:17:26,396 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 260 flow [2024-01-27 15:17:26,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 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 15:17:26,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:26,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:26,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:17:26,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:26,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:26,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:26,611 INFO L85 PathProgramCache]: Analyzing trace with hash -74119910, now seen corresponding path program 1 times [2024-01-27 15:17:26,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:26,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007250929] [2024-01-27 15:17:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:26,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:26,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:26,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007250929] [2024-01-27 15:17:26,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007250929] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:26,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:17:26,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:17:26,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112450347] [2024-01-27 15:17:26,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:26,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:17:26,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:26,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:17:26,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:17:26,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:26,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 15:17:26,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:26,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:26,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:27,260 INFO L124 PetriNetUnfolderBase]: 3594/4973 cut-off events. [2024-01-27 15:17:27,260 INFO L125 PetriNetUnfolderBase]: For 4967/4967 co-relation queries the response was YES. [2024-01-27 15:17:27,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13707 conditions, 4973 events. 3594/4973 cut-off events. For 4967/4967 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21800 event pairs, 1422 based on Foata normal form. 3/4452 useless extension candidates. Maximal degree in co-relation 13691. Up to 3011 conditions per place. [2024-01-27 15:17:27,271 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 71 selfloop transitions, 3 changer transitions 30/105 dead transitions. [2024-01-27 15:17:27,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 105 transitions, 678 flow [2024-01-27 15:17:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:17:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:17:27,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-01-27 15:17:27,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-01-27 15:17:27,272 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 260 flow. Second operand 4 states and 94 transitions. [2024-01-27 15:17:27,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 105 transitions, 678 flow [2024-01-27 15:17:27,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 105 transitions, 653 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-01-27 15:17:27,278 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 239 flow [2024-01-27 15:17:27,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-01-27 15:17:27,279 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 20 predicate places. [2024-01-27 15:17:27,279 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 239 flow [2024-01-27 15:17:27,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 15:17:27,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:27,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:27,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-27 15:17:27,280 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:27,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:27,280 INFO L85 PathProgramCache]: Analyzing trace with hash -254196320, now seen corresponding path program 1 times [2024-01-27 15:17:27,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:27,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996555008] [2024-01-27 15:17:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:27,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:27,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:27,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996555008] [2024-01-27 15:17:27,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996555008] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:27,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024477748] [2024-01-27 15:17:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:27,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:27,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:27,579 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 15:17:27,596 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 15:17:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:27,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:17:27,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:27,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:28,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024477748] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:17:28,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:17:28,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-01-27 15:17:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567666864] [2024-01-27 15:17:28,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:17:28,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:17:28,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:28,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:17:28,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:17:28,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:28,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 239 flow. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 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 15:17:28,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:28,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:28,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:29,218 INFO L124 PetriNetUnfolderBase]: 6369/8807 cut-off events. [2024-01-27 15:17:29,218 INFO L125 PetriNetUnfolderBase]: For 9750/9750 co-relation queries the response was YES. [2024-01-27 15:17:29,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24600 conditions, 8807 events. 6369/8807 cut-off events. For 9750/9750 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 42111 event pairs, 1460 based on Foata normal form. 1/7873 useless extension candidates. Maximal degree in co-relation 24583. Up to 3692 conditions per place. [2024-01-27 15:17:29,257 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 143 selfloop transitions, 22 changer transitions 1/167 dead transitions. [2024-01-27 15:17:29,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 167 transitions, 1015 flow [2024-01-27 15:17:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:17:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:17:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-01-27 15:17:29,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-01-27 15:17:29,258 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 239 flow. Second operand 12 states and 192 transitions. [2024-01-27 15:17:29,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 167 transitions, 1015 flow [2024-01-27 15:17:29,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 167 transitions, 981 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-27 15:17:29,279 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 427 flow [2024-01-27 15:17:29,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=427, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-01-27 15:17:29,280 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 32 predicate places. [2024-01-27 15:17:29,280 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 427 flow [2024-01-27 15:17:29,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 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 15:17:29,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:29,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:29,292 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 15:17:29,481 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,SelfDestructingSolverStorable14 [2024-01-27 15:17:29,481 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:29,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:29,482 INFO L85 PathProgramCache]: Analyzing trace with hash 589652670, now seen corresponding path program 2 times [2024-01-27 15:17:29,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:29,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642864408] [2024-01-27 15:17:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:29,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:29,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642864408] [2024-01-27 15:17:29,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642864408] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:29,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910305006] [2024-01-27 15:17:29,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:17:29,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:29,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:29,773 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 15:17:29,791 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 15:17:29,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 15:17:29,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:17:29,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:17:29,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:17:30,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:17:30,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910305006] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:30,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:17:30,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2024-01-27 15:17:30,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926073829] [2024-01-27 15:17:30,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:30,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:17:30,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:17:30,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:17:30,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:30,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 427 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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 15:17:30,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:30,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:30,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:30,894 INFO L124 PetriNetUnfolderBase]: 7637/10527 cut-off events. [2024-01-27 15:17:30,895 INFO L125 PetriNetUnfolderBase]: For 17022/17022 co-relation queries the response was YES. [2024-01-27 15:17:30,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30157 conditions, 10527 events. 7637/10527 cut-off events. For 17022/17022 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 51654 event pairs, 1732 based on Foata normal form. 1/9386 useless extension candidates. Maximal degree in co-relation 30136. Up to 4060 conditions per place. [2024-01-27 15:17:30,953 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 148 selfloop transitions, 20 changer transitions 1/170 dead transitions. [2024-01-27 15:17:30,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 170 transitions, 1150 flow [2024-01-27 15:17:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:17:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:17:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-01-27 15:17:30,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-01-27 15:17:30,957 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 427 flow. Second operand 10 states and 181 transitions. [2024-01-27 15:17:30,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 170 transitions, 1150 flow [2024-01-27 15:17:31,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 170 transitions, 1127 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-01-27 15:17:31,006 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 529 flow [2024-01-27 15:17:31,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=529, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2024-01-27 15:17:31,006 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 41 predicate places. [2024-01-27 15:17:31,007 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 529 flow [2024-01-27 15:17:31,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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 15:17:31,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:31,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:31,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:17:31,216 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,SelfDestructingSolverStorable15 [2024-01-27 15:17:31,216 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:31,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:31,216 INFO L85 PathProgramCache]: Analyzing trace with hash 227247490, now seen corresponding path program 3 times [2024-01-27 15:17:31,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:31,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722046138] [2024-01-27 15:17:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:31,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:31,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:31,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722046138] [2024-01-27 15:17:31,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722046138] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:31,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178002905] [2024-01-27 15:17:31,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:17:31,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:31,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:31,528 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 15:17:31,557 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 15:17:31,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-27 15:17:31,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:17:31,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:17:31,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:17:31,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:17:31,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178002905] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:31,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:17:31,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-01-27 15:17:31,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988968256] [2024-01-27 15:17:31,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:17:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:17:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:17:31,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:31,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 529 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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 15:17:31,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:31,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:31,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:32,712 INFO L124 PetriNetUnfolderBase]: 8283/11518 cut-off events. [2024-01-27 15:17:32,712 INFO L125 PetriNetUnfolderBase]: For 23611/23611 co-relation queries the response was YES. [2024-01-27 15:17:32,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33937 conditions, 11518 events. 8283/11518 cut-off events. For 23611/23611 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 57950 event pairs, 2156 based on Foata normal form. 1/10322 useless extension candidates. Maximal degree in co-relation 33913. Up to 3750 conditions per place. [2024-01-27 15:17:32,762 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 148 selfloop transitions, 33 changer transitions 1/183 dead transitions. [2024-01-27 15:17:32,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 183 transitions, 1344 flow [2024-01-27 15:17:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:17:32,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:17:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-01-27 15:17:32,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-01-27 15:17:32,763 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 529 flow. Second operand 10 states and 187 transitions. [2024-01-27 15:17:32,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 183 transitions, 1344 flow [2024-01-27 15:17:32,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 183 transitions, 1302 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-01-27 15:17:32,789 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 768 flow [2024-01-27 15:17:32,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=768, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-01-27 15:17:32,790 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 48 predicate places. [2024-01-27 15:17:32,790 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 768 flow [2024-01-27 15:17:32,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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 15:17:32,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:32,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:32,804 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 15:17:32,998 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,SelfDestructingSolverStorable16 [2024-01-27 15:17:32,998 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:32,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1960526416, now seen corresponding path program 4 times [2024-01-27 15:17:32,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:32,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583147644] [2024-01-27 15:17:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:32,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:33,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:33,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583147644] [2024-01-27 15:17:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583147644] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:33,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116970491] [2024-01-27 15:17:33,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:17:33,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:33,260 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 15:17:33,262 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 15:17:33,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:17:33,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:17:33,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:17:33,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:33,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:34,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116970491] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:34,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:17:34,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 20 [2024-01-27 15:17:34,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435936607] [2024-01-27 15:17:34,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:34,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:17:34,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:34,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:17:34,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:17:34,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:34,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 768 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 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 15:17:34,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:34,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:34,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:35,965 INFO L124 PetriNetUnfolderBase]: 18503/26335 cut-off events. [2024-01-27 15:17:35,965 INFO L125 PetriNetUnfolderBase]: For 61792/61792 co-relation queries the response was YES. [2024-01-27 15:17:36,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75742 conditions, 26335 events. 18503/26335 cut-off events. For 61792/61792 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 158722 event pairs, 2782 based on Foata normal form. 2/23116 useless extension candidates. Maximal degree in co-relation 75715. Up to 8799 conditions per place. [2024-01-27 15:17:36,111 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 214 selfloop transitions, 58 changer transitions 5/278 dead transitions. [2024-01-27 15:17:36,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 278 transitions, 2704 flow [2024-01-27 15:17:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:17:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:17:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-01-27 15:17:36,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-01-27 15:17:36,112 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 768 flow. Second operand 9 states and 199 transitions. [2024-01-27 15:17:36,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 278 transitions, 2704 flow [2024-01-27 15:17:36,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 278 transitions, 2610 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-01-27 15:17:36,270 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 1318 flow [2024-01-27 15:17:36,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1318, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-01-27 15:17:36,271 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 59 predicate places. [2024-01-27 15:17:36,271 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 1318 flow [2024-01-27 15:17:36,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 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 15:17:36,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:36,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:36,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:17:36,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:17:36,487 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:36,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:36,487 INFO L85 PathProgramCache]: Analyzing trace with hash -971356568, now seen corresponding path program 5 times [2024-01-27 15:17:36,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:36,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609689194] [2024-01-27 15:17:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:36,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:36,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609689194] [2024-01-27 15:17:36,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609689194] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:36,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771506906] [2024-01-27 15:17:36,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:17:36,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:36,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:17:36,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:17:37,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:17:37,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:17:37,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:17:37,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:37,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:37,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771506906] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:37,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:17:37,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 21 [2024-01-27 15:17:37,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970011613] [2024-01-27 15:17:37,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:37,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:17:37,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:37,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:17:37,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:17:37,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:37,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 1318 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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 15:17:37,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:37,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:37,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:39,624 INFO L124 PetriNetUnfolderBase]: 19469/27674 cut-off events. [2024-01-27 15:17:39,624 INFO L125 PetriNetUnfolderBase]: For 85170/85170 co-relation queries the response was YES. [2024-01-27 15:17:39,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91572 conditions, 27674 events. 19469/27674 cut-off events. For 85170/85170 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 167069 event pairs, 5458 based on Foata normal form. 4/26073 useless extension candidates. Maximal degree in co-relation 91539. Up to 9685 conditions per place. [2024-01-27 15:17:39,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 46 changer transitions 1/281 dead transitions. [2024-01-27 15:17:39,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 281 transitions, 2764 flow [2024-01-27 15:17:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:17:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:17:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-01-27 15:17:39,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-01-27 15:17:39,819 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 1318 flow. Second operand 10 states and 204 transitions. [2024-01-27 15:17:39,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 281 transitions, 2764 flow [2024-01-27 15:17:40,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 281 transitions, 2736 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-27 15:17:40,050 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 1586 flow [2024-01-27 15:17:40,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1586, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2024-01-27 15:17:40,051 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 70 predicate places. [2024-01-27 15:17:40,051 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 1586 flow [2024-01-27 15:17:40,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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 15:17:40,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:40,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:40,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:17:40,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:40,257 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:40,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:40,258 INFO L85 PathProgramCache]: Analyzing trace with hash -794599444, now seen corresponding path program 6 times [2024-01-27 15:17:40,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:40,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168042970] [2024-01-27 15:17:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:40,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:40,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:40,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168042970] [2024-01-27 15:17:40,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168042970] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:40,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027678089] [2024-01-27 15:17:40,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:17:40,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:40,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:40,564 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:17:40,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:17:40,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-27 15:17:40,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:17:40,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:17:40,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:17:40,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:17:40,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027678089] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:40,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:17:40,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-01-27 15:17:40,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996933095] [2024-01-27 15:17:40,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:40,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:17:40,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:40,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:17:40,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:17:40,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:40,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 1586 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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 15:17:40,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:40,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:40,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:43,237 INFO L124 PetriNetUnfolderBase]: 19469/27666 cut-off events. [2024-01-27 15:17:43,238 INFO L125 PetriNetUnfolderBase]: For 103042/103042 co-relation queries the response was YES. [2024-01-27 15:17:43,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95412 conditions, 27666 events. 19469/27666 cut-off events. For 103042/103042 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 164955 event pairs, 5708 based on Foata normal form. 4/26065 useless extension candidates. Maximal degree in co-relation 95375. Up to 9684 conditions per place. [2024-01-27 15:17:43,380 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 202 selfloop transitions, 50 changer transitions 1/254 dead transitions. [2024-01-27 15:17:43,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 254 transitions, 2728 flow [2024-01-27 15:17:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:17:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:17:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-01-27 15:17:43,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-01-27 15:17:43,382 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 1586 flow. Second operand 10 states and 185 transitions. [2024-01-27 15:17:43,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 254 transitions, 2728 flow [2024-01-27 15:17:43,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 254 transitions, 2661 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-01-27 15:17:43,629 INFO L231 Difference]: Finished difference. Result has 117 places, 141 transitions, 1862 flow [2024-01-27 15:17:43,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1862, PETRI_PLACES=117, PETRI_TRANSITIONS=141} [2024-01-27 15:17:43,630 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 78 predicate places. [2024-01-27 15:17:43,630 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 141 transitions, 1862 flow [2024-01-27 15:17:43,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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 15:17:43,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:43,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:43,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:17:43,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-01-27 15:17:43,842 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:43,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:43,843 INFO L85 PathProgramCache]: Analyzing trace with hash -168630470, now seen corresponding path program 7 times [2024-01-27 15:17:43,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:43,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28467623] [2024-01-27 15:17:43,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:43,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:44,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:44,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28467623] [2024-01-27 15:17:44,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28467623] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:44,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209020521] [2024-01-27 15:17:44,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:17:44,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:44,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:44,118 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:17:44,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:17:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:44,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:17:44,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:44,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:44,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209020521] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:44,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:17:44,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 22 [2024-01-27 15:17:44,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494875868] [2024-01-27 15:17:44,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:44,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:17:44,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:44,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:17:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:17:44,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:44,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 141 transitions, 1862 flow. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:44,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:44,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:44,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:47,912 INFO L124 PetriNetUnfolderBase]: 19469/27660 cut-off events. [2024-01-27 15:17:47,912 INFO L125 PetriNetUnfolderBase]: For 117886/117886 co-relation queries the response was YES. [2024-01-27 15:17:47,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96271 conditions, 27660 events. 19469/27660 cut-off events. For 117886/117886 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 166955 event pairs, 5658 based on Foata normal form. 3/26058 useless extension candidates. Maximal degree in co-relation 96230. Up to 9684 conditions per place. [2024-01-27 15:17:48,046 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 47 changer transitions 1/267 dead transitions. [2024-01-27 15:17:48,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 267 transitions, 2972 flow [2024-01-27 15:17:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:17:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:17:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-01-27 15:17:48,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-01-27 15:17:48,047 INFO L175 Difference]: Start difference. First operand has 117 places, 141 transitions, 1862 flow. Second operand 11 states and 194 transitions. [2024-01-27 15:17:48,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 267 transitions, 2972 flow [2024-01-27 15:17:48,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 267 transitions, 2936 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-01-27 15:17:48,293 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1930 flow [2024-01-27 15:17:48,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1930, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2024-01-27 15:17:48,293 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 85 predicate places. [2024-01-27 15:17:48,294 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1930 flow [2024-01-27 15:17:48,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:17:48,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:48,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:48,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:17:48,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:48,494 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:48,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:48,495 INFO L85 PathProgramCache]: Analyzing trace with hash -832537392, now seen corresponding path program 1 times [2024-01-27 15:17:48,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:48,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875542486] [2024-01-27 15:17:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:48,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:48,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:48,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875542486] [2024-01-27 15:17:48,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875542486] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304968394] [2024-01-27 15:17:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:48,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:48,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:48,652 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:17:48,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:17:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:48,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:17:48,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:48,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:17:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:17:48,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304968394] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:17:48,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:17:48,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-01-27 15:17:48,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109834859] [2024-01-27 15:17:48,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:17:48,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:17:48,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:17:48,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:17:48,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:48,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 1930 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 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 15:17:48,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:48,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:48,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:52,896 INFO L124 PetriNetUnfolderBase]: 24797/35388 cut-off events. [2024-01-27 15:17:52,896 INFO L125 PetriNetUnfolderBase]: For 152982/152982 co-relation queries the response was YES. [2024-01-27 15:17:53,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123509 conditions, 35388 events. 24797/35388 cut-off events. For 152982/152982 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 221847 event pairs, 10004 based on Foata normal form. 0/33783 useless extension candidates. Maximal degree in co-relation 123467. Up to 11589 conditions per place. [2024-01-27 15:17:53,117 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 314 selfloop transitions, 17 changer transitions 0/332 dead transitions. [2024-01-27 15:17:53,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 332 transitions, 4432 flow [2024-01-27 15:17:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:17:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:17:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-01-27 15:17:53,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-01-27 15:17:53,118 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1930 flow. Second operand 11 states and 179 transitions. [2024-01-27 15:17:53,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 332 transitions, 4432 flow [2024-01-27 15:17:53,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 332 transitions, 4336 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-01-27 15:17:53,466 INFO L231 Difference]: Finished difference. Result has 128 places, 145 transitions, 1905 flow [2024-01-27 15:17:53,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1905, PETRI_PLACES=128, PETRI_TRANSITIONS=145} [2024-01-27 15:17:53,467 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 89 predicate places. [2024-01-27 15:17:53,467 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 145 transitions, 1905 flow [2024-01-27 15:17:53,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 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 15:17:53,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:53,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:53,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:17:53,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:53,680 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:53,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:53,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2087364536, now seen corresponding path program 1 times [2024-01-27 15:17:53,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:53,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983177791] [2024-01-27 15:17:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:53,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:53,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:53,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983177791] [2024-01-27 15:17:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983177791] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:53,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:17:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:17:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46277735] [2024-01-27 15:17:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:53,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:17:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:17:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:17:53,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:53,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 145 transitions, 1905 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 15:17:53,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:53,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:53,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:56,483 INFO L124 PetriNetUnfolderBase]: 17138/24781 cut-off events. [2024-01-27 15:17:56,483 INFO L125 PetriNetUnfolderBase]: For 103300/103300 co-relation queries the response was YES. [2024-01-27 15:17:56,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88792 conditions, 24781 events. 17138/24781 cut-off events. For 103300/103300 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 148752 event pairs, 10630 based on Foata normal form. 538/25319 useless extension candidates. Maximal degree in co-relation 88749. Up to 17412 conditions per place. [2024-01-27 15:17:56,614 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 143 selfloop transitions, 15 changer transitions 2/161 dead transitions. [2024-01-27 15:17:56,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 161 transitions, 1926 flow [2024-01-27 15:17:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:17:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:17:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-01-27 15:17:56,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-01-27 15:17:56,615 INFO L175 Difference]: Start difference. First operand has 128 places, 145 transitions, 1905 flow. Second operand 5 states and 101 transitions. [2024-01-27 15:17:56,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 161 transitions, 1926 flow [2024-01-27 15:17:56,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 161 transitions, 1793 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-01-27 15:17:56,910 INFO L231 Difference]: Finished difference. Result has 123 places, 121 transitions, 1342 flow [2024-01-27 15:17:56,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1342, PETRI_PLACES=123, PETRI_TRANSITIONS=121} [2024-01-27 15:17:56,911 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 84 predicate places. [2024-01-27 15:17:56,911 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 1342 flow [2024-01-27 15:17:56,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 15:17:56,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:56,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:56,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-01-27 15:17:56,911 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:56,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1805183098, now seen corresponding path program 1 times [2024-01-27 15:17:56,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:56,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873127364] [2024-01-27 15:17:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:56,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:57,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:57,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873127364] [2024-01-27 15:17:57,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873127364] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:17:57,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:17:57,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:17:57,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650919388] [2024-01-27 15:17:57,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:17:57,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:17:57,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:17:57,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:17:57,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:17:57,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:17:57,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 121 transitions, 1342 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 15:17:57,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:17:57,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:17:57,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:17:59,170 INFO L124 PetriNetUnfolderBase]: 14851/21708 cut-off events. [2024-01-27 15:17:59,170 INFO L125 PetriNetUnfolderBase]: For 73439/73439 co-relation queries the response was YES. [2024-01-27 15:17:59,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75470 conditions, 21708 events. 14851/21708 cut-off events. For 73439/73439 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 132301 event pairs, 9927 based on Foata normal form. 452/22160 useless extension candidates. Maximal degree in co-relation 75431. Up to 17412 conditions per place. [2024-01-27 15:17:59,285 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 72 selfloop transitions, 2 changer transitions 65/140 dead transitions. [2024-01-27 15:17:59,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 140 transitions, 1517 flow [2024-01-27 15:17:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:17:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:17:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-01-27 15:17:59,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-01-27 15:17:59,286 INFO L175 Difference]: Start difference. First operand has 123 places, 121 transitions, 1342 flow. Second operand 5 states and 94 transitions. [2024-01-27 15:17:59,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 140 transitions, 1517 flow [2024-01-27 15:17:59,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 140 transitions, 1485 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-01-27 15:17:59,582 INFO L231 Difference]: Finished difference. Result has 120 places, 75 transitions, 579 flow [2024-01-27 15:17:59,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=579, PETRI_PLACES=120, PETRI_TRANSITIONS=75} [2024-01-27 15:17:59,583 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 81 predicate places. [2024-01-27 15:17:59,583 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 75 transitions, 579 flow [2024-01-27 15:17:59,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 15:17:59,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:17:59,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:17:59,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-01-27 15:17:59,584 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:17:59,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:17:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash -779794704, now seen corresponding path program 1 times [2024-01-27 15:17:59,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:17:59,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819483372] [2024-01-27 15:17:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:59,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:17:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:17:59,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:17:59,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819483372] [2024-01-27 15:17:59,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819483372] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:17:59,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452384161] [2024-01-27 15:17:59,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:17:59,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:17:59,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:17:59,714 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:17:59,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:17:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:17:59,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:17:59,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:17:59,946 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 15:17:59,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:18:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:18:00,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452384161] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:18:00,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:18:00,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2024-01-27 15:18:00,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650727840] [2024-01-27 15:18:00,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:18:00,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:18:00,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:18:00,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:18:00,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:18:00,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:18:00,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 75 transitions, 579 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 15:18:00,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:18:00,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:18:00,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:18:01,038 INFO L124 PetriNetUnfolderBase]: 7840/11143 cut-off events. [2024-01-27 15:18:01,038 INFO L125 PetriNetUnfolderBase]: For 35098/35098 co-relation queries the response was YES. [2024-01-27 15:18:01,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40237 conditions, 11143 events. 7840/11143 cut-off events. For 35098/35098 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 56499 event pairs, 3243 based on Foata normal form. 642/11785 useless extension candidates. Maximal degree in co-relation 40199. Up to 5634 conditions per place. [2024-01-27 15:18:01,101 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 82 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2024-01-27 15:18:01,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 96 transitions, 872 flow [2024-01-27 15:18:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:18:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:18:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-01-27 15:18:01,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29591836734693877 [2024-01-27 15:18:01,102 INFO L175 Difference]: Start difference. First operand has 120 places, 75 transitions, 579 flow. Second operand 7 states and 87 transitions. [2024-01-27 15:18:01,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 96 transitions, 872 flow [2024-01-27 15:18:01,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 96 transitions, 788 flow, removed 40 selfloop flow, removed 14 redundant places. [2024-01-27 15:18:01,216 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 525 flow [2024-01-27 15:18:01,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2024-01-27 15:18:01,216 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 47 predicate places. [2024-01-27 15:18:01,217 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 525 flow [2024-01-27 15:18:01,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 15:18:01,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:18:01,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:18:01,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:18:01,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-27 15:18:01,417 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:18:01,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:18:01,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1750770180, now seen corresponding path program 1 times [2024-01-27 15:18:01,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:18:01,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236668228] [2024-01-27 15:18:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:18:01,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:18:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:18:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:02,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:18:02,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236668228] [2024-01-27 15:18:02,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236668228] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:18:02,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306565641] [2024-01-27 15:18:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:18:02,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:18:02,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:18:02,304 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:18:02,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:18:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:18:02,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:18:02,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:18:02,741 INFO L349 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2024-01-27 15:18:02,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 36 [2024-01-27 15:18:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:02,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:18:27,410 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-27 15:18:27,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-27 15:18:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:27,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306565641] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:18:27,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:18:27,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-01-27 15:18:27,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726251278] [2024-01-27 15:18:27,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:18:27,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:18:27,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:18:27,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:18:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=603, Unknown=6, NotChecked=0, Total=702 [2024-01-27 15:18:27,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:18:27,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 525 flow. Second operand has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 27 states have internal predecessors, (193), 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 15:18:27,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:18:27,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:18:27,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:18:29,761 INFO L124 PetriNetUnfolderBase]: 10655/15184 cut-off events. [2024-01-27 15:18:29,761 INFO L125 PetriNetUnfolderBase]: For 37485/37485 co-relation queries the response was YES. [2024-01-27 15:18:29,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53485 conditions, 15184 events. 10655/15184 cut-off events. For 37485/37485 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 83522 event pairs, 1474 based on Foata normal form. 2/15186 useless extension candidates. Maximal degree in co-relation 53458. Up to 9010 conditions per place. [2024-01-27 15:18:29,827 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 233 selfloop transitions, 33 changer transitions 13/280 dead transitions. [2024-01-27 15:18:29,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 280 transitions, 2293 flow [2024-01-27 15:18:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:18:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:18:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 266 transitions. [2024-01-27 15:18:29,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37254901960784315 [2024-01-27 15:18:29,828 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 525 flow. Second operand 17 states and 266 transitions. [2024-01-27 15:18:29,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 280 transitions, 2293 flow [2024-01-27 15:18:29,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 280 transitions, 2185 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-01-27 15:18:29,881 INFO L231 Difference]: Finished difference. Result has 105 places, 88 transitions, 761 flow [2024-01-27 15:18:29,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=761, PETRI_PLACES=105, PETRI_TRANSITIONS=88} [2024-01-27 15:18:29,881 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 66 predicate places. [2024-01-27 15:18:29,881 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 761 flow [2024-01-27 15:18:29,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 27 states have internal predecessors, (193), 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 15:18:29,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:18:29,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:18:29,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:18:30,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:18:30,082 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:18:30,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:18:30,083 INFO L85 PathProgramCache]: Analyzing trace with hash 491602698, now seen corresponding path program 2 times [2024-01-27 15:18:30,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:18:30,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938191517] [2024-01-27 15:18:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:18:30,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:18:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:18:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:31,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:18:31,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938191517] [2024-01-27 15:18:31,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938191517] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:18:31,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870606137] [2024-01-27 15:18:31,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:18:31,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:18:31,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:18:31,023 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:18:31,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:18:31,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:18:31,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:18:31,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:18:31,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:18:31,452 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:18:31,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-01-27 15:18:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:31,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:18:32,269 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:18:32,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:18:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:32,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870606137] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:18:32,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:18:32,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 25 [2024-01-27 15:18:32,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756696953] [2024-01-27 15:18:32,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:18:32,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:18:32,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:18:32,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:18:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:18:32,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:18:32,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 88 transitions, 761 flow. Second operand has 25 states, 25 states have (on average 7.04) internal successors, (176), 25 states have internal predecessors, (176), 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 15:18:32,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:18:32,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:18:32,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:18:35,168 INFO L124 PetriNetUnfolderBase]: 11061/15810 cut-off events. [2024-01-27 15:18:35,168 INFO L125 PetriNetUnfolderBase]: For 55320/55320 co-relation queries the response was YES. [2024-01-27 15:18:35,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59823 conditions, 15810 events. 11061/15810 cut-off events. For 55320/55320 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 87692 event pairs, 1942 based on Foata normal form. 2/15812 useless extension candidates. Maximal degree in co-relation 59789. Up to 9052 conditions per place. [2024-01-27 15:18:35,245 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 214 selfloop transitions, 39 changer transitions 13/267 dead transitions. [2024-01-27 15:18:35,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 267 transitions, 2287 flow [2024-01-27 15:18:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:18:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:18:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 268 transitions. [2024-01-27 15:18:35,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3753501400560224 [2024-01-27 15:18:35,247 INFO L175 Difference]: Start difference. First operand has 105 places, 88 transitions, 761 flow. Second operand 17 states and 268 transitions. [2024-01-27 15:18:35,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 267 transitions, 2287 flow [2024-01-27 15:18:35,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 267 transitions, 2186 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-01-27 15:18:35,351 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 899 flow [2024-01-27 15:18:35,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=899, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2024-01-27 15:18:35,351 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 77 predicate places. [2024-01-27 15:18:35,351 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 899 flow [2024-01-27 15:18:35,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.04) internal successors, (176), 25 states have internal predecessors, (176), 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 15:18:35,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:18:35,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:18:35,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:18:35,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 15:18:35,552 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:18:35,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:18:35,553 INFO L85 PathProgramCache]: Analyzing trace with hash 964738292, now seen corresponding path program 3 times [2024-01-27 15:18:35,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:18:35,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455398471] [2024-01-27 15:18:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:18:35,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:18:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:18:36,667 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 15:18:36,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:18:36,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455398471] [2024-01-27 15:18:36,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455398471] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:18:36,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311177734] [2024-01-27 15:18:36,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:18:36,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:18:36,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:18:36,672 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:18:36,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:18:36,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:18:36,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:18:36,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:18:36,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:18:37,191 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:18:37,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-01-27 15:18:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:37,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:18:37,967 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:18:37,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:18:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:38,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311177734] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:18:38,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:18:38,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 27 [2024-01-27 15:18:38,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136550476] [2024-01-27 15:18:38,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:18:38,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:18:38,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:18:38,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:18:38,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:18:38,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:18:38,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 899 flow. Second operand has 27 states, 27 states have (on average 6.925925925925926) internal successors, (187), 27 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:18:38,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:18:38,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:18:38,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:18:40,792 INFO L124 PetriNetUnfolderBase]: 10945/15616 cut-off events. [2024-01-27 15:18:40,792 INFO L125 PetriNetUnfolderBase]: For 62121/62121 co-relation queries the response was YES. [2024-01-27 15:18:40,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61278 conditions, 15616 events. 10945/15616 cut-off events. For 62121/62121 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 86340 event pairs, 1794 based on Foata normal form. 2/15618 useless extension candidates. Maximal degree in co-relation 61242. Up to 9052 conditions per place. [2024-01-27 15:18:40,882 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 233 selfloop transitions, 49 changer transitions 13/296 dead transitions. [2024-01-27 15:18:40,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 296 transitions, 2659 flow [2024-01-27 15:18:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:18:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:18:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 289 transitions. [2024-01-27 15:18:40,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36215538847117795 [2024-01-27 15:18:40,883 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 899 flow. Second operand 19 states and 289 transitions. [2024-01-27 15:18:40,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 296 transitions, 2659 flow [2024-01-27 15:18:41,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 296 transitions, 2594 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-01-27 15:18:41,248 INFO L231 Difference]: Finished difference. Result has 123 places, 103 transitions, 1028 flow [2024-01-27 15:18:41,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1028, PETRI_PLACES=123, PETRI_TRANSITIONS=103} [2024-01-27 15:18:41,249 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 84 predicate places. [2024-01-27 15:18:41,249 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 103 transitions, 1028 flow [2024-01-27 15:18:41,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.925925925925926) internal successors, (187), 27 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:18:41,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:18:41,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:18:41,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:18:41,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:18:41,454 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:18:41,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:18:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1441442742, now seen corresponding path program 4 times [2024-01-27 15:18:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:18:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163772562] [2024-01-27 15:18:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:18:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:18:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:18:42,343 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 15:18:42,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:18:42,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163772562] [2024-01-27 15:18:42,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163772562] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:18:42,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203548882] [2024-01-27 15:18:42,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:18:42,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:18:42,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:18:42,344 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:18:42,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:18:42,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:18:42,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:18:42,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:18:42,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:18:42,722 INFO L349 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2024-01-27 15:18:42,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 36 [2024-01-27 15:18:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:42,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:18:43,586 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:18:43,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:18:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:43,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203548882] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:18:43,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:18:43,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 31 [2024-01-27 15:18:43,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724915401] [2024-01-27 15:18:43,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:18:43,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:18:43,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:18:43,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:18:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:18:43,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:18:43,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 103 transitions, 1028 flow. Second operand has 31 states, 31 states have (on average 6.967741935483871) internal successors, (216), 31 states have internal predecessors, (216), 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 15:18:43,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:18:43,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:18:43,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:18:46,563 INFO L124 PetriNetUnfolderBase]: 13331/19186 cut-off events. [2024-01-27 15:18:46,563 INFO L125 PetriNetUnfolderBase]: For 78857/78857 co-relation queries the response was YES. [2024-01-27 15:18:46,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75943 conditions, 19186 events. 13331/19186 cut-off events. For 78857/78857 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 111857 event pairs, 2046 based on Foata normal form. 4/19190 useless extension candidates. Maximal degree in co-relation 75906. Up to 10904 conditions per place. [2024-01-27 15:18:46,712 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 221 selfloop transitions, 50 changer transitions 26/298 dead transitions. [2024-01-27 15:18:46,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 298 transitions, 2748 flow [2024-01-27 15:18:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:18:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:18:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 289 transitions. [2024-01-27 15:18:46,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36215538847117795 [2024-01-27 15:18:46,713 INFO L175 Difference]: Start difference. First operand has 123 places, 103 transitions, 1028 flow. Second operand 19 states and 289 transitions. [2024-01-27 15:18:46,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 298 transitions, 2748 flow [2024-01-27 15:18:46,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 298 transitions, 2603 flow, removed 21 selfloop flow, removed 15 redundant places. [2024-01-27 15:18:46,949 INFO L231 Difference]: Finished difference. Result has 132 places, 114 transitions, 1224 flow [2024-01-27 15:18:46,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1224, PETRI_PLACES=132, PETRI_TRANSITIONS=114} [2024-01-27 15:18:46,949 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 93 predicate places. [2024-01-27 15:18:46,950 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 114 transitions, 1224 flow [2024-01-27 15:18:46,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.967741935483871) internal successors, (216), 31 states have internal predecessors, (216), 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 15:18:46,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:18:46,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:18:46,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:18:47,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:18:47,152 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:18:47,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:18:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1452439290, now seen corresponding path program 5 times [2024-01-27 15:18:47,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:18:47,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816483377] [2024-01-27 15:18:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:18:47,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:18:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:18:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:18:48,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:18:48,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816483377] [2024-01-27 15:18:48,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816483377] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:18:48,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708502062] [2024-01-27 15:18:48,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:18:48,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:18:48,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:18:48,667 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:18:48,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:18:48,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:18:48,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:18:48,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:18:48,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:18:49,245 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:18:49,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-01-27 15:18:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:49,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:18:50,216 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:18:50,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:18:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:50,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708502062] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:18:50,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:18:50,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 10] total 36 [2024-01-27 15:18:50,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745826646] [2024-01-27 15:18:50,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:18:50,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-27 15:18:50,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:18:50,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-27 15:18:50,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2024-01-27 15:18:50,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:18:50,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 114 transitions, 1224 flow. Second operand has 36 states, 36 states have (on average 6.666666666666667) internal successors, (240), 36 states have internal predecessors, (240), 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 15:18:50,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:18:50,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:18:50,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:18:54,275 INFO L124 PetriNetUnfolderBase]: 13099/18802 cut-off events. [2024-01-27 15:18:54,275 INFO L125 PetriNetUnfolderBase]: For 91987/91987 co-relation queries the response was YES. [2024-01-27 15:18:54,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77063 conditions, 18802 events. 13099/18802 cut-off events. For 91987/91987 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 108625 event pairs, 2046 based on Foata normal form. 2/18804 useless extension candidates. Maximal degree in co-relation 77020. Up to 10904 conditions per place. [2024-01-27 15:18:54,422 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 223 selfloop transitions, 53 changer transitions 13/290 dead transitions. [2024-01-27 15:18:54,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 290 transitions, 2832 flow [2024-01-27 15:18:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:18:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:18:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 280 transitions. [2024-01-27 15:18:54,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31746031746031744 [2024-01-27 15:18:54,423 INFO L175 Difference]: Start difference. First operand has 132 places, 114 transitions, 1224 flow. Second operand 21 states and 280 transitions. [2024-01-27 15:18:54,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 290 transitions, 2832 flow [2024-01-27 15:18:54,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 290 transitions, 2750 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-01-27 15:18:54,684 INFO L231 Difference]: Finished difference. Result has 140 places, 118 transitions, 1328 flow [2024-01-27 15:18:54,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1328, PETRI_PLACES=140, PETRI_TRANSITIONS=118} [2024-01-27 15:18:54,685 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 101 predicate places. [2024-01-27 15:18:54,685 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 118 transitions, 1328 flow [2024-01-27 15:18:54,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.666666666666667) internal successors, (240), 36 states have internal predecessors, (240), 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 15:18:54,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:18:54,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:18:54,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-27 15:18:54,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:18:54,886 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:18:54,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:18:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash 269996998, now seen corresponding path program 6 times [2024-01-27 15:18:54,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:18:54,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214029563] [2024-01-27 15:18:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:18:54,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:18:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:18:55,981 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 15:18:55,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:18:55,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214029563] [2024-01-27 15:18:55,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214029563] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:18:55,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872981454] [2024-01-27 15:18:55,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:18:55,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:18:55,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:18:55,982 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:18:55,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:18:56,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:18:56,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:18:56,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:18:56,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:18:56,425 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:18:56,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-01-27 15:18:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:56,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:18:57,294 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:18:57,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:18:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:18:58,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872981454] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:18:58,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:18:58,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 28 [2024-01-27 15:18:58,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824942237] [2024-01-27 15:18:58,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:18:58,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:18:58,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:18:58,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:18:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:18:58,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:18:58,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 118 transitions, 1328 flow. Second operand has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 28 states have internal predecessors, (191), 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 15:18:58,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:18:58,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:18:58,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:01,608 INFO L124 PetriNetUnfolderBase]: 12993/18618 cut-off events. [2024-01-27 15:19:01,608 INFO L125 PetriNetUnfolderBase]: For 97238/97238 co-relation queries the response was YES. [2024-01-27 15:19:01,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78214 conditions, 18618 events. 12993/18618 cut-off events. For 97238/97238 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 107163 event pairs, 2020 based on Foata normal form. 2/18620 useless extension candidates. Maximal degree in co-relation 78170. Up to 10904 conditions per place. [2024-01-27 15:19:01,774 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 227 selfloop transitions, 54 changer transitions 13/295 dead transitions. [2024-01-27 15:19:01,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 295 transitions, 2957 flow [2024-01-27 15:19:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:19:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:19:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 268 transitions. [2024-01-27 15:19:01,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-01-27 15:19:01,775 INFO L175 Difference]: Start difference. First operand has 140 places, 118 transitions, 1328 flow. Second operand 18 states and 268 transitions. [2024-01-27 15:19:01,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 295 transitions, 2957 flow [2024-01-27 15:19:02,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 295 transitions, 2856 flow, removed 4 selfloop flow, removed 17 redundant places. [2024-01-27 15:19:02,252 INFO L231 Difference]: Finished difference. Result has 143 places, 122 transitions, 1424 flow [2024-01-27 15:19:02,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1424, PETRI_PLACES=143, PETRI_TRANSITIONS=122} [2024-01-27 15:19:02,252 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 104 predicate places. [2024-01-27 15:19:02,252 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 122 transitions, 1424 flow [2024-01-27 15:19:02,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 28 states have internal predecessors, (191), 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 15:19:02,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:02,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:02,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-27 15:19:02,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:02,454 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:02,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:02,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1862014764, now seen corresponding path program 7 times [2024-01-27 15:19:02,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:02,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665649113] [2024-01-27 15:19:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:02,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:19:04,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:04,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665649113] [2024-01-27 15:19:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665649113] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:04,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038293839] [2024-01-27 15:19:04,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:19:04,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:04,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:04,087 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:19:04,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:19:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:04,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:19:04,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:04,479 INFO L349 Elim1Store]: treesize reduction 3, result has 91.9 percent of original size [2024-01-27 15:19:04,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 54 [2024-01-27 15:19:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:19:04,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:21,404 INFO L349 Elim1Store]: treesize reduction 28, result has 89.1 percent of original size [2024-01-27 15:19:21,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 263 [2024-01-27 15:19:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:19:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038293839] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:21,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:21,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 32 [2024-01-27 15:19:21,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117069572] [2024-01-27 15:19:21,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:21,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:19:21,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:21,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:19:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=877, Unknown=4, NotChecked=0, Total=992 [2024-01-27 15:19:21,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:19:21,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 122 transitions, 1424 flow. Second operand has 32 states, 32 states have (on average 6.5625) internal successors, (210), 32 states have internal predecessors, (210), 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 15:19:21,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:21,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:19:21,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:38,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:19:42,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:19:46,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:19:51,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:19:55,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:19:59,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:20:15,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:20:19,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:20:24,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:20:28,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:20:44,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:20:48,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:20:52,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:20:56,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:01,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:05,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:09,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:13,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:30,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:34,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:39,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:43,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:47,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:51,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:56,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:22:00,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:22:05,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:22:09,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:22:13,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:22:17,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:22:22,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:22:26,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:22:30,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:22:34,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:22:34,925 INFO L124 PetriNetUnfolderBase]: 23937/34655 cut-off events. [2024-01-27 15:22:34,925 INFO L125 PetriNetUnfolderBase]: For 196789/196789 co-relation queries the response was YES. [2024-01-27 15:22:35,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145234 conditions, 34655 events. 23937/34655 cut-off events. For 196789/196789 co-relation queries the response was YES. Maximal size of possible extension queue 1313. Compared 221712 event pairs, 5892 based on Foata normal form. 2/34657 useless extension candidates. Maximal degree in co-relation 145187. Up to 16055 conditions per place. [2024-01-27 15:22:35,298 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 349 selfloop transitions, 79 changer transitions 28/457 dead transitions. [2024-01-27 15:22:35,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 457 transitions, 5144 flow [2024-01-27 15:22:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:22:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:22:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 374 transitions. [2024-01-27 15:22:35,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3298059964726631 [2024-01-27 15:22:35,301 INFO L175 Difference]: Start difference. First operand has 143 places, 122 transitions, 1424 flow. Second operand 27 states and 374 transitions. [2024-01-27 15:22:35,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 457 transitions, 5144 flow [2024-01-27 15:22:36,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 457 transitions, 4985 flow, removed 23 selfloop flow, removed 14 redundant places. [2024-01-27 15:22:36,331 INFO L231 Difference]: Finished difference. Result has 166 places, 174 transitions, 2363 flow [2024-01-27 15:22:36,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2363, PETRI_PLACES=166, PETRI_TRANSITIONS=174} [2024-01-27 15:22:36,332 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 127 predicate places. [2024-01-27 15:22:36,332 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 174 transitions, 2363 flow [2024-01-27 15:22:36,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5625) internal successors, (210), 32 states have internal predecessors, (210), 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 15:22:36,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:36,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:36,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:36,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:36,533 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:22:36,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:36,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1263866294, now seen corresponding path program 8 times [2024-01-27 15:22:36,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:36,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506809379] [2024-01-27 15:22:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:36,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:37,531 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 15:22:37,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:37,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506809379] [2024-01-27 15:22:37,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506809379] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:37,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496483339] [2024-01-27 15:22:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:22:37,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:37,533 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:37,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:22:37,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:22:37,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:37,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:22:37,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:38,171 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:22:38,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-01-27 15:22:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:22:38,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:38,954 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:22:38,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:22:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:22:39,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496483339] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:39,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:39,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 30 [2024-01-27 15:22:39,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544033128] [2024-01-27 15:22:39,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:22:39,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:39,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:22:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:22:39,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:22:39,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 174 transitions, 2363 flow. Second operand has 30 states, 30 states have (on average 6.8) internal successors, (204), 30 states have internal predecessors, (204), 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 15:22:39,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:39,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:22:39,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:46,515 INFO L124 PetriNetUnfolderBase]: 24605/35679 cut-off events. [2024-01-27 15:22:46,516 INFO L125 PetriNetUnfolderBase]: For 268973/268973 co-relation queries the response was YES. [2024-01-27 15:22:46,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163080 conditions, 35679 events. 24605/35679 cut-off events. For 268973/268973 co-relation queries the response was YES. Maximal size of possible extension queue 1371. Compared 229683 event pairs, 6192 based on Foata normal form. 2/35681 useless extension candidates. Maximal degree in co-relation 163023. Up to 16103 conditions per place. [2024-01-27 15:22:47,182 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 346 selfloop transitions, 118 changer transitions 25/490 dead transitions. [2024-01-27 15:22:47,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 490 transitions, 5810 flow [2024-01-27 15:22:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:22:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:22:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 392 transitions. [2024-01-27 15:22:47,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-01-27 15:22:47,184 INFO L175 Difference]: Start difference. First operand has 166 places, 174 transitions, 2363 flow. Second operand 25 states and 392 transitions. [2024-01-27 15:22:47,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 490 transitions, 5810 flow [2024-01-27 15:22:48,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 490 transitions, 5636 flow, removed 61 selfloop flow, removed 12 redundant places. [2024-01-27 15:22:48,665 INFO L231 Difference]: Finished difference. Result has 185 places, 223 transitions, 3368 flow [2024-01-27 15:22:48,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3368, PETRI_PLACES=185, PETRI_TRANSITIONS=223} [2024-01-27 15:22:48,666 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 146 predicate places. [2024-01-27 15:22:48,666 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 223 transitions, 3368 flow [2024-01-27 15:22:48,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.8) internal successors, (204), 30 states have internal predecessors, (204), 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 15:22:48,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:48,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:48,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:48,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:48,868 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:22:48,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:48,868 INFO L85 PathProgramCache]: Analyzing trace with hash -689542104, now seen corresponding path program 9 times [2024-01-27 15:22:48,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:48,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021284659] [2024-01-27 15:22:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:48,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:22:49,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:49,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021284659] [2024-01-27 15:22:49,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021284659] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:49,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83052903] [2024-01-27 15:22:49,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:22:49,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:49,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:49,879 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:49,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:22:50,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:22:50,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:50,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:22:50,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:50,455 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:22:50,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-01-27 15:22:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:22:50,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:51,305 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:22:51,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:22:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:22:51,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83052903] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:51,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:51,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 29 [2024-01-27 15:22:51,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833663971] [2024-01-27 15:22:51,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:51,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:22:51,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:51,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:22:51,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:22:51,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:22:51,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 223 transitions, 3368 flow. Second operand has 29 states, 29 states have (on average 6.827586206896552) internal successors, (198), 29 states have internal predecessors, (198), 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 15:22:51,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:51,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:22:51,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:00,773 INFO L124 PetriNetUnfolderBase]: 31577/46175 cut-off events. [2024-01-27 15:23:00,773 INFO L125 PetriNetUnfolderBase]: For 424880/424880 co-relation queries the response was YES. [2024-01-27 15:23:01,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218744 conditions, 46175 events. 31577/46175 cut-off events. For 424880/424880 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 312946 event pairs, 8042 based on Foata normal form. 44/46219 useless extension candidates. Maximal degree in co-relation 218679. Up to 16099 conditions per place. [2024-01-27 15:23:01,787 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 441 selfloop transitions, 84 changer transitions 48/574 dead transitions. [2024-01-27 15:23:01,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 574 transitions, 7750 flow [2024-01-27 15:23:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:23:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:23:01,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 358 transitions. [2024-01-27 15:23:01,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40589569160997735 [2024-01-27 15:23:01,789 INFO L175 Difference]: Start difference. First operand has 185 places, 223 transitions, 3368 flow. Second operand 21 states and 358 transitions. [2024-01-27 15:23:01,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 574 transitions, 7750 flow [2024-01-27 15:23:05,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 574 transitions, 7504 flow, removed 63 selfloop flow, removed 14 redundant places. [2024-01-27 15:23:05,031 INFO L231 Difference]: Finished difference. Result has 197 places, 237 transitions, 3647 flow [2024-01-27 15:23:05,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3211, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3647, PETRI_PLACES=197, PETRI_TRANSITIONS=237} [2024-01-27 15:23:05,031 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 158 predicate places. [2024-01-27 15:23:05,031 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 237 transitions, 3647 flow [2024-01-27 15:23:05,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.827586206896552) internal successors, (198), 29 states have internal predecessors, (198), 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 15:23:05,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:05,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:05,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:23:05,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-01-27 15:23:05,236 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:23:05,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:05,237 INFO L85 PathProgramCache]: Analyzing trace with hash 810920842, now seen corresponding path program 10 times [2024-01-27 15:23:05,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:05,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488872018] [2024-01-27 15:23:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:05,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:06,118 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 15:23:06,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:06,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488872018] [2024-01-27 15:23:06,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488872018] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:06,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974213094] [2024-01-27 15:23:06,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:23:06,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:06,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:06,121 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:06,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:23:06,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:23:06,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:06,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:23:06,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:06,637 INFO L349 Elim1Store]: treesize reduction 3, result has 90.9 percent of original size [2024-01-27 15:23:06,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 50 [2024-01-27 15:23:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:23:06,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:07,469 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:23:07,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:23:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:23:07,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974213094] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:07,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:07,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 31 [2024-01-27 15:23:07,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107080079] [2024-01-27 15:23:07,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:07,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:23:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:23:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:23:07,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-27 15:23:07,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 237 transitions, 3647 flow. Second operand has 31 states, 31 states have (on average 6.967741935483871) internal successors, (216), 31 states have internal predecessors, (216), 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 15:23:07,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:07,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-27 15:23:07,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand