./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a 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/parallel-parallel-sum-equiv.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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:44:54,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:44:54,263 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:44:54,267 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:44:54,268 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:44:54,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:44:54,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:44:54,293 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:44:54,294 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:44:54,297 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:44:54,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:44:54,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:44:54,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:44:54,298 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:44:54,299 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:44:54,299 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:44:54,299 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:44:54,299 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:44:54,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:44:54,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:44:54,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:44:54,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:44:54,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:44:54,301 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:44:54,301 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:44:54,301 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:44:54,302 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:44:54,302 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:44:54,302 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:44:54,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:44:54,303 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:44:54,304 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:44:54,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:44:54,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:44:54,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:44:54,304 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:44:54,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:44:54,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:44:54,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:44:54,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:44:54,306 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:44:54,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:44:54,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:44:54,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:44:54,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:44:54,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:44:54,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:44:54,598 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:44:54,598 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:44:54,599 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c [2024-02-19 14:44:55,616 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:44:55,781 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:44:55,782 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c [2024-02-19 14:44:55,787 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fc02e4e6/5d13122231d94f5f8243dbdfbd45a9f2/FLAG77da458e1 [2024-02-19 14:44:55,796 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fc02e4e6/5d13122231d94f5f8243dbdfbd45a9f2 [2024-02-19 14:44:55,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:44:55,799 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:44:55,799 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:44:55,800 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:44:55,803 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:44:55,803 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:44:55" (1/1) ... [2024-02-19 14:44:55,804 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31d1afeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:55, skipping insertion in model container [2024-02-19 14:44:55,804 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:44:55" (1/1) ... [2024-02-19 14:44:55,819 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:44:55,988 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/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2024-02-19 14:44:55,994 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:44:56,007 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:44:56,041 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/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2024-02-19 14:44:56,048 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:44:56,063 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:44:56,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56 WrapperNode [2024-02-19 14:44:56,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:44:56,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:44:56,072 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:44:56,072 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:44:56,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,094 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,128 INFO L138 Inliner]: procedures = 27, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 257 [2024-02-19 14:44:56,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:44:56,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:44:56,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:44:56,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:44:56,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,150 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,175 INFO L175 MemorySlicer]: Split 14 memory accesses to 6 slices as follows [2, 4, 2, 2, 2, 2]. 29 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 1, 1, 1]. [2024-02-19 14:44:56,176 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,176 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,200 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,202 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,203 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,208 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:44:56,209 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:44:56,211 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:44:56,211 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:44:56,212 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (1/1) ... [2024-02-19 14:44:56,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:44:56,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:44:56,236 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) [2024-02-19 14:44:56,244 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 [2024-02-19 14:44:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:44:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:44:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:44:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:44:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:44:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 14:44:56,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-19 14:44:56,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-02-19 14:44:56,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 14:44:56,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 14:44:56,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 14:44:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 14:44:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-19 14:44:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-02-19 14:44:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 14:44:56,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 14:44:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 14:44:56,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 14:44:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-19 14:44:56,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-19 14:44:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-19 14:44:56,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-19 14:44:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:44:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:44:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:44:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 14:44:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-19 14:44:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-02-19 14:44:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-19 14:44:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-19 14:44:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-19 14:44:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:44:56,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:44:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:44:56,288 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:44:56,415 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:44:56,417 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:44:56,745 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:44:56,745 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:44:57,004 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:44:57,004 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-19 14:44:57,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:44:57 BoogieIcfgContainer [2024-02-19 14:44:57,005 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:44:57,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:44:57,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:44:57,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:44:57,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:44:55" (1/3) ... [2024-02-19 14:44:57,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289083e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:44:57, skipping insertion in model container [2024-02-19 14:44:57,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:44:56" (2/3) ... [2024-02-19 14:44:57,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289083e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:44:57, skipping insertion in model container [2024-02-19 14:44:57,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:44:57" (3/3) ... [2024-02-19 14:44:57,013 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2024-02-19 14:44:57,027 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:44:57,027 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 14:44:57,027 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:44:57,100 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2024-02-19 14:44:57,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 59 transitions, 158 flow [2024-02-19 14:44:57,169 INFO L124 PetriNetUnfolderBase]: 9/51 cut-off events. [2024-02-19 14:44:57,169 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-19 14:44:57,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 51 events. 9/51 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 89 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 51. Up to 3 conditions per place. [2024-02-19 14:44:57,172 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 59 transitions, 158 flow [2024-02-19 14:44:57,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 50 transitions, 130 flow [2024-02-19 14:44:57,186 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:44:57,191 INFO L369 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=All, 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;@6811bd39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:44:57,191 INFO L370 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-02-19 14:44:57,214 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:44:57,214 INFO L124 PetriNetUnfolderBase]: 9/49 cut-off events. [2024-02-19 14:44:57,214 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-19 14:44:57,214 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:44:57,215 INFO L234 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] [2024-02-19 14:44:57,215 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:44:57,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:44:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1502066068, now seen corresponding path program 1 times [2024-02-19 14:44:57,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:44:57,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678709516] [2024-02-19 14:44:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:44:57,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:44:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:44:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:44:57,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:44:57,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678709516] [2024-02-19 14:44:57,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678709516] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:44:57,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:44:57,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:44:57,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209333325] [2024-02-19 14:44:57,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:44:57,436 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-19 14:44:57,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:44:57,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-19 14:44:57,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-19 14:44:57,476 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:44:57,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 130 flow. Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 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) [2024-02-19 14:44:57,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:44:57,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:44:57,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:44:58,008 INFO L124 PetriNetUnfolderBase]: 4586/6285 cut-off events. [2024-02-19 14:44:58,008 INFO L125 PetriNetUnfolderBase]: For 395/395 co-relation queries the response was YES. [2024-02-19 14:44:58,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13189 conditions, 6285 events. 4586/6285 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30027 event pairs, 3819 based on Foata normal form. 654/6148 useless extension candidates. Maximal degree in co-relation 13104. Up to 6237 conditions per place. [2024-02-19 14:44:58,042 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 43 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2024-02-19 14:44:58,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 210 flow [2024-02-19 14:44:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-19 14:44:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-19 14:44:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 62 transitions. [2024-02-19 14:44:58,052 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5081967213114754 [2024-02-19 14:44:58,055 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2024-02-19 14:44:58,055 INFO L507 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 210 flow [2024-02-19 14:44:58,055 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 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) [2024-02-19 14:44:58,055 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:44:58,056 INFO L234 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, 1, 1] [2024-02-19 14:44:58,056 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:44:58,056 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:44:58,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:44:58,057 INFO L85 PathProgramCache]: Analyzing trace with hash -276108451, now seen corresponding path program 1 times [2024-02-19 14:44:58,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:44:58,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371562664] [2024-02-19 14:44:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:44:58,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:44:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:44:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:44:58,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:44:58,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371562664] [2024-02-19 14:44:58,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371562664] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:44:58,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:44:58,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:44:58,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731514179] [2024-02-19 14:44:58,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:44:58,263 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:44:58,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:44:58,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:44:58,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:44:58,266 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:44:58,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-02-19 14:44:58,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:44:58,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:44:58,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:44:59,446 INFO L124 PetriNetUnfolderBase]: 12558/17345 cut-off events. [2024-02-19 14:44:59,446 INFO L125 PetriNetUnfolderBase]: For 1454/1626 co-relation queries the response was YES. [2024-02-19 14:44:59,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52987 conditions, 17345 events. 12558/17345 cut-off events. For 1454/1626 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 100723 event pairs, 3777 based on Foata normal form. 1/15125 useless extension candidates. Maximal degree in co-relation 52684. Up to 17006 conditions per place. [2024-02-19 14:44:59,541 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 103 selfloop transitions, 7 changer transitions 1/115 dead transitions. [2024-02-19 14:44:59,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 115 transitions, 752 flow [2024-02-19 14:44:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:44:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:44:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-02-19 14:44:59,546 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5901639344262295 [2024-02-19 14:44:59,546 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2024-02-19 14:44:59,547 INFO L507 AbstractCegarLoop]: Abstraction has has 58 places, 115 transitions, 752 flow [2024-02-19 14:44:59,549 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-02-19 14:44:59,549 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:44:59,550 INFO L234 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, 1, 1] [2024-02-19 14:44:59,550 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 14:44:59,550 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:44:59,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:44:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1728286807, now seen corresponding path program 2 times [2024-02-19 14:44:59,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:44:59,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449841900] [2024-02-19 14:44:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:44:59,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:44:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:44:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:44:59,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:44:59,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449841900] [2024-02-19 14:44:59,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449841900] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:44:59,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:44:59,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:44:59,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144076430] [2024-02-19 14:44:59,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:44:59,681 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:44:59,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:44:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:44:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:44:59,682 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:44:59,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 115 transitions, 752 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-02-19 14:44:59,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:44:59,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:44:59,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:45:01,546 INFO L124 PetriNetUnfolderBase]: 19518/27027 cut-off events. [2024-02-19 14:45:01,547 INFO L125 PetriNetUnfolderBase]: For 3735/4119 co-relation queries the response was YES. [2024-02-19 14:45:01,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108498 conditions, 27027 events. 19518/27027 cut-off events. For 3735/4119 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 164022 event pairs, 5037 based on Foata normal form. 17/23575 useless extension candidates. Maximal degree in co-relation 107884. Up to 26393 conditions per place. [2024-02-19 14:45:01,677 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 168 selfloop transitions, 8 changer transitions 2/182 dead transitions. [2024-02-19 14:45:01,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 182 transitions, 1555 flow [2024-02-19 14:45:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:45:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:45:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-02-19 14:45:01,679 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5942622950819673 [2024-02-19 14:45:01,680 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-02-19 14:45:01,680 INFO L507 AbstractCegarLoop]: Abstraction has has 61 places, 182 transitions, 1555 flow [2024-02-19 14:45:01,680 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-02-19 14:45:01,680 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:45:01,680 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:45:01,681 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 14:45:01,681 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:45:01,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:45:01,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1617357046, now seen corresponding path program 1 times [2024-02-19 14:45:01,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:45:01,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030417939] [2024-02-19 14:45:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:01,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:45:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:45:01,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:45:01,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030417939] [2024-02-19 14:45:01,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030417939] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:45:01,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:45:01,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:45:01,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086017867] [2024-02-19 14:45:01,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:45:01,788 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:45:01,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:45:01,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:45:01,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:45:01,788 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:45:01,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 182 transitions, 1555 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:01,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:45:01,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:45:01,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:45:04,642 INFO L124 PetriNetUnfolderBase]: 29729/41551 cut-off events. [2024-02-19 14:45:04,642 INFO L125 PetriNetUnfolderBase]: For 9982/10856 co-relation queries the response was YES. [2024-02-19 14:45:04,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207077 conditions, 41551 events. 29729/41551 cut-off events. For 9982/10856 co-relation queries the response was YES. Maximal size of possible extension queue 1660. Compared 272852 event pairs, 6804 based on Foata normal form. 650/36797 useless extension candidates. Maximal degree in co-relation 134106. Up to 40444 conditions per place. [2024-02-19 14:45:04,914 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 306 selfloop transitions, 5 changer transitions 22/337 dead transitions. [2024-02-19 14:45:04,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 337 transitions, 3578 flow [2024-02-19 14:45:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:45:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:45:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-02-19 14:45:04,917 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.49836065573770494 [2024-02-19 14:45:04,919 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-02-19 14:45:04,919 INFO L507 AbstractCegarLoop]: Abstraction has has 65 places, 337 transitions, 3578 flow [2024-02-19 14:45:04,919 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:04,920 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:45:04,920 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:45:04,920 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-19 14:45:04,920 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:45:04,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:45:04,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1113809578, now seen corresponding path program 1 times [2024-02-19 14:45:04,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:45:04,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673937301] [2024-02-19 14:45:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:04,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:45:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:45:05,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:45:05,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673937301] [2024-02-19 14:45:05,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673937301] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:45:05,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:45:05,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:45:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661108060] [2024-02-19 14:45:05,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:45:05,044 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:45:05,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:45:05,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:45:05,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:45:05,046 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:45:05,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 337 transitions, 3578 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:05,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:45:05,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:45:05,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:45:07,545 INFO L124 PetriNetUnfolderBase]: 23715/33264 cut-off events. [2024-02-19 14:45:07,545 INFO L125 PetriNetUnfolderBase]: For 10984/11360 co-relation queries the response was YES. [2024-02-19 14:45:07,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198399 conditions, 33264 events. 23715/33264 cut-off events. For 10984/11360 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 212839 event pairs, 6048 based on Foata normal form. 576/29394 useless extension candidates. Maximal degree in co-relation 160388. Up to 32420 conditions per place. [2024-02-19 14:45:07,949 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 175 selfloop transitions, 2 changer transitions 96/277 dead transitions. [2024-02-19 14:45:07,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 277 transitions, 3485 flow [2024-02-19 14:45:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:45:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:45:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-02-19 14:45:07,954 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.419672131147541 [2024-02-19 14:45:07,956 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-02-19 14:45:07,956 INFO L507 AbstractCegarLoop]: Abstraction has has 69 places, 277 transitions, 3485 flow [2024-02-19 14:45:07,956 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:07,957 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:45:07,957 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:45:07,957 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 14:45:07,957 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:45:07,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:45:07,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1687970908, now seen corresponding path program 1 times [2024-02-19 14:45:07,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:45:07,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935223204] [2024-02-19 14:45:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:07,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:45:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:45:08,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:45:08,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935223204] [2024-02-19 14:45:08,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935223204] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:45:08,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382945346] [2024-02-19 14:45:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:08,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:08,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:45:08,113 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) [2024-02-19 14:45:08,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:45:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:08,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-19 14:45:08,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:45:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:45:08,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:45:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:45:08,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382945346] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:45:08,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:45:08,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-19 14:45:08,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369297856] [2024-02-19 14:45:08,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:45:08,372 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 14:45:08,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:45:08,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 14:45:08,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-02-19 14:45:08,376 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:45:08,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 277 transitions, 3485 flow. Second operand has 12 states, 12 states have (on average 11.916666666666666) internal successors, (143), 12 states have internal predecessors, (143), 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) [2024-02-19 14:45:08,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:45:08,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:45:08,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:45:12,265 INFO L124 PetriNetUnfolderBase]: 33926/47756 cut-off events. [2024-02-19 14:45:12,265 INFO L125 PetriNetUnfolderBase]: For 24296/25980 co-relation queries the response was YES. [2024-02-19 14:45:12,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331075 conditions, 47756 events. 33926/47756 cut-off events. For 24296/25980 co-relation queries the response was YES. Maximal size of possible extension queue 1912. Compared 324285 event pairs, 6375 based on Foata normal form. 662/42021 useless extension candidates. Maximal degree in co-relation 186578. Up to 46471 conditions per place. [2024-02-19 14:45:12,730 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 421 selfloop transitions, 11 changer transitions 126/562 dead transitions. [2024-02-19 14:45:12,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 562 transitions, 8237 flow [2024-02-19 14:45:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-19 14:45:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-19 14:45:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-02-19 14:45:12,731 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4637002341920375 [2024-02-19 14:45:12,732 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-02-19 14:45:12,732 INFO L507 AbstractCegarLoop]: Abstraction has has 75 places, 562 transitions, 8237 flow [2024-02-19 14:45:12,732 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.916666666666666) internal successors, (143), 12 states have internal predecessors, (143), 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) [2024-02-19 14:45:12,732 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:45:12,732 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:45:12,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-19 14:45:12,942 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-19 14:45:12,944 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:45:12,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:45:12,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1433953746, now seen corresponding path program 1 times [2024-02-19 14:45:12,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:45:12,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890994699] [2024-02-19 14:45:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:12,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:45:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:45:13,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:45:13,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890994699] [2024-02-19 14:45:13,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890994699] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:45:13,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073844403] [2024-02-19 14:45:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:13,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:13,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:45:13,049 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) [2024-02-19 14:45:13,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:45:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:13,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-19 14:45:13,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:45:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:45:13,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:45:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:45:13,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073844403] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:45:13,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:45:13,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-19 14:45:13,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707674439] [2024-02-19 14:45:13,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:45:13,253 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 14:45:13,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:45:13,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 14:45:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-02-19 14:45:13,254 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:45:13,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 562 transitions, 8237 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 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) [2024-02-19 14:45:13,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:45:13,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:45:13,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:45:17,246 INFO L124 PetriNetUnfolderBase]: 27232/38499 cut-off events. [2024-02-19 14:45:17,247 INFO L125 PetriNetUnfolderBase]: For 19206/20198 co-relation queries the response was YES. [2024-02-19 14:45:17,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306646 conditions, 38499 events. 27232/38499 cut-off events. For 19206/20198 co-relation queries the response was YES. Maximal size of possible extension queue 1561. Compared 254859 event pairs, 3933 based on Foata normal form. 1256/34288 useless extension candidates. Maximal degree in co-relation 207134. Up to 37767 conditions per place. [2024-02-19 14:45:17,468 INFO L140 encePairwiseOnDemand]: 53/61 looper letters, 399 selfloop transitions, 23 changer transitions 232/658 dead transitions. [2024-02-19 14:45:17,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 658 transitions, 10886 flow [2024-02-19 14:45:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-19 14:45:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-19 14:45:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-02-19 14:45:17,470 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3957845433255269 [2024-02-19 14:45:17,471 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 27 predicate places. [2024-02-19 14:45:17,471 INFO L507 AbstractCegarLoop]: Abstraction has has 81 places, 658 transitions, 10886 flow [2024-02-19 14:45:17,471 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 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) [2024-02-19 14:45:17,471 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:45:17,471 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:45:17,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 14:45:17,682 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-02-19 14:45:17,682 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:45:17,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:45:17,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2091670602, now seen corresponding path program 2 times [2024-02-19 14:45:17,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:45:17,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94325764] [2024-02-19 14:45:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:17,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:45:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:45:17,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:45:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94325764] [2024-02-19 14:45:17,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94325764] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:45:17,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878034408] [2024-02-19 14:45:17,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:45:17,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:17,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:45:17,807 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) [2024-02-19 14:45:17,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:45:17,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:45:17,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:45:17,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-19 14:45:17,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:45:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:45:17,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:45:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:45:18,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878034408] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-19 14:45:18,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-19 14:45:18,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-02-19 14:45:18,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816341474] [2024-02-19 14:45:18,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:45:18,038 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-19 14:45:18,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:45:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-19 14:45:18,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-02-19 14:45:18,039 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:45:18,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 658 transitions, 10886 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:18,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:45:18,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:45:18,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:45:21,665 INFO L124 PetriNetUnfolderBase]: 22042/31314 cut-off events. [2024-02-19 14:45:21,665 INFO L125 PetriNetUnfolderBase]: For 23448/24784 co-relation queries the response was YES. [2024-02-19 14:45:21,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279254 conditions, 31314 events. 22042/31314 cut-off events. For 23448/24784 co-relation queries the response was YES. Maximal size of possible extension queue 1238. Compared 203324 event pairs, 3265 based on Foata normal form. 562/27343 useless extension candidates. Maximal degree in co-relation 168290. Up to 30615 conditions per place. [2024-02-19 14:45:22,051 INFO L140 encePairwiseOnDemand]: 53/61 looper letters, 438 selfloop transitions, 19 changer transitions 196/657 dead transitions. [2024-02-19 14:45:22,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 657 transitions, 12116 flow [2024-02-19 14:45:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:45:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:45:22,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-02-19 14:45:22,054 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.40710382513661203 [2024-02-19 14:45:22,054 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2024-02-19 14:45:22,054 INFO L507 AbstractCegarLoop]: Abstraction has has 86 places, 657 transitions, 12116 flow [2024-02-19 14:45:22,054 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:22,055 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:45:22,055 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:45:22,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-19 14:45:22,258 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:22,259 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:45:22,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:45:22,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1008139942, now seen corresponding path program 2 times [2024-02-19 14:45:22,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:45:22,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633632446] [2024-02-19 14:45:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:22,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:45:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:45:22,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:45:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633632446] [2024-02-19 14:45:22,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633632446] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:45:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674828685] [2024-02-19 14:45:22,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:45:22,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:45:22,382 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) [2024-02-19 14:45:22,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:45:22,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:45:22,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:45:22,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-19 14:45:22,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:45:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:45:22,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:45:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:45:22,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674828685] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-19 14:45:22,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-19 14:45:22,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-02-19 14:45:22,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863730071] [2024-02-19 14:45:22,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:45:22,599 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-19 14:45:22,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:45:22,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-19 14:45:22,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-02-19 14:45:22,599 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:45:22,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 657 transitions, 12116 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:22,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:45:22,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:45:22,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:45:25,598 INFO L124 PetriNetUnfolderBase]: 19730/28171 cut-off events. [2024-02-19 14:45:25,598 INFO L125 PetriNetUnfolderBase]: For 29361/30914 co-relation queries the response was YES. [2024-02-19 14:45:25,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278317 conditions, 28171 events. 19730/28171 cut-off events. For 29361/30914 co-relation queries the response was YES. Maximal size of possible extension queue 1119. Compared 182567 event pairs, 3193 based on Foata normal form. 443/24373 useless extension candidates. Maximal degree in co-relation 155342. Up to 27481 conditions per place. [2024-02-19 14:45:25,835 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 415 selfloop transitions, 16 changer transitions 204/639 dead transitions. [2024-02-19 14:45:25,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 639 transitions, 13059 flow [2024-02-19 14:45:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:45:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:45:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-02-19 14:45:25,836 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4371584699453552 [2024-02-19 14:45:25,837 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-02-19 14:45:25,837 INFO L507 AbstractCegarLoop]: Abstraction has has 91 places, 639 transitions, 13059 flow [2024-02-19 14:45:25,837 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:45:25,837 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:45:25,838 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:45:25,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-19 14:45:26,044 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:26,044 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:45:26,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:45:26,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1270160089, now seen corresponding path program 1 times [2024-02-19 14:45:26,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:45:26,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954488000] [2024-02-19 14:45:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:26,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:45:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 14:45:26,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:45:26,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954488000] [2024-02-19 14:45:26,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954488000] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:45:26,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993238108] [2024-02-19 14:45:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:26,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:26,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:45:26,451 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) [2024-02-19 14:45:26,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 14:45:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:26,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-19 14:45:26,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:45:26,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-02-19 14:45:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 14:45:26,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:45:26,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:45:26,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2024-02-19 14:45:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 14:45:26,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993238108] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:45:26,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:45:26,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2024-02-19 14:45:26,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789156732] [2024-02-19 14:45:26,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:45:26,784 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-19 14:45:26,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:45:26,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-19 14:45:26,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-02-19 14:45:26,785 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:45:26,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 639 transitions, 13059 flow. Second operand has 17 states, 17 states have (on average 11.823529411764707) internal successors, (201), 17 states have internal predecessors, (201), 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) [2024-02-19 14:45:26,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:45:26,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:45:26,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:45:33,233 INFO L124 PetriNetUnfolderBase]: 32344/45591 cut-off events. [2024-02-19 14:45:33,233 INFO L125 PetriNetUnfolderBase]: For 47923/48676 co-relation queries the response was YES. [2024-02-19 14:45:33,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496071 conditions, 45591 events. 32344/45591 cut-off events. For 47923/48676 co-relation queries the response was YES. Maximal size of possible extension queue 1493. Compared 302864 event pairs, 3513 based on Foata normal form. 57/39021 useless extension candidates. Maximal degree in co-relation 360010. Up to 44628 conditions per place. [2024-02-19 14:45:33,714 INFO L140 encePairwiseOnDemand]: 50/61 looper letters, 925 selfloop transitions, 128 changer transitions 260/1317 dead transitions. [2024-02-19 14:45:33,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 1317 transitions, 29524 flow [2024-02-19 14:45:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-19 14:45:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-19 14:45:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 534 transitions. [2024-02-19 14:45:33,716 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.46074201898188094 [2024-02-19 14:45:33,717 INFO L308 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2024-02-19 14:45:33,717 INFO L507 AbstractCegarLoop]: Abstraction has has 109 places, 1317 transitions, 29524 flow [2024-02-19 14:45:33,717 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.823529411764707) internal successors, (201), 17 states have internal predecessors, (201), 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) [2024-02-19 14:45:33,717 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:45:33,717 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:45:33,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 14:45:33,922 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-19 14:45:33,922 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:45:33,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:45:33,923 INFO L85 PathProgramCache]: Analyzing trace with hash -900823783, now seen corresponding path program 2 times [2024-02-19 14:45:33,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:45:33,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014869070] [2024-02-19 14:45:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:45:33,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:45:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:45:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:45:34,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:45:34,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014869070] [2024-02-19 14:45:34,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014869070] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:45:34,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007214913] [2024-02-19 14:45:34,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:45:34,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:45:34,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:45:34,564 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) [2024-02-19 14:45:34,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 14:45:34,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:45:34,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:45:34,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-19 14:45:34,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:45:34,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-02-19 14:45:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:45:34,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:45:34,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-19 14:45:34,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2024-02-19 14:45:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-19 14:45:34,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007214913] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:45:34,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:45:34,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 20 [2024-02-19 14:45:34,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936560023] [2024-02-19 14:45:34,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:45:34,908 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-19 14:45:34,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:45:34,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-19 14:45:34,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-02-19 14:45:34,909 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-02-19 14:45:34,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 1317 transitions, 29524 flow. Second operand has 20 states, 20 states have (on average 11.75) internal successors, (235), 20 states have internal predecessors, (235), 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) [2024-02-19 14:45:34,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:45:34,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-02-19 14:45:34,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand