./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/bench-exp2x9.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 af523f24b0126267447f5590b01302c6de6f439c37a01df1dbf66192a849a6d6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:14:46,046 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:14:46,101 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:14:46,106 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:14:46,106 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:14:46,132 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:14:46,133 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:14:46,133 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:14:46,134 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:14:46,137 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:14:46,137 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:14:46,137 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:14:46,138 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:14:46,139 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:14:46,139 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:14:46,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:14:46,139 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:14:46,139 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:14:46,140 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:14:46,140 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:14:46,141 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:14:46,141 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:14:46,141 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:14:46,141 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:14:46,142 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:14:46,142 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:14:46,142 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:14:46,142 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:14:46,143 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:14:46,143 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:14:46,144 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:14:46,144 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:14:46,144 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:14:46,144 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:14:46,144 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:14:46,144 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:14:46,145 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:14:46,145 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:14:46,145 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:14:46,145 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:14:46,145 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:14:46,145 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:14:46,146 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:14:46,146 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af523f24b0126267447f5590b01302c6de6f439c37a01df1dbf66192a849a6d6 [2024-01-27 15:14:46,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:14:46,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:14:46,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:14:46,338 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:14:46,338 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:14:46,339 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c [2024-01-27 15:14:47,304 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:14:47,461 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:14:47,462 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c [2024-01-27 15:14:47,473 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f65e34ef9/3c0cebd81e284347b47c88a0b4f6e999/FLAG75c917524 [2024-01-27 15:14:47,486 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f65e34ef9/3c0cebd81e284347b47c88a0b4f6e999 [2024-01-27 15:14:47,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:14:47,489 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:14:47,490 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:14:47,491 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:14:47,494 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:14:47,495 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1241a03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47, skipping insertion in model container [2024-01-27 15:14:47,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,519 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:14:47,663 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/bench-exp2x9.wvr.c[2721,2734] [2024-01-27 15:14:47,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:14:47,672 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:14:47,687 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/bench-exp2x9.wvr.c[2721,2734] [2024-01-27 15:14:47,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:14:47,698 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:14:47,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47 WrapperNode [2024-01-27 15:14:47,698 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:14:47,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:14:47,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:14:47,699 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:14:47,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,723 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2024-01-27 15:14:47,723 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:14:47,723 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:14:47,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:14:47,724 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:14:47,731 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,733 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,743 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-27 15:14:47,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,748 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,754 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:14:47,754 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:14:47,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:14:47,755 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:14:47,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (1/1) ... [2024-01-27 15:14:47,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:14:47,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:47,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:14:47,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:14:47,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:14:47,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:14:47,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:14:47,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:14:47,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:14:47,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:14:47,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:14:47,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-01-27 15:14:47,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-01-27 15:14:47,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:14:47,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:14:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:14:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:14:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:14:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:14:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:14:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:14:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:14:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:14:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:14:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:14:47,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:14:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:14:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:14:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:14:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:14:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:14:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:14:47,833 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:14:47,915 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:14:47,917 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:14:48,097 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:14:48,097 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:14:48,241 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:14:48,241 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:14:48,241 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:14:48 BoogieIcfgContainer [2024-01-27 15:14:48,242 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:14:48,243 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:14:48,243 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:14:48,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:14:48,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:14:47" (1/3) ... [2024-01-27 15:14:48,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5508ea58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:14:48, skipping insertion in model container [2024-01-27 15:14:48,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:47" (2/3) ... [2024-01-27 15:14:48,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5508ea58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:14:48, skipping insertion in model container [2024-01-27 15:14:48,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:14:48" (3/3) ... [2024-01-27 15:14:48,256 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2024-01-27 15:14:48,262 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:14:48,269 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:14:48,269 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:14:48,269 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:14:48,301 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 15:14:48,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 35 transitions, 98 flow [2024-01-27 15:14:48,369 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2024-01-27 15:14:48,369 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:14:48,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 31 events. 4/31 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-01-27 15:14:48,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 35 transitions, 98 flow [2024-01-27 15:14:48,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 30 transitions, 84 flow [2024-01-27 15:14:48,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:14:48,393 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@42a39caf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:14:48,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:14:48,402 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:14:48,403 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2024-01-27 15:14:48,403 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:14:48,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:48,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:48,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:48,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1839673379, now seen corresponding path program 1 times [2024-01-27 15:14:48,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:48,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878514640] [2024-01-27 15:14:48,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:48,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:48,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:48,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878514640] [2024-01-27 15:14:48,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878514640] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:48,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:48,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:14:48,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489392107] [2024-01-27 15:14:48,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:48,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:14:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:48,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:14:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:14:48,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:48,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:48,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:48,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:48,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:49,207 INFO L124 PetriNetUnfolderBase]: 1537/1955 cut-off events. [2024-01-27 15:14:49,207 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-01-27 15:14:49,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 1955 events. 1537/1955 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6359 event pairs, 141 based on Foata normal form. 1/1131 useless extension candidates. Maximal degree in co-relation 3091. Up to 1733 conditions per place. [2024-01-27 15:14:49,223 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 41 selfloop transitions, 5 changer transitions 1/52 dead transitions. [2024-01-27 15:14:49,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 243 flow [2024-01-27 15:14:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:14:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:14:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-01-27 15:14:49,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-01-27 15:14:49,233 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 84 flow. Second operand 3 states and 75 transitions. [2024-01-27 15:14:49,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 243 flow [2024-01-27 15:14:49,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 52 transitions, 213 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-27 15:14:49,240 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 101 flow [2024-01-27 15:14:49,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2024-01-27 15:14:49,244 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2024-01-27 15:14:49,245 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 101 flow [2024-01-27 15:14:49,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:49,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:49,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:49,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:14:49,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:49,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash 425209788, now seen corresponding path program 1 times [2024-01-27 15:14:49,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:49,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501645938] [2024-01-27 15:14:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:49,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:49,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:49,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501645938] [2024-01-27 15:14:49,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501645938] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:49,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:49,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:49,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230514779] [2024-01-27 15:14:49,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:49,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:49,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:49,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:49,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:49,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:49,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:49,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:49,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:49,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:49,673 INFO L124 PetriNetUnfolderBase]: 1837/2362 cut-off events. [2024-01-27 15:14:49,673 INFO L125 PetriNetUnfolderBase]: For 571/571 co-relation queries the response was YES. [2024-01-27 15:14:49,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 2362 events. 1837/2362 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8335 event pairs, 138 based on Foata normal form. 34/2386 useless extension candidates. Maximal degree in co-relation 1437. Up to 964 conditions per place. [2024-01-27 15:14:49,686 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 72 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-01-27 15:14:49,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 87 transitions, 415 flow [2024-01-27 15:14:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-01-27 15:14:49,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6914285714285714 [2024-01-27 15:14:49,691 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 101 flow. Second operand 5 states and 121 transitions. [2024-01-27 15:14:49,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 87 transitions, 415 flow [2024-01-27 15:14:49,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 87 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:49,696 INFO L231 Difference]: Finished difference. Result has 39 places, 41 transitions, 161 flow [2024-01-27 15:14:49,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=39, PETRI_TRANSITIONS=41} [2024-01-27 15:14:49,697 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-01-27 15:14:49,697 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 41 transitions, 161 flow [2024-01-27 15:14:49,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:49,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:49,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:49,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:14:49,698 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:49,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:49,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1628550713, now seen corresponding path program 1 times [2024-01-27 15:14:49,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:49,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6611466] [2024-01-27 15:14:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:49,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:49,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:49,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6611466] [2024-01-27 15:14:49,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6611466] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:49,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:49,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9304742] [2024-01-27 15:14:49,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:49,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:49,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:49,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:49,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:49,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:49,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:49,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:49,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:49,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:50,033 INFO L124 PetriNetUnfolderBase]: 1779/2304 cut-off events. [2024-01-27 15:14:50,034 INFO L125 PetriNetUnfolderBase]: For 2031/2031 co-relation queries the response was YES. [2024-01-27 15:14:50,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6819 conditions, 2304 events. 1779/2304 cut-off events. For 2031/2031 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8326 event pairs, 118 based on Foata normal form. 58/2352 useless extension candidates. Maximal degree in co-relation 3195. Up to 906 conditions per place. [2024-01-27 15:14:50,046 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 72 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-01-27 15:14:50,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 85 transitions, 440 flow [2024-01-27 15:14:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-01-27 15:14:50,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-01-27 15:14:50,049 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 161 flow. Second operand 5 states and 120 transitions. [2024-01-27 15:14:50,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 85 transitions, 440 flow [2024-01-27 15:14:50,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 85 transitions, 440 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:14:50,053 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 175 flow [2024-01-27 15:14:50,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-01-27 15:14:50,055 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2024-01-27 15:14:50,055 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 175 flow [2024-01-27 15:14:50,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:50,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:50,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:50,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:14:50,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:50,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:50,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1343722216, now seen corresponding path program 2 times [2024-01-27 15:14:50,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:50,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895768036] [2024-01-27 15:14:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:50,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:50,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895768036] [2024-01-27 15:14:50,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895768036] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64650640] [2024-01-27 15:14:50,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:14:50,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:50,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:50,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:14:50,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:14:50,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:50,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:50,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:14:50,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:50,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:50,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64650640] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:50,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:50,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-01-27 15:14:50,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804365718] [2024-01-27 15:14:50,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:50,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:14:50,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:14:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:14:50,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:50,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:50,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:50,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:50,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:50,679 INFO L124 PetriNetUnfolderBase]: 1687/2222 cut-off events. [2024-01-27 15:14:50,679 INFO L125 PetriNetUnfolderBase]: For 2865/2865 co-relation queries the response was YES. [2024-01-27 15:14:50,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6939 conditions, 2222 events. 1687/2222 cut-off events. For 2865/2865 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8408 event pairs, 431 based on Foata normal form. 70/2258 useless extension candidates. Maximal degree in co-relation 2937. Up to 1155 conditions per place. [2024-01-27 15:14:50,691 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 72 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-01-27 15:14:50,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 85 transitions, 472 flow [2024-01-27 15:14:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-01-27 15:14:50,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6914285714285714 [2024-01-27 15:14:50,693 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 175 flow. Second operand 5 states and 121 transitions. [2024-01-27 15:14:50,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 85 transitions, 472 flow [2024-01-27 15:14:50,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 85 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:50,697 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 218 flow [2024-01-27 15:14:50,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-01-27 15:14:50,698 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2024-01-27 15:14:50,698 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 218 flow [2024-01-27 15:14:50,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:50,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:50,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:50,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:50,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:50,911 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:50,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1509948660, now seen corresponding path program 1 times [2024-01-27 15:14:50,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:50,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885540171] [2024-01-27 15:14:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:50,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:50,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:50,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885540171] [2024-01-27 15:14:50,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885540171] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:50,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328245937] [2024-01-27 15:14:50,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:50,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:50,985 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:14:50,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:14:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:51,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:14:51,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:51,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:51,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328245937] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:51,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:51,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-01-27 15:14:51,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244339110] [2024-01-27 15:14:51,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:51,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:14:51,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:51,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:14:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:14:51,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:51,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:51,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:51,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:51,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:51,466 INFO L124 PetriNetUnfolderBase]: 2045/2782 cut-off events. [2024-01-27 15:14:51,467 INFO L125 PetriNetUnfolderBase]: For 6812/6812 co-relation queries the response was YES. [2024-01-27 15:14:51,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9829 conditions, 2782 events. 2045/2782 cut-off events. For 6812/6812 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11712 event pairs, 323 based on Foata normal form. 80/2808 useless extension candidates. Maximal degree in co-relation 5943. Up to 1205 conditions per place. [2024-01-27 15:14:51,485 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 102 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2024-01-27 15:14:51,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 115 transitions, 847 flow [2024-01-27 15:14:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-01-27 15:14:51,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-01-27 15:14:51,486 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 218 flow. Second operand 5 states and 119 transitions. [2024-01-27 15:14:51,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 115 transitions, 847 flow [2024-01-27 15:14:51,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 115 transitions, 822 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:51,493 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 264 flow [2024-01-27 15:14:51,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-01-27 15:14:51,495 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 16 predicate places. [2024-01-27 15:14:51,495 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 264 flow [2024-01-27 15:14:51,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:51,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:51,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:51,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:51,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:51,704 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:51,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1431904144, now seen corresponding path program 2 times [2024-01-27 15:14:51,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:51,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543442950] [2024-01-27 15:14:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:51,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:51,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:51,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543442950] [2024-01-27 15:14:51,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543442950] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:51,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:51,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070211381] [2024-01-27 15:14:51,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:51,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:51,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:51,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:51,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:51,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:51,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:51,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:51,969 INFO L124 PetriNetUnfolderBase]: 1843/2482 cut-off events. [2024-01-27 15:14:51,969 INFO L125 PetriNetUnfolderBase]: For 6653/6653 co-relation queries the response was YES. [2024-01-27 15:14:51,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10209 conditions, 2482 events. 1843/2482 cut-off events. For 6653/6653 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9653 event pairs, 99 based on Foata normal form. 38/2490 useless extension candidates. Maximal degree in co-relation 6291. Up to 1018 conditions per place. [2024-01-27 15:14:51,984 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 102 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-01-27 15:14:51,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 118 transitions, 896 flow [2024-01-27 15:14:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-01-27 15:14:51,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6685714285714286 [2024-01-27 15:14:51,985 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 264 flow. Second operand 5 states and 117 transitions. [2024-01-27 15:14:51,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 118 transitions, 896 flow [2024-01-27 15:14:51,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 118 transitions, 896 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:14:51,992 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 325 flow [2024-01-27 15:14:51,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-01-27 15:14:51,993 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 21 predicate places. [2024-01-27 15:14:51,993 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 325 flow [2024-01-27 15:14:51,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:51,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:51,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:51,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:14:51,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:51,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:51,994 INFO L85 PathProgramCache]: Analyzing trace with hash -368550829, now seen corresponding path program 1 times [2024-01-27 15:14:51,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:51,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314880606] [2024-01-27 15:14:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:51,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:52,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:52,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314880606] [2024-01-27 15:14:52,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314880606] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:52,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:52,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:52,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856314443] [2024-01-27 15:14:52,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:52,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:52,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:52,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:52,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:52,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:52,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 325 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:52,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:52,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:52,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:52,263 INFO L124 PetriNetUnfolderBase]: 1801/2440 cut-off events. [2024-01-27 15:14:52,263 INFO L125 PetriNetUnfolderBase]: For 7675/7675 co-relation queries the response was YES. [2024-01-27 15:14:52,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10814 conditions, 2440 events. 1801/2440 cut-off events. For 7675/7675 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9662 event pairs, 75 based on Foata normal form. 42/2452 useless extension candidates. Maximal degree in co-relation 6678. Up to 1137 conditions per place. [2024-01-27 15:14:52,280 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 99 selfloop transitions, 8 changer transitions 4/116 dead transitions. [2024-01-27 15:14:52,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 116 transitions, 909 flow [2024-01-27 15:14:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-01-27 15:14:52,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6628571428571428 [2024-01-27 15:14:52,282 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 325 flow. Second operand 5 states and 116 transitions. [2024-01-27 15:14:52,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 116 transitions, 909 flow [2024-01-27 15:14:52,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 116 transitions, 898 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:52,291 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 328 flow [2024-01-27 15:14:52,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=328, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-01-27 15:14:52,292 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2024-01-27 15:14:52,292 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 328 flow [2024-01-27 15:14:52,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:52,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:52,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:52,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:14:52,293 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:52,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash 90604823, now seen corresponding path program 2 times [2024-01-27 15:14:52,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:52,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249067410] [2024-01-27 15:14:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:52,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249067410] [2024-01-27 15:14:52,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249067410] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:52,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:52,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:52,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930989997] [2024-01-27 15:14:52,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:52,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:52,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:52,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:52,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:52,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:52,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 328 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:52,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:52,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:52,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:52,587 INFO L124 PetriNetUnfolderBase]: 1725/2376 cut-off events. [2024-01-27 15:14:52,587 INFO L125 PetriNetUnfolderBase]: For 8064/8064 co-relation queries the response was YES. [2024-01-27 15:14:52,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10864 conditions, 2376 events. 1725/2376 cut-off events. For 8064/8064 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9876 event pairs, 293 based on Foata normal form. 76/2410 useless extension candidates. Maximal degree in co-relation 6709. Up to 1307 conditions per place. [2024-01-27 15:14:52,600 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 101 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2024-01-27 15:14:52,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 114 transitions, 925 flow [2024-01-27 15:14:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-01-27 15:14:52,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6457142857142857 [2024-01-27 15:14:52,601 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 328 flow. Second operand 5 states and 113 transitions. [2024-01-27 15:14:52,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 114 transitions, 925 flow [2024-01-27 15:14:52,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 912 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:52,608 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 368 flow [2024-01-27 15:14:52,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2024-01-27 15:14:52,609 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 30 predicate places. [2024-01-27 15:14:52,609 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 368 flow [2024-01-27 15:14:52,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:52,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:52,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:52,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:14:52,610 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:52,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1087643345, now seen corresponding path program 2 times [2024-01-27 15:14:52,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:52,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89345271] [2024-01-27 15:14:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:52,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:52,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:52,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89345271] [2024-01-27 15:14:52,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89345271] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:52,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:52,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:52,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792298402] [2024-01-27 15:14:52,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:52,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:52,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:52,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:52,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:52,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-01-27 15:14:52,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 368 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:52,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:52,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-01-27 15:14:52,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:52,893 INFO L124 PetriNetUnfolderBase]: 1657/2291 cut-off events. [2024-01-27 15:14:52,893 INFO L125 PetriNetUnfolderBase]: For 8253/8277 co-relation queries the response was YES. [2024-01-27 15:14:52,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11116 conditions, 2291 events. 1657/2291 cut-off events. For 8253/8277 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9648 event pairs, 481 based on Foata normal form. 72/2345 useless extension candidates. Maximal degree in co-relation 9772. Up to 1331 conditions per place. [2024-01-27 15:14:52,905 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 117 selfloop transitions, 8 changer transitions 0/130 dead transitions. [2024-01-27 15:14:52,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 130 transitions, 1116 flow [2024-01-27 15:14:52,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-01-27 15:14:52,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6685714285714286 [2024-01-27 15:14:52,906 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 368 flow. Second operand 5 states and 117 transitions. [2024-01-27 15:14:52,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 130 transitions, 1116 flow [2024-01-27 15:14:52,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 130 transitions, 1058 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-01-27 15:14:52,923 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 405 flow [2024-01-27 15:14:52,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=405, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-01-27 15:14:52,923 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 34 predicate places. [2024-01-27 15:14:52,923 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 405 flow [2024-01-27 15:14:52,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:52,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:52,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:52,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:14:52,924 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:14:52,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash -124621720, now seen corresponding path program 1 times [2024-01-27 15:14:52,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:52,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485680411] [2024-01-27 15:14:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:52,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:53,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485680411] [2024-01-27 15:14:53,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485680411] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166450379] [2024-01-27 15:14:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:53,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:53,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:53,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:14:53,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process Killed by 15