./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/mult-dist.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/mult-dist.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 16:56:41,318 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:56:41,372 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:56:41,375 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:56:41,376 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:56:41,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:56:41,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:56:41,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:56:41,405 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:56:41,405 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:56:41,405 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:56:41,405 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:56:41,406 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:56:41,406 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:56:41,406 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:56:41,407 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:56:41,407 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:56:41,407 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:56:41,407 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:56:41,407 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:56:41,408 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:56:41,412 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:56:41,412 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:56:41,413 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:56:41,415 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:56:41,416 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:56:41,416 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:56:41,421 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:56:41,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:56:41,422 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:56:41,422 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:56:41,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:56:41,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:56:41,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:56:41,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:56:41,423 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:56:41,423 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:56:41,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:56:41,423 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:56:41,424 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:56:41,424 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:56:41,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:56:41,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:56:41,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:56:41,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:56:41,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:56:41,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:56:41,628 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:56:41,628 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:56:41,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-01-31 16:56:42,589 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:56:42,741 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:56:42,742 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-01-31 16:56:42,747 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a4e1658/43e097cbc8aa44679ba06619d408e0f2/FLAG5648747b1 [2024-01-31 16:56:42,759 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a4e1658/43e097cbc8aa44679ba06619d408e0f2 [2024-01-31 16:56:42,761 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:56:42,761 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:56:42,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/mult-dist.wvr.yml/witness.yml [2024-01-31 16:56:42,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:56:42,857 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:56:42,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:56:42,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:56:42,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:56:42,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:56:42" (1/2) ... [2024-01-31 16:56:42,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@299d6faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:56:42, skipping insertion in model container [2024-01-31 16:56:42,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:56:42" (1/2) ... [2024-01-31 16:56:42,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ae3d5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:56:42, skipping insertion in model container [2024-01-31 16:56:42,867 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:56:42" (2/2) ... [2024-01-31 16:56:42,867 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@299d6faa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:42, skipping insertion in model container [2024-01-31 16:56:42,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:56:42" (2/2) ... [2024-01-31 16:56:42,867 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:56:42,892 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 16:56:42,908 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:56:43,051 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/mult-dist.wvr.c[2155,2168] [2024-01-31 16:56:43,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:56:43,074 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:56:43,100 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/mult-dist.wvr.c[2155,2168] [2024-01-31 16:56:43,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:56:43,115 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:56:43,115 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43 WrapperNode [2024-01-31 16:56:43,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:56:43,116 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:56:43,116 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:56:43,116 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:56:43,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,150 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2024-01-31 16:56:43,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:56:43,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:56:43,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:56:43,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:56:43,160 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,164 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,186 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-31 16:56:43,186 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,189 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,196 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:56:43,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:56:43,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:56:43,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:56:43,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (1/1) ... [2024-01-31 16:56:43,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:56:43,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:43,223 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) [2024-01-31 16:56:43,224 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 [2024-01-31 16:56:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:56:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:56:43,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:56:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:56:43,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:56:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 16:56:43,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 16:56:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:56:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:56:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:56:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:56:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:56:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:56:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:56:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:56:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:56:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:56:43,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:56:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:56:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:56:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:56:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:56:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:56:43,260 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:56:43,344 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:56:43,347 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:56:43,508 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:56:43,508 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:56:43,628 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:56:43,629 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 16:56:43,629 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:56:43 BoogieIcfgContainer [2024-01-31 16:56:43,629 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:56:43,631 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:56:43,631 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:56:43,637 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:56:43,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:56:42" (1/4) ... [2024-01-31 16:56:43,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796cd440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:56:43, skipping insertion in model container [2024-01-31 16:56:43,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:56:42" (2/4) ... [2024-01-31 16:56:43,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796cd440 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:56:43, skipping insertion in model container [2024-01-31 16:56:43,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:56:43" (3/4) ... [2024-01-31 16:56:43,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796cd440 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:56:43, skipping insertion in model container [2024-01-31 16:56:43,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:56:43" (4/4) ... [2024-01-31 16:56:43,640 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2024-01-31 16:56:43,652 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:56:43,652 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 16:56:43,653 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:56:43,713 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-31 16:56:43,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 27 transitions, 75 flow [2024-01-31 16:56:43,762 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-31 16:56:43,762 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:56:43,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 3/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-01-31 16:56:43,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 27 transitions, 75 flow [2024-01-31 16:56:43,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 64 flow [2024-01-31 16:56:43,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:56:43,779 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=false, 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;@8c11a7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:56:43,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 16:56:43,787 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:56:43,787 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-01-31 16:56:43,787 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:56:43,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:43,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:56:43,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:43,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2051590417, now seen corresponding path program 1 times [2024-01-31 16:56:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:43,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515881193] [2024-01-31 16:56:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:43,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:44,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:44,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515881193] [2024-01-31 16:56:44,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515881193] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:56:44,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:56:44,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:56:44,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687529938] [2024-01-31 16:56:44,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:56:44,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:56:44,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:56:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:56:44,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:44,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-01-31 16:56:44,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:44,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:44,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:44,493 INFO L124 PetriNetUnfolderBase]: 428/631 cut-off events. [2024-01-31 16:56:44,493 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-01-31 16:56:44,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 631 events. 428/631 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1994 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2024-01-31 16:56:44,503 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 36 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2024-01-31 16:56:44,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 199 flow [2024-01-31 16:56:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:56:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:56:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-01-31 16:56:44,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-01-31 16:56:44,514 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 54 transitions. [2024-01-31 16:56:44,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 199 flow [2024-01-31 16:56:44,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 177 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 16:56:44,524 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 78 flow [2024-01-31 16:56:44,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2024-01-31 16:56:44,530 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-01-31 16:56:44,530 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 78 flow [2024-01-31 16:56:44,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2024-01-31 16:56:44,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:44,531 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] [2024-01-31 16:56:44,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:56:44,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:44,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2074147469, now seen corresponding path program 1 times [2024-01-31 16:56:44,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:44,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960214167] [2024-01-31 16:56:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:44,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:44,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:44,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960214167] [2024-01-31 16:56:44,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960214167] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:56:44,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:56:44,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:56:44,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254703067] [2024-01-31 16:56:44,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:56:44,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:56:44,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:56:44,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:56:44,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:44,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:56:44,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:44,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:44,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:45,065 INFO L124 PetriNetUnfolderBase]: 586/837 cut-off events. [2024-01-31 16:56:45,065 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-01-31 16:56:45,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 837 events. 586/837 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2736 event pairs, 231 based on Foata normal form. 2/839 useless extension candidates. Maximal degree in co-relation 597. Up to 620 conditions per place. [2024-01-31 16:56:45,069 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 49 selfloop transitions, 18 changer transitions 3/71 dead transitions. [2024-01-31 16:56:45,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 71 transitions, 355 flow [2024-01-31 16:56:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:56:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:56:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-01-31 16:56:45,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-01-31 16:56:45,071 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 78 flow. Second operand 7 states and 89 transitions. [2024-01-31 16:56:45,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 71 transitions, 355 flow [2024-01-31 16:56:45,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 71 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:56:45,074 INFO L231 Difference]: Finished difference. Result has 36 places, 42 transitions, 202 flow [2024-01-31 16:56:45,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=36, PETRI_TRANSITIONS=42} [2024-01-31 16:56:45,074 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-01-31 16:56:45,075 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 42 transitions, 202 flow [2024-01-31 16:56:45,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:56:45,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:45,075 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] [2024-01-31 16:56:45,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:56:45,075 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:45,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1694506029, now seen corresponding path program 2 times [2024-01-31 16:56:45,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:45,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670268067] [2024-01-31 16:56:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:45,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:45,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:45,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670268067] [2024-01-31 16:56:45,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670268067] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:45,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085542498] [2024-01-31 16:56:45,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:56:45,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:45,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:45,280 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) [2024-01-31 16:56:45,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:56:45,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:56:45,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:45,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:56:45,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:45,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:46,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085542498] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:46,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:56:46,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2024-01-31 16:56:46,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868562234] [2024-01-31 16:56:46,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:56:46,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:56:46,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:56:46,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:56:46,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:46,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 42 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:56:46,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:46,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:46,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:46,427 INFO L124 PetriNetUnfolderBase]: 953/1383 cut-off events. [2024-01-31 16:56:46,428 INFO L125 PetriNetUnfolderBase]: For 1336/1336 co-relation queries the response was YES. [2024-01-31 16:56:46,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4402 conditions, 1383 events. 953/1383 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5151 event pairs, 257 based on Foata normal form. 8/1391 useless extension candidates. Maximal degree in co-relation 2476. Up to 504 conditions per place. [2024-01-31 16:56:46,435 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 102 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-01-31 16:56:46,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 124 transitions, 748 flow [2024-01-31 16:56:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:56:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:56:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-01-31 16:56:46,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-01-31 16:56:46,441 INFO L175 Difference]: Start difference. First operand has 36 places, 42 transitions, 202 flow. Second operand 8 states and 135 transitions. [2024-01-31 16:56:46,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 124 transitions, 748 flow [2024-01-31 16:56:46,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 124 transitions, 726 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-01-31 16:56:46,446 INFO L231 Difference]: Finished difference. Result has 47 places, 56 transitions, 335 flow [2024-01-31 16:56:46,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=335, PETRI_PLACES=47, PETRI_TRANSITIONS=56} [2024-01-31 16:56:46,447 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-01-31 16:56:46,447 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 56 transitions, 335 flow [2024-01-31 16:56:46,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:56:46,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:46,447 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] [2024-01-31 16:56:46,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:46,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:46,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:46,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:46,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2068378681, now seen corresponding path program 3 times [2024-01-31 16:56:46,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:46,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792425830] [2024-01-31 16:56:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:46,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:46,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792425830] [2024-01-31 16:56:46,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792425830] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:56:46,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:56:46,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:56:46,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139080241] [2024-01-31 16:56:46,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:56:46,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:56:46,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:46,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:56:46,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:56:46,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:46,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 56 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:56:46,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:46,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:46,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:47,039 INFO L124 PetriNetUnfolderBase]: 1156/1652 cut-off events. [2024-01-31 16:56:47,039 INFO L125 PetriNetUnfolderBase]: For 4334/4334 co-relation queries the response was YES. [2024-01-31 16:56:47,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6593 conditions, 1652 events. 1156/1652 cut-off events. For 4334/4334 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6202 event pairs, 423 based on Foata normal form. 2/1654 useless extension candidates. Maximal degree in co-relation 4247. Up to 1230 conditions per place. [2024-01-31 16:56:47,049 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 70 selfloop transitions, 28 changer transitions 3/102 dead transitions. [2024-01-31 16:56:47,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 102 transitions, 790 flow [2024-01-31 16:56:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:56:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:56:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-01-31 16:56:47,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-01-31 16:56:47,052 INFO L175 Difference]: Start difference. First operand has 47 places, 56 transitions, 335 flow. Second operand 7 states and 89 transitions. [2024-01-31 16:56:47,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 102 transitions, 790 flow [2024-01-31 16:56:47,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 102 transitions, 770 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-01-31 16:56:47,067 INFO L231 Difference]: Finished difference. Result has 56 places, 72 transitions, 533 flow [2024-01-31 16:56:47,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=533, PETRI_PLACES=56, PETRI_TRANSITIONS=72} [2024-01-31 16:56:47,068 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-01-31 16:56:47,068 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 72 transitions, 533 flow [2024-01-31 16:56:47,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:56:47,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:47,069 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] [2024-01-31 16:56:47,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:56:47,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:47,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1310370119, now seen corresponding path program 4 times [2024-01-31 16:56:47,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:47,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404842729] [2024-01-31 16:56:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:47,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:47,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:47,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404842729] [2024-01-31 16:56:47,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404842729] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:47,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154623328] [2024-01-31 16:56:47,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:56:47,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:47,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:47,189 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) [2024-01-31 16:56:47,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:56:47,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:56:47,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:47,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:56:47,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:47,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:47,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154623328] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:47,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:47,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-01-31 16:56:47,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746169986] [2024-01-31 16:56:47,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:47,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:56:47,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:47,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:56:47,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:56:47,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:47,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 72 transitions, 533 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 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) [2024-01-31 16:56:47,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:47,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:47,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:48,683 INFO L124 PetriNetUnfolderBase]: 1849/2801 cut-off events. [2024-01-31 16:56:48,684 INFO L125 PetriNetUnfolderBase]: For 9661/9661 co-relation queries the response was YES. [2024-01-31 16:56:48,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12262 conditions, 2801 events. 1849/2801 cut-off events. For 9661/9661 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13105 event pairs, 234 based on Foata normal form. 26/2827 useless extension candidates. Maximal degree in co-relation 7742. Up to 927 conditions per place. [2024-01-31 16:56:48,702 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 219 selfloop transitions, 78 changer transitions 0/298 dead transitions. [2024-01-31 16:56:48,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 298 transitions, 2311 flow [2024-01-31 16:56:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:56:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:56:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 313 transitions. [2024-01-31 16:56:48,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269360269360269 [2024-01-31 16:56:48,704 INFO L175 Difference]: Start difference. First operand has 56 places, 72 transitions, 533 flow. Second operand 22 states and 313 transitions. [2024-01-31 16:56:48,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 298 transitions, 2311 flow [2024-01-31 16:56:48,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 298 transitions, 2225 flow, removed 43 selfloop flow, removed 0 redundant places. [2024-01-31 16:56:48,736 INFO L231 Difference]: Finished difference. Result has 93 places, 127 transitions, 1243 flow [2024-01-31 16:56:48,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1243, PETRI_PLACES=93, PETRI_TRANSITIONS=127} [2024-01-31 16:56:48,737 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-01-31 16:56:48,737 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 127 transitions, 1243 flow [2024-01-31 16:56:48,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 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) [2024-01-31 16:56:48,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:48,737 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] [2024-01-31 16:56:48,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:48,951 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 [2024-01-31 16:56:48,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:48,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:48,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1018319988, now seen corresponding path program 1 times [2024-01-31 16:56:48,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:48,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921658849] [2024-01-31 16:56:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:48,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:49,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:49,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921658849] [2024-01-31 16:56:49,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921658849] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:56:49,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:56:49,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:56:49,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099324295] [2024-01-31 16:56:49,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:56:49,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:56:49,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:49,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:56:49,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:56:49,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:49,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 127 transitions, 1243 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:56:49,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:49,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:49,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:49,441 INFO L124 PetriNetUnfolderBase]: 1950/2981 cut-off events. [2024-01-31 16:56:49,441 INFO L125 PetriNetUnfolderBase]: For 26533/26533 co-relation queries the response was YES. [2024-01-31 16:56:49,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16818 conditions, 2981 events. 1950/2981 cut-off events. For 26533/26533 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14359 event pairs, 631 based on Foata normal form. 16/2997 useless extension candidates. Maximal degree in co-relation 13577. Up to 1777 conditions per place. [2024-01-31 16:56:49,464 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 165 selfloop transitions, 41 changer transitions 6/213 dead transitions. [2024-01-31 16:56:49,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 213 transitions, 2347 flow [2024-01-31 16:56:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:56:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:56:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-01-31 16:56:49,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-01-31 16:56:49,466 INFO L175 Difference]: Start difference. First operand has 93 places, 127 transitions, 1243 flow. Second operand 7 states and 105 transitions. [2024-01-31 16:56:49,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 213 transitions, 2347 flow [2024-01-31 16:56:49,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 213 transitions, 2235 flow, removed 56 selfloop flow, removed 0 redundant places. [2024-01-31 16:56:49,515 INFO L231 Difference]: Finished difference. Result has 103 places, 135 transitions, 1389 flow [2024-01-31 16:56:49,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1389, PETRI_PLACES=103, PETRI_TRANSITIONS=135} [2024-01-31 16:56:49,516 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2024-01-31 16:56:49,516 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 135 transitions, 1389 flow [2024-01-31 16:56:49,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:56:49,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:49,517 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] [2024-01-31 16:56:49,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:56:49,517 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:49,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1721431790, now seen corresponding path program 2 times [2024-01-31 16:56:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:49,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535505352] [2024-01-31 16:56:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:49,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:49,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:49,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535505352] [2024-01-31 16:56:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535505352] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:49,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023444197] [2024-01-31 16:56:49,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:56:49,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:49,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:49,673 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) [2024-01-31 16:56:49,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:56:49,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:56:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:49,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:56:49,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:49,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:49,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023444197] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:49,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:56:49,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 13 [2024-01-31 16:56:49,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737388771] [2024-01-31 16:56:49,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:56:49,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:56:49,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:49,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:56:49,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:56:49,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:49,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 1389 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:56:49,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:49,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:49,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:50,457 INFO L124 PetriNetUnfolderBase]: 2288/3489 cut-off events. [2024-01-31 16:56:50,457 INFO L125 PetriNetUnfolderBase]: For 37999/37999 co-relation queries the response was YES. [2024-01-31 16:56:50,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20775 conditions, 3489 events. 2288/3489 cut-off events. For 37999/37999 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17117 event pairs, 347 based on Foata normal form. 10/3499 useless extension candidates. Maximal degree in co-relation 19966. Up to 1121 conditions per place. [2024-01-31 16:56:50,484 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 189 selfloop transitions, 54 changer transitions 1/245 dead transitions. [2024-01-31 16:56:50,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 245 transitions, 2842 flow [2024-01-31 16:56:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:56:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:56:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-01-31 16:56:50,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-01-31 16:56:50,486 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 1389 flow. Second operand 8 states and 135 transitions. [2024-01-31 16:56:50,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 245 transitions, 2842 flow [2024-01-31 16:56:50,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 245 transitions, 2663 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-01-31 16:56:50,574 INFO L231 Difference]: Finished difference. Result has 111 places, 163 transitions, 1839 flow [2024-01-31 16:56:50,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1839, PETRI_PLACES=111, PETRI_TRANSITIONS=163} [2024-01-31 16:56:50,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-01-31 16:56:50,575 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 163 transitions, 1839 flow [2024-01-31 16:56:50,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:56:50,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:50,575 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] [2024-01-31 16:56:50,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:50,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:50,785 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:50,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1936107039, now seen corresponding path program 5 times [2024-01-31 16:56:50,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:50,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807817607] [2024-01-31 16:56:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:50,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:50,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:50,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807817607] [2024-01-31 16:56:50,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807817607] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:50,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111102382] [2024-01-31 16:56:50,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:56:50,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:50,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:50,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:50,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:56:50,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:56:50,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:50,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:56:50,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:51,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:51,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111102382] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:51,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:51,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-01-31 16:56:51,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251404396] [2024-01-31 16:56:51,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:51,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:56:51,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:51,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:56:51,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:56:51,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:51,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 163 transitions, 1839 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2024-01-31 16:56:51,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:51,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:51,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:52,273 INFO L124 PetriNetUnfolderBase]: 3273/4995 cut-off events. [2024-01-31 16:56:52,273 INFO L125 PetriNetUnfolderBase]: For 66292/66292 co-relation queries the response was YES. [2024-01-31 16:56:52,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31327 conditions, 4995 events. 3273/4995 cut-off events. For 66292/66292 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26440 event pairs, 323 based on Foata normal form. 42/5037 useless extension candidates. Maximal degree in co-relation 29530. Up to 2017 conditions per place. [2024-01-31 16:56:52,310 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 237 selfloop transitions, 235 changer transitions 4/477 dead transitions. [2024-01-31 16:56:52,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 477 transitions, 6032 flow [2024-01-31 16:56:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:56:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:56:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 282 transitions. [2024-01-31 16:56:52,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-01-31 16:56:52,312 INFO L175 Difference]: Start difference. First operand has 111 places, 163 transitions, 1839 flow. Second operand 21 states and 282 transitions. [2024-01-31 16:56:52,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 477 transitions, 6032 flow [2024-01-31 16:56:52,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 477 transitions, 5872 flow, removed 80 selfloop flow, removed 0 redundant places. [2024-01-31 16:56:52,550 INFO L231 Difference]: Finished difference. Result has 146 places, 323 transitions, 4744 flow [2024-01-31 16:56:52,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4744, PETRI_PLACES=146, PETRI_TRANSITIONS=323} [2024-01-31 16:56:52,551 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 116 predicate places. [2024-01-31 16:56:52,551 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 323 transitions, 4744 flow [2024-01-31 16:56:52,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2024-01-31 16:56:52,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:52,552 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] [2024-01-31 16:56:52,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 16:56:52,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:52,763 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:52,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:52,763 INFO L85 PathProgramCache]: Analyzing trace with hash -48422860, now seen corresponding path program 3 times [2024-01-31 16:56:52,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:52,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638230505] [2024-01-31 16:56:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:52,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:52,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:52,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638230505] [2024-01-31 16:56:52,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638230505] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:52,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875927375] [2024-01-31 16:56:52,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:56:52,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:52,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:52,887 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:52,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:56:52,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:56:52,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:52,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:56:52,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:53,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:53,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875927375] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:53,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:53,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-01-31 16:56:53,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904767007] [2024-01-31 16:56:53,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:53,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:56:53,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:53,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:56:53,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:56:53,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:53,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 323 transitions, 4744 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2024-01-31 16:56:53,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:53,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:53,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:55,130 INFO L124 PetriNetUnfolderBase]: 5185/7891 cut-off events. [2024-01-31 16:56:55,130 INFO L125 PetriNetUnfolderBase]: For 158215/158215 co-relation queries the response was YES. [2024-01-31 16:56:55,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57905 conditions, 7891 events. 5185/7891 cut-off events. For 158215/158215 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 45210 event pairs, 707 based on Foata normal form. 44/7935 useless extension candidates. Maximal degree in co-relation 55500. Up to 2749 conditions per place. [2024-01-31 16:56:55,217 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 378 selfloop transitions, 337 changer transitions 0/716 dead transitions. [2024-01-31 16:56:55,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 716 transitions, 10911 flow [2024-01-31 16:56:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:56:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:56:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 327 transitions. [2024-01-31 16:56:55,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505050505050505 [2024-01-31 16:56:55,221 INFO L175 Difference]: Start difference. First operand has 146 places, 323 transitions, 4744 flow. Second operand 22 states and 327 transitions. [2024-01-31 16:56:55,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 716 transitions, 10911 flow [2024-01-31 16:56:56,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 716 transitions, 10113 flow, removed 368 selfloop flow, removed 1 redundant places. [2024-01-31 16:56:56,033 INFO L231 Difference]: Finished difference. Result has 184 places, 467 transitions, 7750 flow [2024-01-31 16:56:56,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7750, PETRI_PLACES=184, PETRI_TRANSITIONS=467} [2024-01-31 16:56:56,034 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2024-01-31 16:56:56,034 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 467 transitions, 7750 flow [2024-01-31 16:56:56,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2024-01-31 16:56:56,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:56,035 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] [2024-01-31 16:56:56,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:56,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:56,246 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:56,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:56,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1856011617, now seen corresponding path program 6 times [2024-01-31 16:56:56,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:56,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53137033] [2024-01-31 16:56:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:56,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:56,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:56,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53137033] [2024-01-31 16:56:56,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53137033] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:56,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104304787] [2024-01-31 16:56:56,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:56:56,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:56,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:56,367 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:56,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:56:56,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:56:56,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:56,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:56:56,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:56,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:56,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104304787] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:56,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:56:56,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 16 [2024-01-31 16:56:56,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081797897] [2024-01-31 16:56:56,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:56:56,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:56:56,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:56,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:56:56,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:56:56,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:56,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 467 transitions, 7750 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:56:56,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:56,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:56,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:58,108 INFO L124 PetriNetUnfolderBase]: 5307/8069 cut-off events. [2024-01-31 16:56:58,108 INFO L125 PetriNetUnfolderBase]: For 170239/170239 co-relation queries the response was YES. [2024-01-31 16:56:58,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62832 conditions, 8069 events. 5307/8069 cut-off events. For 170239/170239 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 45987 event pairs, 1404 based on Foata normal form. 36/8105 useless extension candidates. Maximal degree in co-relation 61950. Up to 4449 conditions per place. [2024-01-31 16:56:58,189 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 453 selfloop transitions, 94 changer transitions 0/548 dead transitions. [2024-01-31 16:56:58,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 548 transitions, 9869 flow [2024-01-31 16:56:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:56:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:56:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-01-31 16:56:58,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864197530864198 [2024-01-31 16:56:58,190 INFO L175 Difference]: Start difference. First operand has 184 places, 467 transitions, 7750 flow. Second operand 6 states and 95 transitions. [2024-01-31 16:56:58,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 548 transitions, 9869 flow [2024-01-31 16:56:58,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 548 transitions, 9655 flow, removed 107 selfloop flow, removed 0 redundant places. [2024-01-31 16:56:58,989 INFO L231 Difference]: Finished difference. Result has 192 places, 487 transitions, 8199 flow [2024-01-31 16:56:58,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7590, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8199, PETRI_PLACES=192, PETRI_TRANSITIONS=487} [2024-01-31 16:56:58,990 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2024-01-31 16:56:58,990 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 487 transitions, 8199 flow [2024-01-31 16:56:58,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:56:58,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:58,991 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] [2024-01-31 16:56:59,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:59,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:59,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:56:59,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash 737638937, now seen corresponding path program 1 times [2024-01-31 16:56:59,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:59,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49772542] [2024-01-31 16:56:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:59,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:59,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:59,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49772542] [2024-01-31 16:56:59,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49772542] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:56:59,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:56:59,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:56:59,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753613691] [2024-01-31 16:56:59,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:56:59,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:56:59,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:56:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:56:59,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:56:59,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 487 transitions, 8199 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:56:59,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:59,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:56:59,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:00,841 INFO L124 PetriNetUnfolderBase]: 5319/8120 cut-off events. [2024-01-31 16:57:00,841 INFO L125 PetriNetUnfolderBase]: For 187619/187619 co-relation queries the response was YES. [2024-01-31 16:57:00,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63957 conditions, 8120 events. 5319/8120 cut-off events. For 187619/187619 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 46713 event pairs, 1557 based on Foata normal form. 24/8144 useless extension candidates. Maximal degree in co-relation 63339. Up to 5219 conditions per place. [2024-01-31 16:57:00,916 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 423 selfloop transitions, 108 changer transitions 17/549 dead transitions. [2024-01-31 16:57:00,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 549 transitions, 9804 flow [2024-01-31 16:57:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:57:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:57:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-01-31 16:57:00,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-01-31 16:57:00,917 INFO L175 Difference]: Start difference. First operand has 192 places, 487 transitions, 8199 flow. Second operand 7 states and 107 transitions. [2024-01-31 16:57:00,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 549 transitions, 9804 flow [2024-01-31 16:57:01,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 549 transitions, 9690 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-01-31 16:57:01,728 INFO L231 Difference]: Finished difference. Result has 199 places, 486 transitions, 8299 flow [2024-01-31 16:57:01,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8085, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8299, PETRI_PLACES=199, PETRI_TRANSITIONS=486} [2024-01-31 16:57:01,729 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-01-31 16:57:01,729 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 486 transitions, 8299 flow [2024-01-31 16:57:01,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:57:01,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:01,729 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] [2024-01-31 16:57:01,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:57:01,730 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:01,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash 685728783, now seen corresponding path program 7 times [2024-01-31 16:57:01,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:01,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281769169] [2024-01-31 16:57:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:01,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:01,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281769169] [2024-01-31 16:57:01,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281769169] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:01,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116771071] [2024-01-31 16:57:01,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:57:01,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:01,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:01,848 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:01,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:57:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:01,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:57:01,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:02,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:02,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116771071] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:02,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:57:02,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 10 [2024-01-31 16:57:02,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783395727] [2024-01-31 16:57:02,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:57:02,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:57:02,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:57:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:57:02,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:02,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 486 transitions, 8299 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:02,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:02,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:02,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:03,576 INFO L124 PetriNetUnfolderBase]: 5316/8106 cut-off events. [2024-01-31 16:57:03,576 INFO L125 PetriNetUnfolderBase]: For 184616/184616 co-relation queries the response was YES. [2024-01-31 16:57:03,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64392 conditions, 8106 events. 5316/8106 cut-off events. For 184616/184616 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 46527 event pairs, 1420 based on Foata normal form. 32/8138 useless extension candidates. Maximal degree in co-relation 64066. Up to 4537 conditions per place. [2024-01-31 16:57:03,652 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 460 selfloop transitions, 92 changer transitions 0/553 dead transitions. [2024-01-31 16:57:03,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 553 transitions, 10189 flow [2024-01-31 16:57:03,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:57:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:57:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-01-31 16:57:03,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-01-31 16:57:03,653 INFO L175 Difference]: Start difference. First operand has 199 places, 486 transitions, 8299 flow. Second operand 6 states and 93 transitions. [2024-01-31 16:57:03,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 553 transitions, 10189 flow [2024-01-31 16:57:04,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 553 transitions, 9963 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-01-31 16:57:04,523 INFO L231 Difference]: Finished difference. Result has 196 places, 491 transitions, 8368 flow [2024-01-31 16:57:04,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8073, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8368, PETRI_PLACES=196, PETRI_TRANSITIONS=491} [2024-01-31 16:57:04,525 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-01-31 16:57:04,525 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 491 transitions, 8368 flow [2024-01-31 16:57:04,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:04,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:04,526 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] [2024-01-31 16:57:04,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 16:57:04,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:04,734 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:04,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1974547524, now seen corresponding path program 4 times [2024-01-31 16:57:04,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:04,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693141324] [2024-01-31 16:57:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:04,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:04,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:04,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693141324] [2024-01-31 16:57:04,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693141324] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:04,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203700784] [2024-01-31 16:57:04,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:57:04,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:04,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:04,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:04,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:57:04,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:57:04,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:04,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:57:04,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:04,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:05,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203700784] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:05,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:05,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-01-31 16:57:05,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033535745] [2024-01-31 16:57:05,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:05,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:57:05,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:05,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:57:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:57:05,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:05,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 491 transitions, 8368 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 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) [2024-01-31 16:57:05,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:05,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:05,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:07,107 INFO L124 PetriNetUnfolderBase]: 5490/8387 cut-off events. [2024-01-31 16:57:07,108 INFO L125 PetriNetUnfolderBase]: For 195569/195569 co-relation queries the response was YES. [2024-01-31 16:57:07,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66480 conditions, 8387 events. 5490/8387 cut-off events. For 195569/195569 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 48722 event pairs, 1077 based on Foata normal form. 66/8453 useless extension candidates. Maximal degree in co-relation 65842. Up to 2878 conditions per place. [2024-01-31 16:57:07,198 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 510 selfloop transitions, 219 changer transitions 0/730 dead transitions. [2024-01-31 16:57:07,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 730 transitions, 12556 flow [2024-01-31 16:57:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:57:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:57:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 258 transitions. [2024-01-31 16:57:07,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029239766081871 [2024-01-31 16:57:07,200 INFO L175 Difference]: Start difference. First operand has 196 places, 491 transitions, 8368 flow. Second operand 19 states and 258 transitions. [2024-01-31 16:57:07,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 730 transitions, 12556 flow [2024-01-31 16:57:08,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 730 transitions, 12318 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:57:08,121 INFO L231 Difference]: Finished difference. Result has 221 places, 539 transitions, 9570 flow [2024-01-31 16:57:08,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8184, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9570, PETRI_PLACES=221, PETRI_TRANSITIONS=539} [2024-01-31 16:57:08,122 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-01-31 16:57:08,122 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 539 transitions, 9570 flow [2024-01-31 16:57:08,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 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) [2024-01-31 16:57:08,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:08,122 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] [2024-01-31 16:57:08,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 16:57:08,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-31 16:57:08,328 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:08,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2028312588, now seen corresponding path program 5 times [2024-01-31 16:57:08,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:08,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468633274] [2024-01-31 16:57:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:08,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:08,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:08,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468633274] [2024-01-31 16:57:08,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468633274] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:08,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279052978] [2024-01-31 16:57:08,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:57:08,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:08,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:08,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:08,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 16:57:08,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:57:08,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:08,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:57:08,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:08,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:08,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279052978] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:08,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:08,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2024-01-31 16:57:08,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771657365] [2024-01-31 16:57:08,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:08,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:57:08,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:57:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:57:08,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:08,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 539 transitions, 9570 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:08,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:08,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:08,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:10,692 INFO L124 PetriNetUnfolderBase]: 5511/8417 cut-off events. [2024-01-31 16:57:10,692 INFO L125 PetriNetUnfolderBase]: For 235220/235220 co-relation queries the response was YES. [2024-01-31 16:57:10,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71757 conditions, 8417 events. 5511/8417 cut-off events. For 235220/235220 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 48940 event pairs, 1009 based on Foata normal form. 36/8453 useless extension candidates. Maximal degree in co-relation 71550. Up to 2911 conditions per place. [2024-01-31 16:57:10,889 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 515 selfloop transitions, 243 changer transitions 0/759 dead transitions. [2024-01-31 16:57:10,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 759 transitions, 13504 flow [2024-01-31 16:57:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:57:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:57:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 274 transitions. [2024-01-31 16:57:10,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48324514991181655 [2024-01-31 16:57:10,890 INFO L175 Difference]: Start difference. First operand has 221 places, 539 transitions, 9570 flow. Second operand 21 states and 274 transitions. [2024-01-31 16:57:10,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 759 transitions, 13504 flow [2024-01-31 16:57:11,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 759 transitions, 13165 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-01-31 16:57:11,910 INFO L231 Difference]: Finished difference. Result has 248 places, 569 transitions, 10396 flow [2024-01-31 16:57:11,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9215, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10396, PETRI_PLACES=248, PETRI_TRANSITIONS=569} [2024-01-31 16:57:11,911 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-01-31 16:57:11,911 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 569 transitions, 10396 flow [2024-01-31 16:57:11,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:11,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:11,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:57:11,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 16:57:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 16:57:12,120 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:12,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash -569670317, now seen corresponding path program 8 times [2024-01-31 16:57:12,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:12,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802115819] [2024-01-31 16:57:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:12,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:12,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802115819] [2024-01-31 16:57:12,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802115819] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348943648] [2024-01-31 16:57:12,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:57:12,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:12,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:12,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:12,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 16:57:12,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:57:12,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:12,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:57:12,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:12,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:12,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348943648] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:12,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:57:12,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2024-01-31 16:57:12,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153648462] [2024-01-31 16:57:12,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:57:12,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:57:12,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:12,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:57:12,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:57:12,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:12,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 569 transitions, 10396 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:12,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:12,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:12,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:14,470 INFO L124 PetriNetUnfolderBase]: 6381/9723 cut-off events. [2024-01-31 16:57:14,470 INFO L125 PetriNetUnfolderBase]: For 320322/320322 co-relation queries the response was YES. [2024-01-31 16:57:14,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87819 conditions, 9723 events. 6381/9723 cut-off events. For 320322/320322 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 57765 event pairs, 800 based on Foata normal form. 32/9755 useless extension candidates. Maximal degree in co-relation 87308. Up to 3319 conditions per place. [2024-01-31 16:57:14,573 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 519 selfloop transitions, 248 changer transitions 0/768 dead transitions. [2024-01-31 16:57:14,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 768 transitions, 15020 flow [2024-01-31 16:57:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:57:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:57:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-01-31 16:57:14,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2024-01-31 16:57:14,575 INFO L175 Difference]: Start difference. First operand has 248 places, 569 transitions, 10396 flow. Second operand 8 states and 137 transitions. [2024-01-31 16:57:14,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 768 transitions, 15020 flow [2024-01-31 16:57:16,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 768 transitions, 14640 flow, removed 121 selfloop flow, removed 2 redundant places. [2024-01-31 16:57:16,272 INFO L231 Difference]: Finished difference. Result has 258 places, 653 transitions, 12732 flow [2024-01-31 16:57:16,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10054, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12732, PETRI_PLACES=258, PETRI_TRANSITIONS=653} [2024-01-31 16:57:16,273 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 228 predicate places. [2024-01-31 16:57:16,273 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 653 transitions, 12732 flow [2024-01-31 16:57:16,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:16,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:16,273 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] [2024-01-31 16:57:16,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 16:57:16,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:57:16,476 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:16,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1903193061, now seen corresponding path program 9 times [2024-01-31 16:57:16,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:16,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909722202] [2024-01-31 16:57:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:16,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:16,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909722202] [2024-01-31 16:57:16,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909722202] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173049806] [2024-01-31 16:57:16,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:57:16,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:16,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:16,623 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:16,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 16:57:16,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:57:16,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:16,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:57:16,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:16,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:16,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173049806] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:16,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:57:16,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2024-01-31 16:57:16,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472504769] [2024-01-31 16:57:16,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:57:16,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:57:16,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:57:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:57:16,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:16,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 653 transitions, 12732 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:16,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:16,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:16,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:18,856 INFO L124 PetriNetUnfolderBase]: 6342/9682 cut-off events. [2024-01-31 16:57:18,856 INFO L125 PetriNetUnfolderBase]: For 365708/365708 co-relation queries the response was YES. [2024-01-31 16:57:18,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90549 conditions, 9682 events. 6342/9682 cut-off events. For 365708/365708 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 57586 event pairs, 1365 based on Foata normal form. 36/9718 useless extension candidates. Maximal degree in co-relation 90032. Up to 5245 conditions per place. [2024-01-31 16:57:18,960 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 528 selfloop transitions, 193 changer transitions 0/722 dead transitions. [2024-01-31 16:57:18,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 722 transitions, 15118 flow [2024-01-31 16:57:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:57:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:57:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-01-31 16:57:18,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864197530864198 [2024-01-31 16:57:18,961 INFO L175 Difference]: Start difference. First operand has 258 places, 653 transitions, 12732 flow. Second operand 6 states and 95 transitions. [2024-01-31 16:57:18,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 722 transitions, 15118 flow [2024-01-31 16:57:21,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 722 transitions, 14862 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-01-31 16:57:21,206 INFO L231 Difference]: Finished difference. Result has 263 places, 659 transitions, 13197 flow [2024-01-31 16:57:21,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12506, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13197, PETRI_PLACES=263, PETRI_TRANSITIONS=659} [2024-01-31 16:57:21,206 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2024-01-31 16:57:21,206 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 659 transitions, 13197 flow [2024-01-31 16:57:21,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:21,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:21,207 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] [2024-01-31 16:57:21,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 16:57:21,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 16:57:21,411 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:21,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:21,411 INFO L85 PathProgramCache]: Analyzing trace with hash 944502173, now seen corresponding path program 10 times [2024-01-31 16:57:21,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:21,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284180456] [2024-01-31 16:57:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:21,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:21,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284180456] [2024-01-31 16:57:21,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284180456] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:21,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355662664] [2024-01-31 16:57:21,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:57:21,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:21,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:21,515 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:21,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 16:57:21,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:57:21,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:21,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:57:21,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:21,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:21,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355662664] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:21,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:57:21,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2024-01-31 16:57:21,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104621716] [2024-01-31 16:57:21,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:57:21,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:57:21,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:21,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:57:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:57:21,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:21,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 659 transitions, 13197 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:21,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:21,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:21,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:23,931 INFO L124 PetriNetUnfolderBase]: 6299/9564 cut-off events. [2024-01-31 16:57:23,931 INFO L125 PetriNetUnfolderBase]: For 341617/341617 co-relation queries the response was YES. [2024-01-31 16:57:23,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90283 conditions, 9564 events. 6299/9564 cut-off events. For 341617/341617 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 56214 event pairs, 1355 based on Foata normal form. 32/9596 useless extension candidates. Maximal degree in co-relation 89780. Up to 5072 conditions per place. [2024-01-31 16:57:24,031 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 523 selfloop transitions, 199 changer transitions 0/723 dead transitions. [2024-01-31 16:57:24,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 723 transitions, 15419 flow [2024-01-31 16:57:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:57:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:57:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-01-31 16:57:24,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-01-31 16:57:24,032 INFO L175 Difference]: Start difference. First operand has 263 places, 659 transitions, 13197 flow. Second operand 6 states and 93 transitions. [2024-01-31 16:57:24,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 723 transitions, 15419 flow [2024-01-31 16:57:25,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 723 transitions, 15050 flow, removed 69 selfloop flow, removed 2 redundant places. [2024-01-31 16:57:25,866 INFO L231 Difference]: Finished difference. Result has 267 places, 659 transitions, 13259 flow [2024-01-31 16:57:25,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12848, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13259, PETRI_PLACES=267, PETRI_TRANSITIONS=659} [2024-01-31 16:57:25,867 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2024-01-31 16:57:25,867 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 659 transitions, 13259 flow [2024-01-31 16:57:25,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:57:25,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:25,867 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] [2024-01-31 16:57:25,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 16:57:26,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 16:57:26,078 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:26,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash 610470797, now seen corresponding path program 11 times [2024-01-31 16:57:26,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:26,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252892734] [2024-01-31 16:57:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:26,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:26,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:26,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252892734] [2024-01-31 16:57:26,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252892734] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:26,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760334267] [2024-01-31 16:57:26,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:57:26,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:26,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:26,175 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:26,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 16:57:26,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:57:26,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:26,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:57:26,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:26,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760334267] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:26,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:26,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-01-31 16:57:26,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044167655] [2024-01-31 16:57:26,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:26,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:57:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:26,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:57:26,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:57:26,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:26,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 659 transitions, 13259 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-01-31 16:57:26,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:26,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:26,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:29,937 INFO L124 PetriNetUnfolderBase]: 8430/12759 cut-off events. [2024-01-31 16:57:29,937 INFO L125 PetriNetUnfolderBase]: For 403144/403144 co-relation queries the response was YES. [2024-01-31 16:57:30,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117691 conditions, 12759 events. 8430/12759 cut-off events. For 403144/403144 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 78766 event pairs, 1527 based on Foata normal form. 62/12821 useless extension candidates. Maximal degree in co-relation 117207. Up to 6336 conditions per place. [2024-01-31 16:57:30,217 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 488 selfloop transitions, 675 changer transitions 0/1164 dead transitions. [2024-01-31 16:57:30,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 1164 transitions, 24636 flow [2024-01-31 16:57:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:57:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:57:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 365 transitions. [2024-01-31 16:57:30,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006858710562414 [2024-01-31 16:57:30,219 INFO L175 Difference]: Start difference. First operand has 267 places, 659 transitions, 13259 flow. Second operand 27 states and 365 transitions. [2024-01-31 16:57:30,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 1164 transitions, 24636 flow [2024-01-31 16:57:32,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 1164 transitions, 24284 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-01-31 16:57:32,602 INFO L231 Difference]: Finished difference. Result has 303 places, 936 transitions, 21527 flow [2024-01-31 16:57:32,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13027, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=21527, PETRI_PLACES=303, PETRI_TRANSITIONS=936} [2024-01-31 16:57:32,603 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2024-01-31 16:57:32,603 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 936 transitions, 21527 flow [2024-01-31 16:57:32,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-01-31 16:57:32,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:32,603 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] [2024-01-31 16:57:32,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-31 16:57:32,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 16:57:32,806 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:32,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:32,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1429054699, now seen corresponding path program 2 times [2024-01-31 16:57:32,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:32,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758205345] [2024-01-31 16:57:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:32,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:32,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:32,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758205345] [2024-01-31 16:57:32,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758205345] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:57:32,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:57:32,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:57:32,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900756287] [2024-01-31 16:57:32,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:57:32,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:57:32,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:57:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:57:32,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:32,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 936 transitions, 21527 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:57:32,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:32,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:32,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:36,368 INFO L124 PetriNetUnfolderBase]: 8450/12848 cut-off events. [2024-01-31 16:57:36,369 INFO L125 PetriNetUnfolderBase]: For 483192/483192 co-relation queries the response was YES. [2024-01-31 16:57:36,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129162 conditions, 12848 events. 8450/12848 cut-off events. For 483192/483192 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 79766 event pairs, 2506 based on Foata normal form. 36/12884 useless extension candidates. Maximal degree in co-relation 128626. Up to 11819 conditions per place. [2024-01-31 16:57:36,539 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 844 selfloop transitions, 125 changer transitions 11/981 dead transitions. [2024-01-31 16:57:36,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 981 transitions, 23904 flow [2024-01-31 16:57:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:57:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:57:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-01-31 16:57:36,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-01-31 16:57:36,542 INFO L175 Difference]: Start difference. First operand has 303 places, 936 transitions, 21527 flow. Second operand 7 states and 101 transitions. [2024-01-31 16:57:36,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 981 transitions, 23904 flow [2024-01-31 16:57:39,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 981 transitions, 22704 flow, removed 404 selfloop flow, removed 5 redundant places. [2024-01-31 16:57:39,994 INFO L231 Difference]: Finished difference. Result has 307 places, 936 transitions, 20612 flow [2024-01-31 16:57:39,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=20331, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20612, PETRI_PLACES=307, PETRI_TRANSITIONS=936} [2024-01-31 16:57:39,995 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-01-31 16:57:39,995 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 936 transitions, 20612 flow [2024-01-31 16:57:39,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:57:39,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:39,995 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] [2024-01-31 16:57:39,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-31 16:57:39,995 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:39,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:39,996 INFO L85 PathProgramCache]: Analyzing trace with hash -521214051, now seen corresponding path program 3 times [2024-01-31 16:57:39,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:39,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311940283] [2024-01-31 16:57:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:39,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:40,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:40,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311940283] [2024-01-31 16:57:40,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311940283] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:40,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708413634] [2024-01-31 16:57:40,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:57:40,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:40,080 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:40,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 16:57:40,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:57:40,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:40,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:57:40,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:40,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:40,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708413634] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:40,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:40,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-01-31 16:57:40,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629463738] [2024-01-31 16:57:40,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:40,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:57:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:57:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:57:40,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:40,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 936 transitions, 20612 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2024-01-31 16:57:40,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:40,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:40,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:43,844 INFO L124 PetriNetUnfolderBase]: 8444/12819 cut-off events. [2024-01-31 16:57:43,844 INFO L125 PetriNetUnfolderBase]: For 458051/458051 co-relation queries the response was YES. [2024-01-31 16:57:43,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124801 conditions, 12819 events. 8444/12819 cut-off events. For 458051/458051 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 79352 event pairs, 2510 based on Foata normal form. 16/12835 useless extension candidates. Maximal degree in co-relation 124573. Up to 11887 conditions per place. [2024-01-31 16:57:43,998 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 839 selfloop transitions, 132 changer transitions 0/972 dead transitions. [2024-01-31 16:57:43,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 972 transitions, 22953 flow [2024-01-31 16:57:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:57:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:57:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-01-31 16:57:43,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-01-31 16:57:43,999 INFO L175 Difference]: Start difference. First operand has 307 places, 936 transitions, 20612 flow. Second operand 7 states and 95 transitions. [2024-01-31 16:57:43,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 972 transitions, 22953 flow [2024-01-31 16:57:47,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 972 transitions, 22685 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-01-31 16:57:47,125 INFO L231 Difference]: Finished difference. Result has 309 places, 940 transitions, 20708 flow [2024-01-31 16:57:47,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=20354, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20708, PETRI_PLACES=309, PETRI_TRANSITIONS=940} [2024-01-31 16:57:47,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 279 predicate places. [2024-01-31 16:57:47,126 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 940 transitions, 20708 flow [2024-01-31 16:57:47,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2024-01-31 16:57:47,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:47,127 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] [2024-01-31 16:57:47,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 16:57:47,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:47,337 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:47,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:47,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1391245814, now seen corresponding path program 6 times [2024-01-31 16:57:47,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:47,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220175589] [2024-01-31 16:57:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:47,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:47,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:47,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220175589] [2024-01-31 16:57:47,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220175589] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:47,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918716532] [2024-01-31 16:57:47,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:57:47,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:47,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:47,451 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:47,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 16:57:47,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:57:47,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:47,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:57:47,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:47,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:47,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918716532] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:47,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:47,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2024-01-31 16:57:47,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64364427] [2024-01-31 16:57:47,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:47,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:57:47,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:57:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:57:47,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:47,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 940 transitions, 20708 flow. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 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) [2024-01-31 16:57:47,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:47,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:47,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:52,770 INFO L124 PetriNetUnfolderBase]: 10093/15375 cut-off events. [2024-01-31 16:57:52,770 INFO L125 PetriNetUnfolderBase]: For 540294/540294 co-relation queries the response was YES. [2024-01-31 16:57:52,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148967 conditions, 15375 events. 10093/15375 cut-off events. For 540294/540294 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 99060 event pairs, 1709 based on Foata normal form. 60/15435 useless extension candidates. Maximal degree in co-relation 148429. Up to 6768 conditions per place. [2024-01-31 16:57:52,960 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 650 selfloop transitions, 701 changer transitions 0/1352 dead transitions. [2024-01-31 16:57:52,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1352 transitions, 30833 flow [2024-01-31 16:57:52,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 16:57:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 16:57:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 389 transitions. [2024-01-31 16:57:52,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145502645502645 [2024-01-31 16:57:52,962 INFO L175 Difference]: Start difference. First operand has 309 places, 940 transitions, 20708 flow. Second operand 28 states and 389 transitions. [2024-01-31 16:57:52,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1352 transitions, 30833 flow [2024-01-31 16:57:57,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1352 transitions, 30547 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-01-31 16:57:57,217 INFO L231 Difference]: Finished difference. Result has 350 places, 1089 transitions, 26885 flow [2024-01-31 16:57:57,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=20444, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=26885, PETRI_PLACES=350, PETRI_TRANSITIONS=1089} [2024-01-31 16:57:57,218 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2024-01-31 16:57:57,218 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 1089 transitions, 26885 flow [2024-01-31 16:57:57,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 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) [2024-01-31 16:57:57,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:57,218 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] [2024-01-31 16:57:57,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-31 16:57:57,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:57,430 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:57:57,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:57,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1538964389, now seen corresponding path program 12 times [2024-01-31 16:57:57,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:57,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789031018] [2024-01-31 16:57:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:57,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:57,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:57,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789031018] [2024-01-31 16:57:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789031018] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:57:57,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:57:57,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:57:57,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491246719] [2024-01-31 16:57:57,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:57:57,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:57:57,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:57,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:57:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:57:57,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:57:57,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1089 transitions, 26885 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:57:57,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:57,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:57:57,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:58:02,426 INFO L124 PetriNetUnfolderBase]: 10060/15329 cut-off events. [2024-01-31 16:58:02,427 INFO L125 PetriNetUnfolderBase]: For 624585/624585 co-relation queries the response was YES. [2024-01-31 16:58:02,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159552 conditions, 15329 events. 10060/15329 cut-off events. For 624585/624585 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 98540 event pairs, 2829 based on Foata normal form. 28/15357 useless extension candidates. Maximal degree in co-relation 158989. Up to 13992 conditions per place. [2024-01-31 16:58:02,639 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 973 selfloop transitions, 174 changer transitions 0/1148 dead transitions. [2024-01-31 16:58:02,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1148 transitions, 30062 flow [2024-01-31 16:58:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:58:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:58:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-01-31 16:58:02,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-01-31 16:58:02,640 INFO L175 Difference]: Start difference. First operand has 350 places, 1089 transitions, 26885 flow. Second operand 7 states and 101 transitions. [2024-01-31 16:58:02,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1148 transitions, 30062 flow [2024-01-31 16:58:07,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1148 transitions, 29711 flow, removed 144 selfloop flow, removed 4 redundant places. [2024-01-31 16:58:07,861 INFO L231 Difference]: Finished difference. Result has 354 places, 1097 transitions, 27138 flow [2024-01-31 16:58:07,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=26539, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=27138, PETRI_PLACES=354, PETRI_TRANSITIONS=1097} [2024-01-31 16:58:07,862 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 324 predicate places. [2024-01-31 16:58:07,862 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1097 transitions, 27138 flow [2024-01-31 16:58:07,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-01-31 16:58:07,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:58:07,863 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] [2024-01-31 16:58:07,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-01-31 16:58:07,863 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:58:07,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:58:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1932727601, now seen corresponding path program 13 times [2024-01-31 16:58:07,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:58:07,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281482725] [2024-01-31 16:58:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:58:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:58:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:58:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:58:07,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:58:07,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281482725] [2024-01-31 16:58:07,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281482725] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:58:07,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911376277] [2024-01-31 16:58:07,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:58:07,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:58:07,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:58:07,972 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:58:07,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 16:58:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:58:08,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:58:08,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:58:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:58:08,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:58:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:58:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911376277] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:58:08,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:58:08,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-01-31 16:58:08,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706118782] [2024-01-31 16:58:08,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:58:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:58:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:58:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:58:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:58:08,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 16:58:08,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1097 transitions, 27138 flow. Second operand has 16 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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) [2024-01-31 16:58:08,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:58:08,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 16:58:08,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand