./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/fibonacci.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/fibonacci.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/fibonacci.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fibonacci.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 16:52:58,355 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:52:58,426 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:52:58,429 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:52:58,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:52:58,443 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:52:58,444 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:52:58,444 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:52:58,445 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:52:58,447 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:52:58,448 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:52:58,448 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:52:58,449 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:52:58,449 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:52:58,449 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:52:58,449 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:52:58,450 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:52:58,450 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:52:58,450 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:52:58,450 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:52:58,450 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:52:58,451 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:52:58,451 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:52:58,451 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:52:58,451 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:52:58,452 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:52:58,452 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:52:58,452 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:52:58,452 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:52:58,452 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:52:58,453 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:52:58,453 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:52:58,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:52:58,454 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:52:58,454 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:52:58,454 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:52:58,454 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:52:58,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:52:58,454 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:52:58,455 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:52:58,455 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:52:58,455 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:52:58,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:52:58,455 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:52:58,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:52:58,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:52:58,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:52:58,662 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:52:58,662 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:52:58,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c [2024-01-31 16:52:59,626 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:52:59,761 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:52:59,765 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c [2024-01-31 16:52:59,770 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a839527/83dcdda32eeb415bb534a024f087a6b7/FLAG3970c83e3 [2024-01-31 16:52:59,781 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a839527/83dcdda32eeb415bb534a024f087a6b7 [2024-01-31 16:52:59,783 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:52:59,783 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:52:59,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fibonacci.wvr.yml/witness.yml [2024-01-31 16:52:59,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:52:59,866 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:52:59,867 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:52:59,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:52:59,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:52:59,875 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:52:59" (1/2) ... [2024-01-31 16:52:59,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154dc088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:59, skipping insertion in model container [2024-01-31 16:52:59,876 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:52:59" (1/2) ... [2024-01-31 16:52:59,877 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@169a07d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:52:59, skipping insertion in model container [2024-01-31 16:52:59,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:52:59" (2/2) ... [2024-01-31 16:52:59,878 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154dc088 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:52:59, skipping insertion in model container [2024-01-31 16:52:59,878 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:52:59" (2/2) ... [2024-01-31 16:52:59,878 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:52:59,907 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 16:52:59,924 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:53:00,054 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/fibonacci.wvr.c[2356,2369] [2024-01-31 16:53:00,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:53:00,080 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:53:00,096 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/fibonacci.wvr.c[2356,2369] [2024-01-31 16:53:00,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:53:00,111 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:53:00,111 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:53:00 WrapperNode [2024-01-31 16:53:00,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:53:00,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:53:00,112 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:53:00,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:53:00,118 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,124 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,154 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 172 [2024-01-31 16:53:00,154 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:53:00,155 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:53:00,155 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:53:00,155 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:53:00,169 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,169 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,176 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,201 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 16:53:00,202 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,202 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,206 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,222 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,224 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,225 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,227 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:53:00,227 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:53:00,227 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:53:00,228 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:53:00,228 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 04:53:00" (1/1) ... [2024-01-31 16:53:00,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:53:00,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:00,258 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 16:53:00,261 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 16:53:00,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:53:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:53:00,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:53:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:53:00,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:53:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:53:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:53:00,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:53:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:53:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:53:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:53:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:53:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:53:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:53:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:53:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:53:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:53:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:53:00,289 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 16:53:00,396 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:53:00,398 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:53:00,600 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:53:00,600 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:53:00,822 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:53:00,822 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:53:00,824 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:53:00 BoogieIcfgContainer [2024-01-31 16:53:00,824 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:53:00,826 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:53:00,826 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:53:00,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:53:00,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:52:59" (1/4) ... [2024-01-31 16:53:00,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707328d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:53:00, skipping insertion in model container [2024-01-31 16:53:00,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:52:59" (2/4) ... [2024-01-31 16:53:00,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707328d4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:53:00, skipping insertion in model container [2024-01-31 16:53:00,830 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 04:53:00" (3/4) ... [2024-01-31 16:53:00,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707328d4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:53:00, skipping insertion in model container [2024-01-31 16:53:00,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:53:00" (4/4) ... [2024-01-31 16:53:00,833 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2024-01-31 16:53:00,846 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:53:00,846 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 16:53:00,846 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:53:00,881 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:53:00,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 52 flow [2024-01-31 16:53:00,943 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-01-31 16:53:00,943 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:53:00,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 2/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-31 16:53:00,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 52 flow [2024-01-31 16:53:00,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 44 flow [2024-01-31 16:53:00,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:53:00,967 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;@39a19602, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:53:00,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 16:53:00,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:53:00,976 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2024-01-31 16:53:00,976 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:53:00,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:00,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:00,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:00,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:00,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1557504182, now seen corresponding path program 1 times [2024-01-31 16:53:00,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:00,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335494415] [2024-01-31 16:53:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:00,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:01,524 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 16:53:01,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:01,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335494415] [2024-01-31 16:53:01,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335494415] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:01,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:01,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:53:01,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584195095] [2024-01-31 16:53:01,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:01,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:53:01,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:53:01,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:53:01,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:01,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 16:53:01,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:01,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:01,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:01,756 INFO L124 PetriNetUnfolderBase]: 73/141 cut-off events. [2024-01-31 16:53:01,756 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-31 16:53:01,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 141 events. 73/141 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 392 event pairs, 15 based on Foata normal form. 1/110 useless extension candidates. Maximal degree in co-relation 222. Up to 79 conditions per place. [2024-01-31 16:53:01,760 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 28 selfloop transitions, 5 changer transitions 5/39 dead transitions. [2024-01-31 16:53:01,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 39 transitions, 184 flow [2024-01-31 16:53:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:53:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:53:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2024-01-31 16:53:01,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684210526315789 [2024-01-31 16:53:01,771 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 5 states and 54 transitions. [2024-01-31 16:53:01,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 39 transitions, 184 flow [2024-01-31 16:53:01,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:01,775 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 70 flow [2024-01-31 16:53:01,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2024-01-31 16:53:01,779 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2024-01-31 16:53:01,779 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 70 flow [2024-01-31 16:53:01,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 16:53:01,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:01,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:01,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:53:01,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:01,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:01,781 INFO L85 PathProgramCache]: Analyzing trace with hash -649624350, now seen corresponding path program 2 times [2024-01-31 16:53:01,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:01,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699519448] [2024-01-31 16:53:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:01,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:01,959 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 16:53:01,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:01,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699519448] [2024-01-31 16:53:01,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699519448] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:01,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:01,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:53:01,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675829664] [2024-01-31 16:53:01,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:01,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:53:01,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:53:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:53:01,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:01,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 16:53:01,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:01,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:01,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:02,105 INFO L124 PetriNetUnfolderBase]: 72/133 cut-off events. [2024-01-31 16:53:02,105 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-01-31 16:53:02,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 133 events. 72/133 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 366 event pairs, 11 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 355. Up to 79 conditions per place. [2024-01-31 16:53:02,108 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 26 selfloop transitions, 6 changer transitions 5/38 dead transitions. [2024-01-31 16:53:02,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 38 transitions, 194 flow [2024-01-31 16:53:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:53:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:53:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-01-31 16:53:02,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473684210526316 [2024-01-31 16:53:02,110 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 70 flow. Second operand 5 states and 52 transitions. [2024-01-31 16:53:02,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 38 transitions, 194 flow [2024-01-31 16:53:02,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 192 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:53:02,114 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 102 flow [2024-01-31 16:53:02,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2024-01-31 16:53:02,115 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2024-01-31 16:53:02,116 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 102 flow [2024-01-31 16:53:02,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 16:53:02,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:02,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:02,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:53:02,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:02,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:02,122 INFO L85 PathProgramCache]: Analyzing trace with hash -350354219, now seen corresponding path program 1 times [2024-01-31 16:53:02,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:02,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207500371] [2024-01-31 16:53:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:02,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:02,188 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 16:53:02,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:02,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207500371] [2024-01-31 16:53:02,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207500371] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:02,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:02,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:53:02,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264100773] [2024-01-31 16:53:02,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:02,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:53:02,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:02,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:53:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:53:02,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:02,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:02,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:02,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:02,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:02,276 INFO L124 PetriNetUnfolderBase]: 85/151 cut-off events. [2024-01-31 16:53:02,276 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-01-31 16:53:02,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 151 events. 85/151 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 427 event pairs, 28 based on Foata normal form. 4/145 useless extension candidates. Maximal degree in co-relation 484. Up to 112 conditions per place. [2024-01-31 16:53:02,280 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 25 selfloop transitions, 10 changer transitions 4/40 dead transitions. [2024-01-31 16:53:02,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 264 flow [2024-01-31 16:53:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:53:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:53:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-01-31 16:53:02,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2024-01-31 16:53:02,282 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 102 flow. Second operand 5 states and 47 transitions. [2024-01-31 16:53:02,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 264 flow [2024-01-31 16:53:02,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 250 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-31 16:53:02,285 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 170 flow [2024-01-31 16:53:02,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-01-31 16:53:02,286 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2024-01-31 16:53:02,287 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 170 flow [2024-01-31 16:53:02,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:02,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:02,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:02,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:53:02,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:02,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1011310153, now seen corresponding path program 2 times [2024-01-31 16:53:02,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:02,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817468856] [2024-01-31 16:53:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:02,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:02,352 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 16:53:02,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:02,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817468856] [2024-01-31 16:53:02,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817468856] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:02,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:02,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:53:02,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40019386] [2024-01-31 16:53:02,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:02,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:53:02,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:02,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:53:02,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:53:02,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:02,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:02,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:02,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:02,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:02,425 INFO L124 PetriNetUnfolderBase]: 89/166 cut-off events. [2024-01-31 16:53:02,425 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2024-01-31 16:53:02,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 166 events. 89/166 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 491 event pairs, 28 based on Foata normal form. 4/156 useless extension candidates. Maximal degree in co-relation 533. Up to 86 conditions per place. [2024-01-31 16:53:02,427 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 34 selfloop transitions, 7 changer transitions 6/48 dead transitions. [2024-01-31 16:53:02,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 334 flow [2024-01-31 16:53:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:53:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:53:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-01-31 16:53:02,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473684210526316 [2024-01-31 16:53:02,428 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 170 flow. Second operand 5 states and 52 transitions. [2024-01-31 16:53:02,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 334 flow [2024-01-31 16:53:02,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 313 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-31 16:53:02,430 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 169 flow [2024-01-31 16:53:02,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2024-01-31 16:53:02,431 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2024-01-31 16:53:02,431 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 169 flow [2024-01-31 16:53:02,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:02,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:02,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:02,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:53:02,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:02,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:02,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2137321987, now seen corresponding path program 3 times [2024-01-31 16:53:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:02,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628826540] [2024-01-31 16:53:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:02,474 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 16:53:02,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:02,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628826540] [2024-01-31 16:53:02,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628826540] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:02,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:02,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:53:02,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064534219] [2024-01-31 16:53:02,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:02,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:53:02,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:02,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:53:02,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:53:02,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:02,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:02,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:02,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:02,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:02,543 INFO L124 PetriNetUnfolderBase]: 96/175 cut-off events. [2024-01-31 16:53:02,544 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2024-01-31 16:53:02,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 175 events. 96/175 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 498 event pairs, 38 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 618. Up to 142 conditions per place. [2024-01-31 16:53:02,545 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 25 selfloop transitions, 12 changer transitions 5/43 dead transitions. [2024-01-31 16:53:02,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 43 transitions, 327 flow [2024-01-31 16:53:02,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:53:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:53:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-01-31 16:53:02,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2024-01-31 16:53:02,550 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 169 flow. Second operand 5 states and 47 transitions. [2024-01-31 16:53:02,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 43 transitions, 327 flow [2024-01-31 16:53:02,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:53:02,554 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 220 flow [2024-01-31 16:53:02,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-01-31 16:53:02,557 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2024-01-31 16:53:02,557 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 220 flow [2024-01-31 16:53:02,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:02,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:02,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:02,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:53:02,557 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:02,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash -840952734, now seen corresponding path program 1 times [2024-01-31 16:53:02,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:02,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363090781] [2024-01-31 16:53:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:02,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:02,616 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 16:53:02,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:02,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363090781] [2024-01-31 16:53:02,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363090781] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:02,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420564828] [2024-01-31 16:53:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:02,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:02,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:02,618 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 16:53:02,640 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 16:53:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:02,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 16:53:02,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:02,748 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 16:53:02,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:02,767 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 16:53:02,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420564828] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:02,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:02,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-01-31 16:53:02,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947650150] [2024-01-31 16:53:02,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:02,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:53:02,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:02,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:53:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:53:02,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:02,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 220 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 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 16:53:02,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:02,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:02,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:02,879 INFO L124 PetriNetUnfolderBase]: 100/175 cut-off events. [2024-01-31 16:53:02,879 INFO L125 PetriNetUnfolderBase]: For 243/243 co-relation queries the response was YES. [2024-01-31 16:53:02,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 175 events. 100/175 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 494 event pairs, 10 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 695. Up to 67 conditions per place. [2024-01-31 16:53:02,880 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 48 selfloop transitions, 14 changer transitions 0/63 dead transitions. [2024-01-31 16:53:02,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 63 transitions, 478 flow [2024-01-31 16:53:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:53:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:53:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2024-01-31 16:53:02,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2024-01-31 16:53:02,882 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 220 flow. Second operand 7 states and 70 transitions. [2024-01-31 16:53:02,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 63 transitions, 478 flow [2024-01-31 16:53:02,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 63 transitions, 423 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-01-31 16:53:02,884 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 251 flow [2024-01-31 16:53:02,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=251, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-01-31 16:53:02,884 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2024-01-31 16:53:02,885 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 251 flow [2024-01-31 16:53:02,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 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 16:53:02,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:02,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:02,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 16:53:03,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-31 16:53:03,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:03,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:03,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1139680562, now seen corresponding path program 2 times [2024-01-31 16:53:03,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:03,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850932884] [2024-01-31 16:53:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:03,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:03,137 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 16:53:03,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:03,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850932884] [2024-01-31 16:53:03,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850932884] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:03,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:03,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:53:03,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260120484] [2024-01-31 16:53:03,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:03,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:53:03,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:53:03,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:53:03,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:03,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:03,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:03,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:03,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:03,201 INFO L124 PetriNetUnfolderBase]: 101/187 cut-off events. [2024-01-31 16:53:03,202 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2024-01-31 16:53:03,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 187 events. 101/187 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 537 event pairs, 29 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 751. Up to 121 conditions per place. [2024-01-31 16:53:03,203 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 34 selfloop transitions, 13 changer transitions 3/51 dead transitions. [2024-01-31 16:53:03,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 408 flow [2024-01-31 16:53:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:53:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:53:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-01-31 16:53:03,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2024-01-31 16:53:03,204 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 251 flow. Second operand 5 states and 48 transitions. [2024-01-31 16:53:03,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 408 flow [2024-01-31 16:53:03,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 383 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-01-31 16:53:03,206 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 255 flow [2024-01-31 16:53:03,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2024-01-31 16:53:03,206 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2024-01-31 16:53:03,206 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 255 flow [2024-01-31 16:53:03,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:03,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:03,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:03,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:53:03,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:03,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:03,207 INFO L85 PathProgramCache]: Analyzing trace with hash 374240615, now seen corresponding path program 4 times [2024-01-31 16:53:03,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:03,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386352784] [2024-01-31 16:53:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:03,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:03,244 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 16:53:03,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:03,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386352784] [2024-01-31 16:53:03,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386352784] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:03,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757294549] [2024-01-31 16:53:03,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:03,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:03,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:03,246 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 16:53:03,268 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 16:53:03,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:03,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:03,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 16:53:03,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:03,338 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 16:53:03,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:03,355 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 16:53:03,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757294549] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:03,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:03,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-01-31 16:53:03,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057490086] [2024-01-31 16:53:03,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:03,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:53:03,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:03,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:53:03,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:53:03,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:03,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 255 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 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 16:53:03,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:03,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:03,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:03,468 INFO L124 PetriNetUnfolderBase]: 105/191 cut-off events. [2024-01-31 16:53:03,469 INFO L125 PetriNetUnfolderBase]: For 430/430 co-relation queries the response was YES. [2024-01-31 16:53:03,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 191 events. 105/191 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 543 event pairs, 12 based on Foata normal form. 4/179 useless extension candidates. Maximal degree in co-relation 773. Up to 67 conditions per place. [2024-01-31 16:53:03,470 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 43 selfloop transitions, 19 changer transitions 0/63 dead transitions. [2024-01-31 16:53:03,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 498 flow [2024-01-31 16:53:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:53:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:53:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2024-01-31 16:53:03,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49624060150375937 [2024-01-31 16:53:03,471 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 255 flow. Second operand 7 states and 66 transitions. [2024-01-31 16:53:03,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 498 flow [2024-01-31 16:53:03,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 464 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:03,474 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 309 flow [2024-01-31 16:53:03,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-01-31 16:53:03,475 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2024-01-31 16:53:03,475 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 309 flow [2024-01-31 16:53:03,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 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 16:53:03,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:03,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:03,489 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 16:53:03,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-01-31 16:53:03,687 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:03,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:03,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1357123344, now seen corresponding path program 3 times [2024-01-31 16:53:03,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:03,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63821728] [2024-01-31 16:53:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:03,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:03,728 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 16:53:03,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:03,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63821728] [2024-01-31 16:53:03,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63821728] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:03,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:03,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:53:03,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299608250] [2024-01-31 16:53:03,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:03,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:53:03,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:03,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:53:03,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:53:03,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:03,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:03,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:03,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:03,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:03,808 INFO L124 PetriNetUnfolderBase]: 113/205 cut-off events. [2024-01-31 16:53:03,808 INFO L125 PetriNetUnfolderBase]: For 599/599 co-relation queries the response was YES. [2024-01-31 16:53:03,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 205 events. 113/205 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 612 event pairs, 29 based on Foata normal form. 6/211 useless extension candidates. Maximal degree in co-relation 883. Up to 155 conditions per place. [2024-01-31 16:53:03,809 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 36 selfloop transitions, 16 changer transitions 0/53 dead transitions. [2024-01-31 16:53:03,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 465 flow [2024-01-31 16:53:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:53:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:53:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2024-01-31 16:53:03,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2024-01-31 16:53:03,811 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 309 flow. Second operand 5 states and 49 transitions. [2024-01-31 16:53:03,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 465 flow [2024-01-31 16:53:03,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 443 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-01-31 16:53:03,814 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 335 flow [2024-01-31 16:53:03,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-01-31 16:53:03,815 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2024-01-31 16:53:03,815 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 335 flow [2024-01-31 16:53:03,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:03,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:03,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:03,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:53:03,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:03,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash -315273018, now seen corresponding path program 4 times [2024-01-31 16:53:03,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:03,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745070123] [2024-01-31 16:53:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:03,878 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 16:53:03,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:03,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745070123] [2024-01-31 16:53:03,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745070123] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:03,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:03,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:53:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751051209] [2024-01-31 16:53:03,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:03,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:53:03,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:03,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:53:03,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:53:03,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:03,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 335 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:03,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:03,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:03,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:03,935 INFO L124 PetriNetUnfolderBase]: 112/206 cut-off events. [2024-01-31 16:53:03,935 INFO L125 PetriNetUnfolderBase]: For 570/570 co-relation queries the response was YES. [2024-01-31 16:53:03,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 206 events. 112/206 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 620 event pairs, 35 based on Foata normal form. 2/208 useless extension candidates. Maximal degree in co-relation 927. Up to 165 conditions per place. [2024-01-31 16:53:03,936 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 32 selfloop transitions, 14 changer transitions 2/49 dead transitions. [2024-01-31 16:53:03,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 456 flow [2024-01-31 16:53:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:53:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:53:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2024-01-31 16:53:03,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631578947368421 [2024-01-31 16:53:03,937 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 335 flow. Second operand 5 states and 44 transitions. [2024-01-31 16:53:03,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 456 flow [2024-01-31 16:53:03,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 420 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-01-31 16:53:03,939 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 314 flow [2024-01-31 16:53:03,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-01-31 16:53:03,939 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2024-01-31 16:53:03,939 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 314 flow [2024-01-31 16:53:03,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:03,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:03,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:03,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:53:03,940 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:03,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash -342368305, now seen corresponding path program 5 times [2024-01-31 16:53:03,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:03,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432456007] [2024-01-31 16:53:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:03,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:03,976 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 16:53:03,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:03,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432456007] [2024-01-31 16:53:03,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432456007] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:03,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:03,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:53:03,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956815165] [2024-01-31 16:53:03,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:03,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:53:03,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:03,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:53:03,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:53:03,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:03,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:03,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:03,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:03,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:04,026 INFO L124 PetriNetUnfolderBase]: 117/213 cut-off events. [2024-01-31 16:53:04,026 INFO L125 PetriNetUnfolderBase]: For 608/608 co-relation queries the response was YES. [2024-01-31 16:53:04,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 213 events. 117/213 cut-off events. For 608/608 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 635 event pairs, 35 based on Foata normal form. 4/217 useless extension candidates. Maximal degree in co-relation 933. Up to 169 conditions per place. [2024-01-31 16:53:04,028 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 35 selfloop transitions, 15 changer transitions 0/51 dead transitions. [2024-01-31 16:53:04,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 464 flow [2024-01-31 16:53:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:53:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:53:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2024-01-31 16:53:04,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4842105263157895 [2024-01-31 16:53:04,028 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 314 flow. Second operand 5 states and 46 transitions. [2024-01-31 16:53:04,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 464 flow [2024-01-31 16:53:04,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 434 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 16:53:04,030 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 325 flow [2024-01-31 16:53:04,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-01-31 16:53:04,031 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2024-01-31 16:53:04,031 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 325 flow [2024-01-31 16:53:04,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:04,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:04,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:04,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:53:04,031 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:04,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash 184207140, now seen corresponding path program 5 times [2024-01-31 16:53:04,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:04,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186481303] [2024-01-31 16:53:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:04,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:04,068 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 16:53:04,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:04,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186481303] [2024-01-31 16:53:04,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186481303] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:04,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356211485] [2024-01-31 16:53:04,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:04,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:04,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:04,069 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 16:53:04,095 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 16:53:04,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:04,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:04,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 16:53:04,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:04,160 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 16:53:04,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:04,175 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 16:53:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356211485] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:04,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:04,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-01-31 16:53:04,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507947768] [2024-01-31 16:53:04,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:04,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:04,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:04,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:04,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:04,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:04,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 325 flow. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:04,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:04,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:04,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:04,273 INFO L124 PetriNetUnfolderBase]: 111/207 cut-off events. [2024-01-31 16:53:04,273 INFO L125 PetriNetUnfolderBase]: For 604/604 co-relation queries the response was YES. [2024-01-31 16:53:04,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 207 events. 111/207 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 637 event pairs, 34 based on Foata normal form. 6/213 useless extension candidates. Maximal degree in co-relation 879. Up to 162 conditions per place. [2024-01-31 16:53:04,275 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 37 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2024-01-31 16:53:04,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 470 flow [2024-01-31 16:53:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:53:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:53:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2024-01-31 16:53:04,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-01-31 16:53:04,275 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 325 flow. Second operand 6 states and 54 transitions. [2024-01-31 16:53:04,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 470 flow [2024-01-31 16:53:04,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 434 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-01-31 16:53:04,277 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 329 flow [2024-01-31 16:53:04,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2024-01-31 16:53:04,278 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2024-01-31 16:53:04,278 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 329 flow [2024-01-31 16:53:04,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:04,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:04,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:04,291 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 16:53:04,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:04,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:04,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:04,490 INFO L85 PathProgramCache]: Analyzing trace with hash 941917518, now seen corresponding path program 6 times [2024-01-31 16:53:04,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:04,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332993145] [2024-01-31 16:53:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:04,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:04,526 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 16:53:04,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:04,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332993145] [2024-01-31 16:53:04,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332993145] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:53:04,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:53:04,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:53:04,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305531595] [2024-01-31 16:53:04,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:53:04,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:53:04,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:53:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:53:04,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:04,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:04,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:04,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:04,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:04,581 INFO L124 PetriNetUnfolderBase]: 107/194 cut-off events. [2024-01-31 16:53:04,581 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2024-01-31 16:53:04,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 194 events. 107/194 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 561 event pairs, 31 based on Foata normal form. 2/196 useless extension candidates. Maximal degree in co-relation 844. Up to 147 conditions per place. [2024-01-31 16:53:04,583 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 32 selfloop transitions, 14 changer transitions 2/49 dead transitions. [2024-01-31 16:53:04,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 444 flow [2024-01-31 16:53:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:53:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:53:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2024-01-31 16:53:04,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45263157894736844 [2024-01-31 16:53:04,584 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 329 flow. Second operand 5 states and 43 transitions. [2024-01-31 16:53:04,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 444 flow [2024-01-31 16:53:04,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 390 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:04,586 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 288 flow [2024-01-31 16:53:04,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2024-01-31 16:53:04,587 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2024-01-31 16:53:04,587 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 288 flow [2024-01-31 16:53:04,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 16:53:04,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:04,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:04,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:53:04,588 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:04,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash 909470417, now seen corresponding path program 6 times [2024-01-31 16:53:04,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:04,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948176360] [2024-01-31 16:53:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:04,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:04,638 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 16:53:04,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:04,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948176360] [2024-01-31 16:53:04,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948176360] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:04,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320802681] [2024-01-31 16:53:04,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:04,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:04,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:04,640 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 16:53:04,643 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 16:53:04,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:53:04,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:04,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 16:53:04,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:04,729 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 16:53:04,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:04,747 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 16:53:04,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320802681] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:04,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:04,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-01-31 16:53:04,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030272167] [2024-01-31 16:53:04,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:04,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:53:04,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:04,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:53:04,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:53:04,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:04,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 288 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:04,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:04,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:04,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:04,844 INFO L124 PetriNetUnfolderBase]: 102/180 cut-off events. [2024-01-31 16:53:04,845 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2024-01-31 16:53:04,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 180 events. 102/180 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 505 event pairs, 14 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 747. Up to 68 conditions per place. [2024-01-31 16:53:04,846 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 39 selfloop transitions, 25 changer transitions 0/65 dead transitions. [2024-01-31 16:53:04,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 518 flow [2024-01-31 16:53:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:04,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 79 transitions. [2024-01-31 16:53:04,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2024-01-31 16:53:04,847 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 288 flow. Second operand 10 states and 79 transitions. [2024-01-31 16:53:04,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 518 flow [2024-01-31 16:53:04,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 483 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:04,849 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 346 flow [2024-01-31 16:53:04,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=346, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-01-31 16:53:04,849 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2024-01-31 16:53:04,849 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 346 flow [2024-01-31 16:53:04,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:04,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:04,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:04,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:05,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:05,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:05,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:05,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1385418673, now seen corresponding path program 1 times [2024-01-31 16:53:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745350484] [2024-01-31 16:53:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:05,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:05,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745350484] [2024-01-31 16:53:05,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745350484] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378750199] [2024-01-31 16:53:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:05,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:05,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:05,208 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 16:53:05,233 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 16:53:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:05,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:53:05,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:05,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378750199] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:05,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:05,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 16:53:05,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401300801] [2024-01-31 16:53:05,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:05,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:53:05,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:53:05,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:53:05,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:05,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 346 flow. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:05,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:05,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:05,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:05,614 INFO L124 PetriNetUnfolderBase]: 153/279 cut-off events. [2024-01-31 16:53:05,614 INFO L125 PetriNetUnfolderBase]: For 515/515 co-relation queries the response was YES. [2024-01-31 16:53:05,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 279 events. 153/279 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 957 event pairs, 16 based on Foata normal form. 1/280 useless extension candidates. Maximal degree in co-relation 1162. Up to 171 conditions per place. [2024-01-31 16:53:05,615 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 60 selfloop transitions, 17 changer transitions 5/83 dead transitions. [2024-01-31 16:53:05,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 83 transitions, 684 flow [2024-01-31 16:53:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:53:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:53:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-01-31 16:53:05,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338345864661654 [2024-01-31 16:53:05,616 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 346 flow. Second operand 7 states and 71 transitions. [2024-01-31 16:53:05,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 83 transitions, 684 flow [2024-01-31 16:53:05,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 594 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:05,619 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 400 flow [2024-01-31 16:53:05,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=400, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-01-31 16:53:05,619 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2024-01-31 16:53:05,619 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 400 flow [2024-01-31 16:53:05,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:05,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:05,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:05,648 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 16:53:05,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:53:05,832 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:05,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1917540053, now seen corresponding path program 2 times [2024-01-31 16:53:05,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:05,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728526768] [2024-01-31 16:53:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:05,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:06,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:06,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728526768] [2024-01-31 16:53:06,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728526768] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:06,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514572351] [2024-01-31 16:53:06,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:06,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:06,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:06,032 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 16:53:06,064 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 16:53:06,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:06,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:53:06,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:06,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:06,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514572351] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:06,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:06,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-31 16:53:06,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25949741] [2024-01-31 16:53:06,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:06,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:06,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:06,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:06,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:06,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:06,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 400 flow. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 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 16:53:06,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:06,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:06,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:06,436 INFO L124 PetriNetUnfolderBase]: 158/288 cut-off events. [2024-01-31 16:53:06,436 INFO L125 PetriNetUnfolderBase]: For 677/677 co-relation queries the response was YES. [2024-01-31 16:53:06,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1288 conditions, 288 events. 158/288 cut-off events. For 677/677 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 995 event pairs, 18 based on Foata normal form. 1/289 useless extension candidates. Maximal degree in co-relation 1269. Up to 199 conditions per place. [2024-01-31 16:53:06,439 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 58 selfloop transitions, 18 changer transitions 5/82 dead transitions. [2024-01-31 16:53:06,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 677 flow [2024-01-31 16:53:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:53:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:53:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2024-01-31 16:53:06,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037593984962406 [2024-01-31 16:53:06,440 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 400 flow. Second operand 7 states and 67 transitions. [2024-01-31 16:53:06,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 677 flow [2024-01-31 16:53:06,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 627 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-01-31 16:53:06,444 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 460 flow [2024-01-31 16:53:06,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=460, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-01-31 16:53:06,445 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 44 predicate places. [2024-01-31 16:53:06,445 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 460 flow [2024-01-31 16:53:06,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 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 16:53:06,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:06,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:06,479 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 16:53:06,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 16:53:06,660 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:06,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash -896421401, now seen corresponding path program 3 times [2024-01-31 16:53:06,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:06,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117487284] [2024-01-31 16:53:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:06,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:06,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:06,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117487284] [2024-01-31 16:53:06,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117487284] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:06,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919621934] [2024-01-31 16:53:06,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:06,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:06,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:06,885 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 16:53:06,949 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 16:53:07,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:53:07,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:07,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:53:07,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:07,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:07,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919621934] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:07,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:07,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 16:53:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008962494] [2024-01-31 16:53:07,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:07,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:53:07,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:53:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:53:07,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:07,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 460 flow. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 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 16:53:07,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:07,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:07,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:07,366 INFO L124 PetriNetUnfolderBase]: 155/278 cut-off events. [2024-01-31 16:53:07,366 INFO L125 PetriNetUnfolderBase]: For 697/697 co-relation queries the response was YES. [2024-01-31 16:53:07,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 278 events. 155/278 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 957 event pairs, 16 based on Foata normal form. 1/279 useless extension candidates. Maximal degree in co-relation 1247. Up to 175 conditions per place. [2024-01-31 16:53:07,368 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 58 selfloop transitions, 20 changer transitions 5/84 dead transitions. [2024-01-31 16:53:07,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 712 flow [2024-01-31 16:53:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:53:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:53:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2024-01-31 16:53:07,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518796992481203 [2024-01-31 16:53:07,369 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 460 flow. Second operand 7 states and 69 transitions. [2024-01-31 16:53:07,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 712 flow [2024-01-31 16:53:07,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 680 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:07,373 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 504 flow [2024-01-31 16:53:07,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-01-31 16:53:07,373 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2024-01-31 16:53:07,373 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 504 flow [2024-01-31 16:53:07,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 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 16:53:07,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:07,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:07,389 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 16:53:07,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:07,585 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:07,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:07,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1354070643, now seen corresponding path program 4 times [2024-01-31 16:53:07,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:07,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422626016] [2024-01-31 16:53:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:07,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:07,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:07,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422626016] [2024-01-31 16:53:07,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422626016] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:07,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254682228] [2024-01-31 16:53:07,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:07,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:07,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:07,801 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 16:53:07,803 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 16:53:07,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:07,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:07,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:53:07,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:07,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:08,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254682228] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:08,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:08,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-31 16:53:08,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999591811] [2024-01-31 16:53:08,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:08,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:08,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:08,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 504 flow. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:08,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:08,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:08,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:08,161 INFO L124 PetriNetUnfolderBase]: 178/319 cut-off events. [2024-01-31 16:53:08,161 INFO L125 PetriNetUnfolderBase]: For 870/870 co-relation queries the response was YES. [2024-01-31 16:53:08,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 319 events. 178/319 cut-off events. For 870/870 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1148 event pairs, 18 based on Foata normal form. 1/320 useless extension candidates. Maximal degree in co-relation 1451. Up to 259 conditions per place. [2024-01-31 16:53:08,163 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 63 selfloop transitions, 19 changer transitions 5/88 dead transitions. [2024-01-31 16:53:08,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 88 transitions, 803 flow [2024-01-31 16:53:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:53:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:53:08,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 59 transitions. [2024-01-31 16:53:08,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44360902255639095 [2024-01-31 16:53:08,164 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 504 flow. Second operand 7 states and 59 transitions. [2024-01-31 16:53:08,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 88 transitions, 803 flow [2024-01-31 16:53:08,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 758 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:08,169 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 617 flow [2024-01-31 16:53:08,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=617, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2024-01-31 16:53:08,169 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2024-01-31 16:53:08,169 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 617 flow [2024-01-31 16:53:08,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:08,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:08,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:08,183 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 16:53:08,376 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,SelfDestructingSolverStorable17 [2024-01-31 16:53:08,376 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:08,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1346340245, now seen corresponding path program 5 times [2024-01-31 16:53:08,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:08,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121170442] [2024-01-31 16:53:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:08,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:08,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:08,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121170442] [2024-01-31 16:53:08,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121170442] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:08,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175030429] [2024-01-31 16:53:08,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:08,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:08,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:08,524 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 16:53:08,525 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 16:53:08,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:53:08,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:08,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:53:08,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:08,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:08,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175030429] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:08,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:08,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 16:53:08,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949673581] [2024-01-31 16:53:08,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:53:08,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:53:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:53:08,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:08,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 617 flow. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 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 16:53:08,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:08,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:08,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:08,902 INFO L124 PetriNetUnfolderBase]: 192/348 cut-off events. [2024-01-31 16:53:08,902 INFO L125 PetriNetUnfolderBase]: For 1087/1087 co-relation queries the response was YES. [2024-01-31 16:53:08,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1697 conditions, 348 events. 192/348 cut-off events. For 1087/1087 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1293 event pairs, 18 based on Foata normal form. 1/349 useless extension candidates. Maximal degree in co-relation 1671. Up to 263 conditions per place. [2024-01-31 16:53:08,905 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 71 selfloop transitions, 20 changer transitions 5/97 dead transitions. [2024-01-31 16:53:08,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 931 flow [2024-01-31 16:53:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:53:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:53:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 65 transitions. [2024-01-31 16:53:08,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48872180451127817 [2024-01-31 16:53:08,906 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 617 flow. Second operand 7 states and 65 transitions. [2024-01-31 16:53:08,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 931 flow [2024-01-31 16:53:08,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 900 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-01-31 16:53:08,913 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 696 flow [2024-01-31 16:53:08,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2024-01-31 16:53:08,914 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2024-01-31 16:53:08,914 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 696 flow [2024-01-31 16:53:08,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 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 16:53:08,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:08,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:08,927 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 16:53:09,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:09,120 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:09,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1230283345, now seen corresponding path program 6 times [2024-01-31 16:53:09,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:09,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77165461] [2024-01-31 16:53:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:09,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:09,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:09,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77165461] [2024-01-31 16:53:09,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77165461] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:09,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377808652] [2024-01-31 16:53:09,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:09,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:09,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:09,255 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 16:53:09,261 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 16:53:09,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:53:09,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:09,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:53:09,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:09,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:09,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377808652] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:09,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:09,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-31 16:53:09,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675270727] [2024-01-31 16:53:09,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:09,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:09,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:09,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 696 flow. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:09,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:09,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:09,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:09,589 INFO L124 PetriNetUnfolderBase]: 189/338 cut-off events. [2024-01-31 16:53:09,589 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2024-01-31 16:53:09,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1740 conditions, 338 events. 189/338 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1248 event pairs, 18 based on Foata normal form. 1/339 useless extension candidates. Maximal degree in co-relation 1711. Up to 263 conditions per place. [2024-01-31 16:53:09,592 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 69 selfloop transitions, 21 changer transitions 5/96 dead transitions. [2024-01-31 16:53:09,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 96 transitions, 974 flow [2024-01-31 16:53:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:53:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:53:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2024-01-31 16:53:09,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-01-31 16:53:09,593 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 696 flow. Second operand 7 states and 63 transitions. [2024-01-31 16:53:09,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 96 transitions, 974 flow [2024-01-31 16:53:09,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 96 transitions, 910 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-01-31 16:53:09,598 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 726 flow [2024-01-31 16:53:09,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2024-01-31 16:53:09,599 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 64 predicate places. [2024-01-31 16:53:09,599 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 726 flow [2024-01-31 16:53:09,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:09,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:09,599 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:09,627 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 16:53:09,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:09,808 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:09,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash 684156866, now seen corresponding path program 7 times [2024-01-31 16:53:09,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:09,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942135886] [2024-01-31 16:53:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:09,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:09,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:09,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942135886] [2024-01-31 16:53:09,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942135886] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:09,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34579283] [2024-01-31 16:53:09,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:09,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:09,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:09,863 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 16:53:09,864 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 16:53:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:09,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:09,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:09,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:10,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34579283] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:10,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:10,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-01-31 16:53:10,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095502001] [2024-01-31 16:53:10,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:10,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:53:10,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:10,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:53:10,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:53:10,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:10,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 726 flow. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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 16:53:10,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:10,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:10,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:10,132 INFO L124 PetriNetUnfolderBase]: 206/373 cut-off events. [2024-01-31 16:53:10,132 INFO L125 PetriNetUnfolderBase]: For 1577/1577 co-relation queries the response was YES. [2024-01-31 16:53:10,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 373 events. 206/373 cut-off events. For 1577/1577 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1443 event pairs, 33 based on Foata normal form. 4/377 useless extension candidates. Maximal degree in co-relation 1905. Up to 141 conditions per place. [2024-01-31 16:53:10,135 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 69 selfloop transitions, 33 changer transitions 10/113 dead transitions. [2024-01-31 16:53:10,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 1158 flow [2024-01-31 16:53:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:53:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:53:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2024-01-31 16:53:10,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518796992481203 [2024-01-31 16:53:10,137 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 726 flow. Second operand 7 states and 69 transitions. [2024-01-31 16:53:10,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 1158 flow [2024-01-31 16:53:10,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 113 transitions, 1095 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:10,144 INFO L231 Difference]: Finished difference. Result has 90 places, 83 transitions, 806 flow [2024-01-31 16:53:10,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=806, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2024-01-31 16:53:10,144 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2024-01-31 16:53:10,144 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 806 flow [2024-01-31 16:53:10,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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 16:53:10,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:10,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:10,156 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 16:53:10,356 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,SelfDestructingSolverStorable20 [2024-01-31 16:53:10,356 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:10,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash -736980951, now seen corresponding path program 8 times [2024-01-31 16:53:10,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:10,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782584555] [2024-01-31 16:53:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:10,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:10,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:10,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782584555] [2024-01-31 16:53:10,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782584555] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:10,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533836240] [2024-01-31 16:53:10,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:10,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:10,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:10,414 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 16:53:10,415 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 16:53:10,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:10,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:10,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:10,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:10,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:10,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533836240] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:10,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:10,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:53:10,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061802826] [2024-01-31 16:53:10,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:10,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:53:10,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:10,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:53:10,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:53:10,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:10,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 83 transitions, 806 flow. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 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 16:53:10,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:10,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:10,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:10,799 INFO L124 PetriNetUnfolderBase]: 237/422 cut-off events. [2024-01-31 16:53:10,800 INFO L125 PetriNetUnfolderBase]: For 2406/2406 co-relation queries the response was YES. [2024-01-31 16:53:10,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2341 conditions, 422 events. 237/422 cut-off events. For 2406/2406 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1642 event pairs, 32 based on Foata normal form. 20/442 useless extension candidates. Maximal degree in co-relation 2306. Up to 172 conditions per place. [2024-01-31 16:53:10,803 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 84 selfloop transitions, 50 changer transitions 0/135 dead transitions. [2024-01-31 16:53:10,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1461 flow [2024-01-31 16:53:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:53:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:53:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 117 transitions. [2024-01-31 16:53:10,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398496240601504 [2024-01-31 16:53:10,804 INFO L175 Difference]: Start difference. First operand has 90 places, 83 transitions, 806 flow. Second operand 14 states and 117 transitions. [2024-01-31 16:53:10,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1461 flow [2024-01-31 16:53:10,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 1397 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:10,812 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 1161 flow [2024-01-31 16:53:10,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1161, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2024-01-31 16:53:10,812 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2024-01-31 16:53:10,812 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 1161 flow [2024-01-31 16:53:10,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 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 16:53:10,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:10,813 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:10,824 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 16:53:11,023 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,SelfDestructingSolverStorable21 [2024-01-31 16:53:11,024 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:11,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:11,025 INFO L85 PathProgramCache]: Analyzing trace with hash -32468913, now seen corresponding path program 9 times [2024-01-31 16:53:11,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:11,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262153983] [2024-01-31 16:53:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:11,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:11,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262153983] [2024-01-31 16:53:11,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262153983] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935785930] [2024-01-31 16:53:11,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:11,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:11,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:11,085 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 16:53:11,100 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 16:53:11,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:53:11,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:11,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:11,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:11,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:11,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935785930] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:11,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:11,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-01-31 16:53:11,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325687781] [2024-01-31 16:53:11,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:11,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:53:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:53:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:53:11,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:11,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 1161 flow. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:11,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:11,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:11,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:11,404 INFO L124 PetriNetUnfolderBase]: 274/485 cut-off events. [2024-01-31 16:53:11,404 INFO L125 PetriNetUnfolderBase]: For 4393/4393 co-relation queries the response was YES. [2024-01-31 16:53:11,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3068 conditions, 485 events. 274/485 cut-off events. For 4393/4393 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1936 event pairs, 26 based on Foata normal form. 6/491 useless extension candidates. Maximal degree in co-relation 3026. Up to 151 conditions per place. [2024-01-31 16:53:11,409 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 94 selfloop transitions, 60 changer transitions 0/155 dead transitions. [2024-01-31 16:53:11,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 155 transitions, 1978 flow [2024-01-31 16:53:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-01-31 16:53:11,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2024-01-31 16:53:11,410 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 1161 flow. Second operand 10 states and 94 transitions. [2024-01-31 16:53:11,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 155 transitions, 1978 flow [2024-01-31 16:53:11,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 155 transitions, 1645 flow, removed 143 selfloop flow, removed 2 redundant places. [2024-01-31 16:53:11,424 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 1272 flow [2024-01-31 16:53:11,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1272, PETRI_PLACES=118, PETRI_TRANSITIONS=118} [2024-01-31 16:53:11,425 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 97 predicate places. [2024-01-31 16:53:11,425 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 1272 flow [2024-01-31 16:53:11,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:11,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:11,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:11,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:11,639 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,SelfDestructingSolverStorable22 [2024-01-31 16:53:11,639 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:11,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1256114259, now seen corresponding path program 10 times [2024-01-31 16:53:11,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:11,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909228236] [2024-01-31 16:53:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:11,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:11,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:11,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909228236] [2024-01-31 16:53:11,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909228236] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:11,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400721640] [2024-01-31 16:53:11,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:11,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:11,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:11,692 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 16:53:11,719 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 16:53:11,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:11,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:11,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:11,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:11,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:11,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400721640] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:11,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:11,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 16:53:11,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993575556] [2024-01-31 16:53:11,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:11,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:11,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:11,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:11,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:11,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:11,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 1272 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 16:53:11,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:11,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:11,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:12,025 INFO L124 PetriNetUnfolderBase]: 320/551 cut-off events. [2024-01-31 16:53:12,026 INFO L125 PetriNetUnfolderBase]: For 5564/5564 co-relation queries the response was YES. [2024-01-31 16:53:12,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3544 conditions, 551 events. 320/551 cut-off events. For 5564/5564 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2235 event pairs, 46 based on Foata normal form. 6/557 useless extension candidates. Maximal degree in co-relation 3496. Up to 258 conditions per place. [2024-01-31 16:53:12,030 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 84 selfloop transitions, 82 changer transitions 2/169 dead transitions. [2024-01-31 16:53:12,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 169 transitions, 2261 flow [2024-01-31 16:53:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:53:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:53:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 104 transitions. [2024-01-31 16:53:12,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-01-31 16:53:12,031 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 1272 flow. Second operand 13 states and 104 transitions. [2024-01-31 16:53:12,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 169 transitions, 2261 flow [2024-01-31 16:53:12,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 169 transitions, 2095 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:12,049 INFO L231 Difference]: Finished difference. Result has 131 places, 145 transitions, 1849 flow [2024-01-31 16:53:12,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1849, PETRI_PLACES=131, PETRI_TRANSITIONS=145} [2024-01-31 16:53:12,050 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 110 predicate places. [2024-01-31 16:53:12,050 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 145 transitions, 1849 flow [2024-01-31 16:53:12,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 16:53:12,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:12,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:12,064 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 16:53:12,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:12,260 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:12,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1709308380, now seen corresponding path program 11 times [2024-01-31 16:53:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:12,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638757534] [2024-01-31 16:53:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:12,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:12,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:12,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638757534] [2024-01-31 16:53:12,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638757534] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:12,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262898501] [2024-01-31 16:53:12,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:12,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:12,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:12,311 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 16:53:12,336 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 16:53:12,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:12,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:12,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:12,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:12,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:12,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262898501] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:12,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:12,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:53:12,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295039994] [2024-01-31 16:53:12,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:12,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:53:12,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:12,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:53:12,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:53:12,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:12,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 145 transitions, 1849 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 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 16:53:12,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:12,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:12,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:12,641 INFO L124 PetriNetUnfolderBase]: 345/592 cut-off events. [2024-01-31 16:53:12,641 INFO L125 PetriNetUnfolderBase]: For 7816/7816 co-relation queries the response was YES. [2024-01-31 16:53:12,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4079 conditions, 592 events. 345/592 cut-off events. For 7816/7816 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2435 event pairs, 67 based on Foata normal form. 8/600 useless extension candidates. Maximal degree in co-relation 4027. Up to 391 conditions per place. [2024-01-31 16:53:12,646 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 123 selfloop transitions, 54 changer transitions 7/185 dead transitions. [2024-01-31 16:53:12,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 185 transitions, 2600 flow [2024-01-31 16:53:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 93 transitions. [2024-01-31 16:53:12,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4449760765550239 [2024-01-31 16:53:12,647 INFO L175 Difference]: Start difference. First operand has 131 places, 145 transitions, 1849 flow. Second operand 11 states and 93 transitions. [2024-01-31 16:53:12,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 185 transitions, 2600 flow [2024-01-31 16:53:12,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 185 transitions, 2255 flow, removed 166 selfloop flow, removed 2 redundant places. [2024-01-31 16:53:12,673 INFO L231 Difference]: Finished difference. Result has 143 places, 155 transitions, 1869 flow [2024-01-31 16:53:12,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1869, PETRI_PLACES=143, PETRI_TRANSITIONS=155} [2024-01-31 16:53:12,674 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2024-01-31 16:53:12,674 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 155 transitions, 1869 flow [2024-01-31 16:53:12,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 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 16:53:12,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:12,674 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:12,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:12,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:12,885 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:12,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1913489791, now seen corresponding path program 12 times [2024-01-31 16:53:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:12,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172705493] [2024-01-31 16:53:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:12,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:12,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:12,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172705493] [2024-01-31 16:53:12,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172705493] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:12,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691580207] [2024-01-31 16:53:12,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:12,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:12,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:12,952 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 16:53:12,972 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 16:53:13,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:53:13,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:13,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:13,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:13,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:13,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691580207] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:13,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:13,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 16:53:13,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191274600] [2024-01-31 16:53:13,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:13,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:13,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:13,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:13,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 155 transitions, 1869 flow. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 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 16:53:13,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:13,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:13,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:13,354 INFO L124 PetriNetUnfolderBase]: 347/604 cut-off events. [2024-01-31 16:53:13,354 INFO L125 PetriNetUnfolderBase]: For 6155/6155 co-relation queries the response was YES. [2024-01-31 16:53:13,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3904 conditions, 604 events. 347/604 cut-off events. For 6155/6155 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2502 event pairs, 38 based on Foata normal form. 14/618 useless extension candidates. Maximal degree in co-relation 3847. Up to 246 conditions per place. [2024-01-31 16:53:13,358 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 90 selfloop transitions, 94 changer transitions 0/185 dead transitions. [2024-01-31 16:53:13,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 185 transitions, 2400 flow [2024-01-31 16:53:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:53:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:53:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 128 transitions. [2024-01-31 16:53:13,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-01-31 16:53:13,359 INFO L175 Difference]: Start difference. First operand has 143 places, 155 transitions, 1869 flow. Second operand 16 states and 128 transitions. [2024-01-31 16:53:13,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 185 transitions, 2400 flow [2024-01-31 16:53:13,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 185 transitions, 2195 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:13,378 INFO L231 Difference]: Finished difference. Result has 151 places, 158 transitions, 1918 flow [2024-01-31 16:53:13,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1918, PETRI_PLACES=151, PETRI_TRANSITIONS=158} [2024-01-31 16:53:13,378 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 130 predicate places. [2024-01-31 16:53:13,378 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 158 transitions, 1918 flow [2024-01-31 16:53:13,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 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 16:53:13,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:13,379 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:13,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:13,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-31 16:53:13,582 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:13,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:13,582 INFO L85 PathProgramCache]: Analyzing trace with hash -517185788, now seen corresponding path program 13 times [2024-01-31 16:53:13,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:13,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940893723] [2024-01-31 16:53:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:13,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:13,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:13,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940893723] [2024-01-31 16:53:13,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940893723] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:13,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854439731] [2024-01-31 16:53:13,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:13,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:13,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:13,653 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:13,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 16:53:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:13,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:13,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:13,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:13,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854439731] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:13,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:13,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 16:53:13,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390724447] [2024-01-31 16:53:13,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:13,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:13,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:13,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 158 transitions, 1918 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:13,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:13,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:13,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:14,014 INFO L124 PetriNetUnfolderBase]: 376/645 cut-off events. [2024-01-31 16:53:14,014 INFO L125 PetriNetUnfolderBase]: For 6186/6186 co-relation queries the response was YES. [2024-01-31 16:53:14,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4254 conditions, 645 events. 376/645 cut-off events. For 6186/6186 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2679 event pairs, 77 based on Foata normal form. 8/653 useless extension candidates. Maximal degree in co-relation 4197. Up to 461 conditions per place. [2024-01-31 16:53:14,024 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 130 selfloop transitions, 71 changer transitions 0/202 dead transitions. [2024-01-31 16:53:14,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 2689 flow [2024-01-31 16:53:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:53:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:53:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 130 transitions. [2024-01-31 16:53:14,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024767801857585 [2024-01-31 16:53:14,026 INFO L175 Difference]: Start difference. First operand has 151 places, 158 transitions, 1918 flow. Second operand 17 states and 130 transitions. [2024-01-31 16:53:14,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 2689 flow [2024-01-31 16:53:14,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 202 transitions, 2477 flow, removed 29 selfloop flow, removed 12 redundant places. [2024-01-31 16:53:14,049 INFO L231 Difference]: Finished difference. Result has 159 places, 178 transitions, 2194 flow [2024-01-31 16:53:14,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2194, PETRI_PLACES=159, PETRI_TRANSITIONS=178} [2024-01-31 16:53:14,050 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 138 predicate places. [2024-01-31 16:53:14,050 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 178 transitions, 2194 flow [2024-01-31 16:53:14,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:14,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:14,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:14,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:14,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 16:53:14,264 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:14,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -702329636, now seen corresponding path program 14 times [2024-01-31 16:53:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:14,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122532416] [2024-01-31 16:53:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:14,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122532416] [2024-01-31 16:53:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122532416] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395615668] [2024-01-31 16:53:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:14,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:14,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:14,321 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:14,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 16:53:14,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:14,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:14,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:14,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:14,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:14,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395615668] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:14,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:14,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 16:53:14,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61073526] [2024-01-31 16:53:14,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:14,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:14,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:14,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:14,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 178 transitions, 2194 flow. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 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 16:53:14,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:14,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:14,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:14,681 INFO L124 PetriNetUnfolderBase]: 368/637 cut-off events. [2024-01-31 16:53:14,682 INFO L125 PetriNetUnfolderBase]: For 6314/6314 co-relation queries the response was YES. [2024-01-31 16:53:14,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4297 conditions, 637 events. 368/637 cut-off events. For 6314/6314 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2669 event pairs, 71 based on Foata normal form. 12/649 useless extension candidates. Maximal degree in co-relation 4237. Up to 439 conditions per place. [2024-01-31 16:53:14,687 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 129 selfloop transitions, 64 changer transitions 5/199 dead transitions. [2024-01-31 16:53:14,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 199 transitions, 2701 flow [2024-01-31 16:53:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:53:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:53:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 100 transitions. [2024-01-31 16:53:14,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2024-01-31 16:53:14,688 INFO L175 Difference]: Start difference. First operand has 159 places, 178 transitions, 2194 flow. Second operand 12 states and 100 transitions. [2024-01-31 16:53:14,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 199 transitions, 2701 flow [2024-01-31 16:53:14,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 199 transitions, 2406 flow, removed 93 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:14,709 INFO L231 Difference]: Finished difference. Result has 160 places, 174 transitions, 1997 flow [2024-01-31 16:53:14,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1997, PETRI_PLACES=160, PETRI_TRANSITIONS=174} [2024-01-31 16:53:14,710 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2024-01-31 16:53:14,710 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 174 transitions, 1997 flow [2024-01-31 16:53:14,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 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 16:53:14,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:14,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:14,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:14,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-31 16:53:14,923 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:14,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1588532495, now seen corresponding path program 15 times [2024-01-31 16:53:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:14,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545016488] [2024-01-31 16:53:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:14,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:14,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:14,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545016488] [2024-01-31 16:53:14,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545016488] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:14,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219678874] [2024-01-31 16:53:14,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:14,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:14,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:14,989 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:15,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 16:53:15,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:53:15,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:15,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:15,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:15,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:15,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219678874] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:15,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:15,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 16:53:15,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59555361] [2024-01-31 16:53:15,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:15,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:53:15,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:53:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:53:15,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:15,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 174 transitions, 1997 flow. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 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 16:53:15,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:15,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:15,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:15,361 INFO L124 PetriNetUnfolderBase]: 417/704 cut-off events. [2024-01-31 16:53:15,362 INFO L125 PetriNetUnfolderBase]: For 6330/6330 co-relation queries the response was YES. [2024-01-31 16:53:15,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4637 conditions, 704 events. 417/704 cut-off events. For 6330/6330 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2950 event pairs, 50 based on Foata normal form. 8/712 useless extension candidates. Maximal degree in co-relation 4577. Up to 304 conditions per place. [2024-01-31 16:53:15,368 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 104 selfloop transitions, 115 changer transitions 5/225 dead transitions. [2024-01-31 16:53:15,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 225 transitions, 2955 flow [2024-01-31 16:53:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:53:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:53:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 119 transitions. [2024-01-31 16:53:15,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39144736842105265 [2024-01-31 16:53:15,369 INFO L175 Difference]: Start difference. First operand has 160 places, 174 transitions, 1997 flow. Second operand 16 states and 119 transitions. [2024-01-31 16:53:15,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 225 transitions, 2955 flow [2024-01-31 16:53:15,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 225 transitions, 2750 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:15,391 INFO L231 Difference]: Finished difference. Result has 168 places, 198 transitions, 2458 flow [2024-01-31 16:53:15,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2458, PETRI_PLACES=168, PETRI_TRANSITIONS=198} [2024-01-31 16:53:15,392 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 147 predicate places. [2024-01-31 16:53:15,392 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 198 transitions, 2458 flow [2024-01-31 16:53:15,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 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 16:53:15,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:15,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:15,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:15,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 16:53:15,606 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:15,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1830225827, now seen corresponding path program 16 times [2024-01-31 16:53:15,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:15,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959262011] [2024-01-31 16:53:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:15,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:15,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959262011] [2024-01-31 16:53:15,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959262011] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:15,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012919498] [2024-01-31 16:53:15,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:15,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:15,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:15,675 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:15,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 16:53:15,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:15,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:15,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:15,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:15,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:15,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012919498] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:15,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:15,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 16:53:15,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883201534] [2024-01-31 16:53:15,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:15,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:53:15,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:53:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:53:15,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:15,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 198 transitions, 2458 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 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 16:53:15,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:15,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:15,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:16,185 INFO L124 PetriNetUnfolderBase]: 573/970 cut-off events. [2024-01-31 16:53:16,186 INFO L125 PetriNetUnfolderBase]: For 10296/10296 co-relation queries the response was YES. [2024-01-31 16:53:16,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6559 conditions, 970 events. 573/970 cut-off events. For 10296/10296 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4414 event pairs, 37 based on Foata normal form. 10/980 useless extension candidates. Maximal degree in co-relation 6495. Up to 299 conditions per place. [2024-01-31 16:53:16,194 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 148 selfloop transitions, 161 changer transitions 0/310 dead transitions. [2024-01-31 16:53:16,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 310 transitions, 4209 flow [2024-01-31 16:53:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:53:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:53:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 175 transitions. [2024-01-31 16:53:16,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40045766590389015 [2024-01-31 16:53:16,196 INFO L175 Difference]: Start difference. First operand has 168 places, 198 transitions, 2458 flow. Second operand 23 states and 175 transitions. [2024-01-31 16:53:16,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 310 transitions, 4209 flow [2024-01-31 16:53:16,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 310 transitions, 3954 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-01-31 16:53:16,230 INFO L231 Difference]: Finished difference. Result has 186 places, 268 transitions, 3618 flow [2024-01-31 16:53:16,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3618, PETRI_PLACES=186, PETRI_TRANSITIONS=268} [2024-01-31 16:53:16,230 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2024-01-31 16:53:16,230 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 268 transitions, 3618 flow [2024-01-31 16:53:16,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 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 16:53:16,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:16,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:16,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:16,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:16,442 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:16,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:16,442 INFO L85 PathProgramCache]: Analyzing trace with hash 324636623, now seen corresponding path program 17 times [2024-01-31 16:53:16,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:16,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788222827] [2024-01-31 16:53:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:16,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:16,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:16,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788222827] [2024-01-31 16:53:16,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788222827] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:16,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683527654] [2024-01-31 16:53:16,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:16,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:16,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:16,500 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:16,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 16:53:16,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:53:16,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:16,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:16,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:16,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:16,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683527654] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:16,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:16,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-31 16:53:16,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799312752] [2024-01-31 16:53:16,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:16,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:53:16,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:53:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:53:16,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:16,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 268 transitions, 3618 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 16:53:16,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:16,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:16,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:16,963 INFO L124 PetriNetUnfolderBase]: 636/1069 cut-off events. [2024-01-31 16:53:16,964 INFO L125 PetriNetUnfolderBase]: For 14581/14581 co-relation queries the response was YES. [2024-01-31 16:53:16,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7870 conditions, 1069 events. 636/1069 cut-off events. For 14581/14581 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4953 event pairs, 44 based on Foata normal form. 16/1085 useless extension candidates. Maximal degree in co-relation 7801. Up to 394 conditions per place. [2024-01-31 16:53:16,972 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 113 selfloop transitions, 213 changer transitions 0/327 dead transitions. [2024-01-31 16:53:16,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 327 transitions, 4939 flow [2024-01-31 16:53:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:53:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:53:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 135 transitions. [2024-01-31 16:53:16,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4179566563467492 [2024-01-31 16:53:16,973 INFO L175 Difference]: Start difference. First operand has 186 places, 268 transitions, 3618 flow. Second operand 17 states and 135 transitions. [2024-01-31 16:53:16,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 327 transitions, 4939 flow [2024-01-31 16:53:17,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 327 transitions, 4664 flow, removed 103 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:17,015 INFO L231 Difference]: Finished difference. Result has 197 places, 299 transitions, 4517 flow [2024-01-31 16:53:17,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4517, PETRI_PLACES=197, PETRI_TRANSITIONS=299} [2024-01-31 16:53:17,015 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 176 predicate places. [2024-01-31 16:53:17,015 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 299 transitions, 4517 flow [2024-01-31 16:53:17,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 16:53:17,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:17,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:17,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:17,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:17,221 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:17,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:17,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2010054401, now seen corresponding path program 18 times [2024-01-31 16:53:17,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:17,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854700880] [2024-01-31 16:53:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:17,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:17,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:17,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854700880] [2024-01-31 16:53:17,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854700880] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:17,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557801624] [2024-01-31 16:53:17,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:17,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:17,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:17,279 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:17,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 16:53:17,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:53:17,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:17,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:17,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:17,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:17,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557801624] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:17,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:17,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 16:53:17,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282376490] [2024-01-31 16:53:17,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:17,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:53:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:17,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:53:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:53:17,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:17,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 299 transitions, 4517 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 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 16:53:17,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:17,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:17,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:17,774 INFO L124 PetriNetUnfolderBase]: 685/1148 cut-off events. [2024-01-31 16:53:17,774 INFO L125 PetriNetUnfolderBase]: For 20281/20281 co-relation queries the response was YES. [2024-01-31 16:53:17,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9283 conditions, 1148 events. 685/1148 cut-off events. For 20281/20281 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5385 event pairs, 150 based on Foata normal form. 28/1176 useless extension candidates. Maximal degree in co-relation 9209. Up to 984 conditions per place. [2024-01-31 16:53:17,783 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 299 selfloop transitions, 59 changer transitions 0/359 dead transitions. [2024-01-31 16:53:17,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 359 transitions, 6047 flow [2024-01-31 16:53:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:53:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:53:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 153 transitions. [2024-01-31 16:53:17,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42382271468144045 [2024-01-31 16:53:17,784 INFO L175 Difference]: Start difference. First operand has 197 places, 299 transitions, 4517 flow. Second operand 19 states and 153 transitions. [2024-01-31 16:53:17,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 359 transitions, 6047 flow [2024-01-31 16:53:17,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 359 transitions, 5796 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:17,849 INFO L231 Difference]: Finished difference. Result has 221 places, 324 transitions, 5078 flow [2024-01-31 16:53:17,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5078, PETRI_PLACES=221, PETRI_TRANSITIONS=324} [2024-01-31 16:53:17,849 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2024-01-31 16:53:17,849 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 324 transitions, 5078 flow [2024-01-31 16:53:17,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 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 16:53:17,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:17,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:17,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:18,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:18,050 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:18,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash -99464403, now seen corresponding path program 19 times [2024-01-31 16:53:18,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:18,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972290117] [2024-01-31 16:53:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:18,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:18,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:18,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972290117] [2024-01-31 16:53:18,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972290117] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:18,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484689239] [2024-01-31 16:53:18,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:18,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:18,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:18,144 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:18,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 16:53:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:18,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:18,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:18,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484689239] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:18,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:18,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 16:53:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611246888] [2024-01-31 16:53:18,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:18,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:18,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 324 transitions, 5078 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:18,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:18,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:18,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:18,639 INFO L124 PetriNetUnfolderBase]: 738/1231 cut-off events. [2024-01-31 16:53:18,639 INFO L125 PetriNetUnfolderBase]: For 28034/28034 co-relation queries the response was YES. [2024-01-31 16:53:18,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10538 conditions, 1231 events. 738/1231 cut-off events. For 28034/28034 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5876 event pairs, 85 based on Foata normal form. 12/1243 useless extension candidates. Maximal degree in co-relation 10451. Up to 743 conditions per place. [2024-01-31 16:53:18,649 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 234 selfloop transitions, 148 changer transitions 0/383 dead transitions. [2024-01-31 16:53:18,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 383 transitions, 6813 flow [2024-01-31 16:53:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:53:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:53:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 139 transitions. [2024-01-31 16:53:18,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034055727554177 [2024-01-31 16:53:18,652 INFO L175 Difference]: Start difference. First operand has 221 places, 324 transitions, 5078 flow. Second operand 17 states and 139 transitions. [2024-01-31 16:53:18,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 383 transitions, 6813 flow [2024-01-31 16:53:18,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 383 transitions, 6126 flow, removed 317 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:18,734 INFO L231 Difference]: Finished difference. Result has 233 places, 350 transitions, 5528 flow [2024-01-31 16:53:18,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5528, PETRI_PLACES=233, PETRI_TRANSITIONS=350} [2024-01-31 16:53:18,735 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2024-01-31 16:53:18,736 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 350 transitions, 5528 flow [2024-01-31 16:53:18,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:18,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:18,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:18,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:18,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:18,946 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:18,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:18,947 INFO L85 PathProgramCache]: Analyzing trace with hash -658929525, now seen corresponding path program 20 times [2024-01-31 16:53:18,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:18,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344001692] [2024-01-31 16:53:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:18,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:19,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:19,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344001692] [2024-01-31 16:53:19,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344001692] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:19,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130676788] [2024-01-31 16:53:19,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:19,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:19,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:19,003 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:19,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 16:53:19,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:19,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:19,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:19,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:19,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:19,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130676788] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:19,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:19,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:53:19,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141150933] [2024-01-31 16:53:19,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:19,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:53:19,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:19,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:53:19,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:53:19,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:19,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 350 transitions, 5528 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 16:53:19,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:19,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:19,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:19,470 INFO L124 PetriNetUnfolderBase]: 739/1238 cut-off events. [2024-01-31 16:53:19,470 INFO L125 PetriNetUnfolderBase]: For 27609/27609 co-relation queries the response was YES. [2024-01-31 16:53:19,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10522 conditions, 1238 events. 739/1238 cut-off events. For 27609/27609 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5968 event pairs, 92 based on Foata normal form. 4/1242 useless extension candidates. Maximal degree in co-relation 10433. Up to 786 conditions per place. [2024-01-31 16:53:19,480 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 245 selfloop transitions, 119 changer transitions 5/370 dead transitions. [2024-01-31 16:53:19,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 370 transitions, 6542 flow [2024-01-31 16:53:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 86 transitions. [2024-01-31 16:53:19,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41148325358851673 [2024-01-31 16:53:19,482 INFO L175 Difference]: Start difference. First operand has 233 places, 350 transitions, 5528 flow. Second operand 11 states and 86 transitions. [2024-01-31 16:53:19,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 370 transitions, 6542 flow [2024-01-31 16:53:19,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 370 transitions, 6128 flow, removed 173 selfloop flow, removed 14 redundant places. [2024-01-31 16:53:19,572 INFO L231 Difference]: Finished difference. Result has 231 places, 348 transitions, 5351 flow [2024-01-31 16:53:19,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5115, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5351, PETRI_PLACES=231, PETRI_TRANSITIONS=348} [2024-01-31 16:53:19,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 210 predicate places. [2024-01-31 16:53:19,574 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 348 transitions, 5351 flow [2024-01-31 16:53:19,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 16:53:19,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:19,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:19,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:19,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:19,786 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:19,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1695254041, now seen corresponding path program 21 times [2024-01-31 16:53:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:19,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021952027] [2024-01-31 16:53:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:19,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:19,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:19,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021952027] [2024-01-31 16:53:19,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021952027] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:19,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605320881] [2024-01-31 16:53:19,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:19,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:19,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:19,845 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:19,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-31 16:53:19,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:53:19,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:19,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:19,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:19,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:19,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605320881] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:19,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:19,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-01-31 16:53:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233859720] [2024-01-31 16:53:19,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:19,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:53:19,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:19,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:53:19,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:53:19,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:19,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 348 transitions, 5351 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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 16:53:19,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:19,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:19,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:20,287 INFO L124 PetriNetUnfolderBase]: 731/1231 cut-off events. [2024-01-31 16:53:20,288 INFO L125 PetriNetUnfolderBase]: For 26106/26106 co-relation queries the response was YES. [2024-01-31 16:53:20,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10316 conditions, 1231 events. 731/1231 cut-off events. For 26106/26106 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5907 event pairs, 91 based on Foata normal form. 2/1233 useless extension candidates. Maximal degree in co-relation 10232. Up to 773 conditions per place. [2024-01-31 16:53:20,297 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 258 selfloop transitions, 100 changer transitions 5/364 dead transitions. [2024-01-31 16:53:20,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 364 transitions, 6218 flow [2024-01-31 16:53:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:53:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:53:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2024-01-31 16:53:20,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-01-31 16:53:20,298 INFO L175 Difference]: Start difference. First operand has 231 places, 348 transitions, 5351 flow. Second operand 7 states and 63 transitions. [2024-01-31 16:53:20,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 364 transitions, 6218 flow [2024-01-31 16:53:20,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 364 transitions, 5950 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:20,377 INFO L231 Difference]: Finished difference. Result has 227 places, 345 transitions, 5243 flow [2024-01-31 16:53:20,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5071, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5243, PETRI_PLACES=227, PETRI_TRANSITIONS=345} [2024-01-31 16:53:20,378 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 206 predicate places. [2024-01-31 16:53:20,378 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 345 transitions, 5243 flow [2024-01-31 16:53:20,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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 16:53:20,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:20,379 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:20,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:20,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-01-31 16:53:20,589 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:20,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:20,590 INFO L85 PathProgramCache]: Analyzing trace with hash -25063862, now seen corresponding path program 22 times [2024-01-31 16:53:20,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:20,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578396255] [2024-01-31 16:53:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:20,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:20,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578396255] [2024-01-31 16:53:20,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578396255] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716768419] [2024-01-31 16:53:20,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:20,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:20,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:20,678 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:20,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-31 16:53:20,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:20,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:20,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:20,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:20,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:20,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716768419] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:20,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:20,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 16:53:20,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265581717] [2024-01-31 16:53:20,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:20,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:53:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:53:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:53:20,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:20,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 345 transitions, 5243 flow. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 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 16:53:20,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:20,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:20,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:21,257 INFO L124 PetriNetUnfolderBase]: 786/1314 cut-off events. [2024-01-31 16:53:21,258 INFO L125 PetriNetUnfolderBase]: For 32102/32102 co-relation queries the response was YES. [2024-01-31 16:53:21,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11225 conditions, 1314 events. 786/1314 cut-off events. For 32102/32102 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6383 event pairs, 33 based on Foata normal form. 20/1334 useless extension candidates. Maximal degree in co-relation 11142. Up to 851 conditions per place. [2024-01-31 16:53:21,269 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 298 selfloop transitions, 112 changer transitions 6/417 dead transitions. [2024-01-31 16:53:21,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 417 transitions, 7145 flow [2024-01-31 16:53:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:53:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:53:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 139 transitions. [2024-01-31 16:53:21,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034055727554177 [2024-01-31 16:53:21,270 INFO L175 Difference]: Start difference. First operand has 227 places, 345 transitions, 5243 flow. Second operand 17 states and 139 transitions. [2024-01-31 16:53:21,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 417 transitions, 7145 flow [2024-01-31 16:53:21,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 417 transitions, 6941 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:21,386 INFO L231 Difference]: Finished difference. Result has 237 places, 374 transitions, 6092 flow [2024-01-31 16:53:21,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5019, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6092, PETRI_PLACES=237, PETRI_TRANSITIONS=374} [2024-01-31 16:53:21,387 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2024-01-31 16:53:21,387 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 374 transitions, 6092 flow [2024-01-31 16:53:21,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 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 16:53:21,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:21,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:21,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:21,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-01-31 16:53:21,598 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:21,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:21,599 INFO L85 PathProgramCache]: Analyzing trace with hash 758856046, now seen corresponding path program 23 times [2024-01-31 16:53:21,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:21,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254040682] [2024-01-31 16:53:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:21,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:21,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:21,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254040682] [2024-01-31 16:53:21,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254040682] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:21,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380776251] [2024-01-31 16:53:21,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:21,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:21,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:21,655 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:21,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-31 16:53:21,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:21,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:21,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:21,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:21,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:21,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380776251] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:21,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:21,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-01-31 16:53:21,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848480414] [2024-01-31 16:53:21,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:21,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:53:21,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:53:21,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:53:21,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:21,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 374 transitions, 6092 flow. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 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 16:53:21,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:21,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:21,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:22,090 INFO L124 PetriNetUnfolderBase]: 798/1324 cut-off events. [2024-01-31 16:53:22,090 INFO L125 PetriNetUnfolderBase]: For 34716/34716 co-relation queries the response was YES. [2024-01-31 16:53:22,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11584 conditions, 1324 events. 798/1324 cut-off events. For 34716/34716 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6346 event pairs, 16 based on Foata normal form. 6/1330 useless extension candidates. Maximal degree in co-relation 11500. Up to 669 conditions per place. [2024-01-31 16:53:22,101 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 259 selfloop transitions, 150 changer transitions 0/410 dead transitions. [2024-01-31 16:53:22,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 410 transitions, 7425 flow [2024-01-31 16:53:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 88 transitions. [2024-01-31 16:53:22,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631578947368421 [2024-01-31 16:53:22,104 INFO L175 Difference]: Start difference. First operand has 237 places, 374 transitions, 6092 flow. Second operand 10 states and 88 transitions. [2024-01-31 16:53:22,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 410 transitions, 7425 flow [2024-01-31 16:53:22,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 410 transitions, 6772 flow, removed 265 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:22,207 INFO L231 Difference]: Finished difference. Result has 240 places, 382 transitions, 5910 flow [2024-01-31 16:53:22,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5482, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5910, PETRI_PLACES=240, PETRI_TRANSITIONS=382} [2024-01-31 16:53:22,208 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2024-01-31 16:53:22,208 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 382 transitions, 5910 flow [2024-01-31 16:53:22,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 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 16:53:22,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:22,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:22,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:22,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-01-31 16:53:22,409 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:22,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:22,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1527853358, now seen corresponding path program 24 times [2024-01-31 16:53:22,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:22,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637930043] [2024-01-31 16:53:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:22,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:22,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:22,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637930043] [2024-01-31 16:53:22,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637930043] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:22,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454405532] [2024-01-31 16:53:22,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:22,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:22,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:22,475 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:22,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-31 16:53:22,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:53:22,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:22,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:22,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:22,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:53:22,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454405532] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:22,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:22,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-31 16:53:22,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384861643] [2024-01-31 16:53:22,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:22,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:53:22,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:53:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:53:22,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:22,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 382 transitions, 5910 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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 16:53:22,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:22,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:22,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:22,977 INFO L124 PetriNetUnfolderBase]: 874/1436 cut-off events. [2024-01-31 16:53:22,978 INFO L125 PetriNetUnfolderBase]: For 30392/30392 co-relation queries the response was YES. [2024-01-31 16:53:22,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12057 conditions, 1436 events. 874/1436 cut-off events. For 30392/30392 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6956 event pairs, 38 based on Foata normal form. 14/1450 useless extension candidates. Maximal degree in co-relation 11968. Up to 996 conditions per place. [2024-01-31 16:53:22,990 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 320 selfloop transitions, 129 changer transitions 0/450 dead transitions. [2024-01-31 16:53:22,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 450 transitions, 7664 flow [2024-01-31 16:53:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:53:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:53:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 132 transitions. [2024-01-31 16:53:22,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4086687306501548 [2024-01-31 16:53:22,991 INFO L175 Difference]: Start difference. First operand has 240 places, 382 transitions, 5910 flow. Second operand 17 states and 132 transitions. [2024-01-31 16:53:22,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 450 transitions, 7664 flow [2024-01-31 16:53:23,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 450 transitions, 7358 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:23,098 INFO L231 Difference]: Finished difference. Result has 256 places, 422 transitions, 6563 flow [2024-01-31 16:53:23,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6563, PETRI_PLACES=256, PETRI_TRANSITIONS=422} [2024-01-31 16:53:23,099 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2024-01-31 16:53:23,099 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 422 transitions, 6563 flow [2024-01-31 16:53:23,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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 16:53:23,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:23,099 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:23,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:23,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:23,311 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:23,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash 355450984, now seen corresponding path program 25 times [2024-01-31 16:53:23,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:23,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139938582] [2024-01-31 16:53:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:23,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:23,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139938582] [2024-01-31 16:53:23,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139938582] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:23,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135140500] [2024-01-31 16:53:23,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:23,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:23,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:23,374 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:23,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-31 16:53:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:23,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:23,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:23,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:23,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135140500] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:23,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:23,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:53:23,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875105453] [2024-01-31 16:53:23,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:23,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:53:23,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:53:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:53:23,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:23,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 422 transitions, 6563 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 16:53:23,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:23,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:23,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:23,916 INFO L124 PetriNetUnfolderBase]: 902/1486 cut-off events. [2024-01-31 16:53:23,916 INFO L125 PetriNetUnfolderBase]: For 32414/32414 co-relation queries the response was YES. [2024-01-31 16:53:23,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12699 conditions, 1486 events. 902/1486 cut-off events. For 32414/32414 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7284 event pairs, 41 based on Foata normal form. 8/1494 useless extension candidates. Maximal degree in co-relation 12606. Up to 1041 conditions per place. [2024-01-31 16:53:23,929 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 338 selfloop transitions, 124 changer transitions 0/463 dead transitions. [2024-01-31 16:53:23,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 463 transitions, 8118 flow [2024-01-31 16:53:23,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:53:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:53:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 106 transitions. [2024-01-31 16:53:23,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39849624060150374 [2024-01-31 16:53:23,930 INFO L175 Difference]: Start difference. First operand has 256 places, 422 transitions, 6563 flow. Second operand 14 states and 106 transitions. [2024-01-31 16:53:23,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 463 transitions, 8118 flow [2024-01-31 16:53:24,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 463 transitions, 7799 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:24,052 INFO L231 Difference]: Finished difference. Result has 267 places, 440 transitions, 6937 flow [2024-01-31 16:53:24,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6937, PETRI_PLACES=267, PETRI_TRANSITIONS=440} [2024-01-31 16:53:24,053 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2024-01-31 16:53:24,053 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 440 transitions, 6937 flow [2024-01-31 16:53:24,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 16:53:24,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:24,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:24,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:24,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-31 16:53:24,264 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:24,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:24,264 INFO L85 PathProgramCache]: Analyzing trace with hash -803365588, now seen corresponding path program 26 times [2024-01-31 16:53:24,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:24,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262073457] [2024-01-31 16:53:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:24,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:24,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:24,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262073457] [2024-01-31 16:53:24,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262073457] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:24,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461306007] [2024-01-31 16:53:24,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:24,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:24,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:24,325 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:24,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-31 16:53:24,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:24,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:24,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:24,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:24,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:24,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461306007] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:24,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:24,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-31 16:53:24,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345721659] [2024-01-31 16:53:24,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:24,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:53:24,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:53:24,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:53:24,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:24,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 440 transitions, 6937 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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 16:53:24,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:24,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:24,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:24,849 INFO L124 PetriNetUnfolderBase]: 904/1496 cut-off events. [2024-01-31 16:53:24,849 INFO L125 PetriNetUnfolderBase]: For 33816/33816 co-relation queries the response was YES. [2024-01-31 16:53:24,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12814 conditions, 1496 events. 904/1496 cut-off events. For 33816/33816 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7452 event pairs, 53 based on Foata normal form. 8/1504 useless extension candidates. Maximal degree in co-relation 12716. Up to 985 conditions per place. [2024-01-31 16:53:24,864 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 335 selfloop transitions, 130 changer transitions 4/470 dead transitions. [2024-01-31 16:53:24,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 470 transitions, 8189 flow [2024-01-31 16:53:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:53:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:53:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 112 transitions. [2024-01-31 16:53:24,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-01-31 16:53:24,872 INFO L175 Difference]: Start difference. First operand has 267 places, 440 transitions, 6937 flow. Second operand 14 states and 112 transitions. [2024-01-31 16:53:24,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 470 transitions, 8189 flow [2024-01-31 16:53:24,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 470 transitions, 8017 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:25,004 INFO L231 Difference]: Finished difference. Result has 278 places, 440 transitions, 7020 flow [2024-01-31 16:53:25,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6765, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7020, PETRI_PLACES=278, PETRI_TRANSITIONS=440} [2024-01-31 16:53:25,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2024-01-31 16:53:25,005 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 440 transitions, 7020 flow [2024-01-31 16:53:25,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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 16:53:25,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:25,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:25,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:25,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-31 16:53:25,206 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:25,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:25,206 INFO L85 PathProgramCache]: Analyzing trace with hash 760651239, now seen corresponding path program 27 times [2024-01-31 16:53:25,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:25,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249192613] [2024-01-31 16:53:25,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:25,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:25,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:25,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249192613] [2024-01-31 16:53:25,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249192613] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:25,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805933211] [2024-01-31 16:53:25,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:25,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:25,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:25,253 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:25,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-31 16:53:25,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:53:25,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:25,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:25,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:25,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:25,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805933211] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:25,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:25,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 16:53:25,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527789785] [2024-01-31 16:53:25,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:25,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:25,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:25,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:25,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:25,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:25,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 440 transitions, 7020 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:25,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:25,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:25,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:25,772 INFO L124 PetriNetUnfolderBase]: 900/1481 cut-off events. [2024-01-31 16:53:25,773 INFO L125 PetriNetUnfolderBase]: For 35298/35298 co-relation queries the response was YES. [2024-01-31 16:53:25,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12888 conditions, 1481 events. 900/1481 cut-off events. For 35298/35298 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7328 event pairs, 121 based on Foata normal form. 6/1487 useless extension candidates. Maximal degree in co-relation 12787. Up to 973 conditions per place. [2024-01-31 16:53:25,785 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 302 selfloop transitions, 151 changer transitions 4/458 dead transitions. [2024-01-31 16:53:25,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 458 transitions, 8264 flow [2024-01-31 16:53:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:53:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:53:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 95 transitions. [2024-01-31 16:53:25,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-31 16:53:25,786 INFO L175 Difference]: Start difference. First operand has 278 places, 440 transitions, 7020 flow. Second operand 12 states and 95 transitions. [2024-01-31 16:53:25,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 458 transitions, 8264 flow [2024-01-31 16:53:25,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 458 transitions, 8057 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-01-31 16:53:25,908 INFO L231 Difference]: Finished difference. Result has 276 places, 435 transitions, 7086 flow [2024-01-31 16:53:25,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6789, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7086, PETRI_PLACES=276, PETRI_TRANSITIONS=435} [2024-01-31 16:53:25,909 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2024-01-31 16:53:25,909 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 435 transitions, 7086 flow [2024-01-31 16:53:25,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:25,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:25,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:25,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-01-31 16:53:26,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:26,110 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:26,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash -716294126, now seen corresponding path program 28 times [2024-01-31 16:53:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:26,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145096101] [2024-01-31 16:53:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:26,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:26,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145096101] [2024-01-31 16:53:26,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145096101] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:26,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429805733] [2024-01-31 16:53:26,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:26,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:26,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:26,160 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:26,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-31 16:53:26,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:26,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:26,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:26,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:26,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:26,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429805733] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:26,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:26,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-31 16:53:26,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635311617] [2024-01-31 16:53:26,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:26,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:53:26,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:53:26,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:53:26,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:26,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 435 transitions, 7086 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 16:53:26,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:26,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:26,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:26,766 INFO L124 PetriNetUnfolderBase]: 962/1571 cut-off events. [2024-01-31 16:53:26,766 INFO L125 PetriNetUnfolderBase]: For 41534/41534 co-relation queries the response was YES. [2024-01-31 16:53:26,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14153 conditions, 1571 events. 962/1571 cut-off events. For 41534/41534 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7728 event pairs, 40 based on Foata normal form. 12/1583 useless extension candidates. Maximal degree in co-relation 14053. Up to 935 conditions per place. [2024-01-31 16:53:26,781 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 292 selfloop transitions, 205 changer transitions 0/498 dead transitions. [2024-01-31 16:53:26,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 498 transitions, 9235 flow [2024-01-31 16:53:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:53:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:53:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 133 transitions. [2024-01-31 16:53:26,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-01-31 16:53:26,783 INFO L175 Difference]: Start difference. First operand has 276 places, 435 transitions, 7086 flow. Second operand 17 states and 133 transitions. [2024-01-31 16:53:26,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 498 transitions, 9235 flow [2024-01-31 16:53:26,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 498 transitions, 8853 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-01-31 16:53:26,928 INFO L231 Difference]: Finished difference. Result has 282 places, 474 transitions, 8329 flow [2024-01-31 16:53:26,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6706, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8329, PETRI_PLACES=282, PETRI_TRANSITIONS=474} [2024-01-31 16:53:26,928 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 261 predicate places. [2024-01-31 16:53:26,929 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 474 transitions, 8329 flow [2024-01-31 16:53:26,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 16:53:26,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:26,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:26,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:27,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:27,140 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:27,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash 804620182, now seen corresponding path program 29 times [2024-01-31 16:53:27,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:27,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482033951] [2024-01-31 16:53:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:27,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:27,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:27,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482033951] [2024-01-31 16:53:27,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482033951] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:27,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896144364] [2024-01-31 16:53:27,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:27,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:27,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:27,193 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:27,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-31 16:53:27,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:27,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:27,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:27,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:27,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:27,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896144364] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:27,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:27,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 16:53:27,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713289314] [2024-01-31 16:53:27,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:27,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:53:27,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:27,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:53:27,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:53:27,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:27,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 474 transitions, 8329 flow. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:27,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:27,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:27,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:27,874 INFO L124 PetriNetUnfolderBase]: 1008/1653 cut-off events. [2024-01-31 16:53:27,875 INFO L125 PetriNetUnfolderBase]: For 46122/46122 co-relation queries the response was YES. [2024-01-31 16:53:27,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15335 conditions, 1653 events. 1008/1653 cut-off events. For 46122/46122 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8292 event pairs, 40 based on Foata normal form. 6/1659 useless extension candidates. Maximal degree in co-relation 15231. Up to 1047 conditions per place. [2024-01-31 16:53:27,890 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 346 selfloop transitions, 188 changer transitions 0/535 dead transitions. [2024-01-31 16:53:27,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 535 transitions, 10178 flow [2024-01-31 16:53:27,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:53:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:53:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 163 transitions. [2024-01-31 16:53:27,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37299771167048057 [2024-01-31 16:53:27,891 INFO L175 Difference]: Start difference. First operand has 282 places, 474 transitions, 8329 flow. Second operand 23 states and 163 transitions. [2024-01-31 16:53:27,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 535 transitions, 10178 flow [2024-01-31 16:53:28,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 535 transitions, 9514 flow, removed 297 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:28,115 INFO L231 Difference]: Finished difference. Result has 301 places, 505 transitions, 8714 flow [2024-01-31 16:53:28,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7721, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8714, PETRI_PLACES=301, PETRI_TRANSITIONS=505} [2024-01-31 16:53:28,116 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 280 predicate places. [2024-01-31 16:53:28,116 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 505 transitions, 8714 flow [2024-01-31 16:53:28,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:28,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:28,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:28,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-01-31 16:53:28,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-01-31 16:53:28,317 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:28,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:28,317 INFO L85 PathProgramCache]: Analyzing trace with hash -574482014, now seen corresponding path program 30 times [2024-01-31 16:53:28,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:28,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092888061] [2024-01-31 16:53:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:28,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:28,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:28,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092888061] [2024-01-31 16:53:28,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092888061] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:28,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145321415] [2024-01-31 16:53:28,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:28,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:28,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:28,370 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:28,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-31 16:53:28,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:53:28,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:28,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:28,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:28,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:28,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145321415] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:28,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:28,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 16:53:28,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795655498] [2024-01-31 16:53:28,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:28,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:28,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:28,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:28,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 505 transitions, 8714 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 16:53:28,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:28,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:28,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:28,981 INFO L124 PetriNetUnfolderBase]: 1045/1706 cut-off events. [2024-01-31 16:53:28,981 INFO L125 PetriNetUnfolderBase]: For 35000/35000 co-relation queries the response was YES. [2024-01-31 16:53:28,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15381 conditions, 1706 events. 1045/1706 cut-off events. For 35000/35000 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 8513 event pairs, 64 based on Foata normal form. 8/1714 useless extension candidates. Maximal degree in co-relation 15273. Up to 1002 conditions per place. [2024-01-31 16:53:28,997 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 368 selfloop transitions, 179 changer transitions 1/549 dead transitions. [2024-01-31 16:53:28,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 549 transitions, 10407 flow [2024-01-31 16:53:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:53:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:53:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 108 transitions. [2024-01-31 16:53:28,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43724696356275305 [2024-01-31 16:53:28,998 INFO L175 Difference]: Start difference. First operand has 301 places, 505 transitions, 8714 flow. Second operand 13 states and 108 transitions. [2024-01-31 16:53:28,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 549 transitions, 10407 flow [2024-01-31 16:53:29,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 549 transitions, 9989 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-01-31 16:53:29,179 INFO L231 Difference]: Finished difference. Result has 304 places, 522 transitions, 9151 flow [2024-01-31 16:53:29,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8299, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9151, PETRI_PLACES=304, PETRI_TRANSITIONS=522} [2024-01-31 16:53:29,180 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2024-01-31 16:53:29,180 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 522 transitions, 9151 flow [2024-01-31 16:53:29,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 16:53:29,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:29,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:29,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-01-31 16:53:29,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:29,387 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:29,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:29,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1089360946, now seen corresponding path program 31 times [2024-01-31 16:53:29,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:29,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406639221] [2024-01-31 16:53:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:29,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:29,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406639221] [2024-01-31 16:53:29,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406639221] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:29,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62629801] [2024-01-31 16:53:29,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:29,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:29,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:29,436 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:29,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-31 16:53:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:29,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:53:29,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:29,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:29,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62629801] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:29,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:29,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 16:53:29,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063776486] [2024-01-31 16:53:29,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:29,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:53:29,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:29,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:53:29,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:53:29,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:29,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 522 transitions, 9151 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 16:53:29,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:29,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:29,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:30,100 INFO L124 PetriNetUnfolderBase]: 1037/1691 cut-off events. [2024-01-31 16:53:30,100 INFO L125 PetriNetUnfolderBase]: For 35407/35407 co-relation queries the response was YES. [2024-01-31 16:53:30,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15360 conditions, 1691 events. 1037/1691 cut-off events. For 35407/35407 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 8480 event pairs, 40 based on Foata normal form. 10/1701 useless extension candidates. Maximal degree in co-relation 15248. Up to 1016 conditions per place. [2024-01-31 16:53:30,113 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 340 selfloop transitions, 206 changer transitions 0/547 dead transitions. [2024-01-31 16:53:30,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 547 transitions, 10396 flow [2024-01-31 16:53:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:53:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:53:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 123 transitions. [2024-01-31 16:53:30,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40460526315789475 [2024-01-31 16:53:30,114 INFO L175 Difference]: Start difference. First operand has 304 places, 522 transitions, 9151 flow. Second operand 16 states and 123 transitions. [2024-01-31 16:53:30,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 547 transitions, 10396 flow [2024-01-31 16:53:30,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 547 transitions, 10160 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-01-31 16:53:30,261 INFO L231 Difference]: Finished difference. Result has 308 places, 522 transitions, 9345 flow [2024-01-31 16:53:30,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8762, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9345, PETRI_PLACES=308, PETRI_TRANSITIONS=522} [2024-01-31 16:53:30,261 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2024-01-31 16:53:30,261 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 522 transitions, 9345 flow [2024-01-31 16:53:30,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 16:53:30,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:30,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:30,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-01-31 16:53:30,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-01-31 16:53:30,468 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:30,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash -119127464, now seen corresponding path program 32 times [2024-01-31 16:53:30,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:30,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261154866] [2024-01-31 16:53:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:30,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:30,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:30,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261154866] [2024-01-31 16:53:30,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261154866] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:30,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560772567] [2024-01-31 16:53:30,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:30,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:30,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:30,671 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:30,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-31 16:53:30,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:30,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:30,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:30,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:30,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:31,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560772567] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:31,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:31,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-31 16:53:31,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142972335] [2024-01-31 16:53:31,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:31,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:53:31,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:31,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:53:31,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:53:31,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:31,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 522 transitions, 9345 flow. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 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 16:53:31,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:31,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:31,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:31,748 INFO L124 PetriNetUnfolderBase]: 1232/2077 cut-off events. [2024-01-31 16:53:31,748 INFO L125 PetriNetUnfolderBase]: For 45763/45763 co-relation queries the response was YES. [2024-01-31 16:53:31,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18968 conditions, 2077 events. 1232/2077 cut-off events. For 45763/45763 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 11285 event pairs, 31 based on Foata normal form. 2/2079 useless extension candidates. Maximal degree in co-relation 18857. Up to 1565 conditions per place. [2024-01-31 16:53:31,774 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 534 selfloop transitions, 111 changer transitions 13/659 dead transitions. [2024-01-31 16:53:31,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 659 transitions, 12641 flow [2024-01-31 16:53:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-01-31 16:53:31,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-01-31 16:53:31,775 INFO L175 Difference]: Start difference. First operand has 308 places, 522 transitions, 9345 flow. Second operand 11 states and 121 transitions. [2024-01-31 16:53:31,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 659 transitions, 12641 flow [2024-01-31 16:53:31,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 659 transitions, 12168 flow, removed 19 selfloop flow, removed 12 redundant places. [2024-01-31 16:53:31,997 INFO L231 Difference]: Finished difference. Result has 315 places, 584 transitions, 10490 flow [2024-01-31 16:53:31,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8917, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10490, PETRI_PLACES=315, PETRI_TRANSITIONS=584} [2024-01-31 16:53:31,997 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 294 predicate places. [2024-01-31 16:53:31,997 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 584 transitions, 10490 flow [2024-01-31 16:53:31,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 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 16:53:31,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:31,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:32,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-01-31 16:53:32,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:32,205 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:32,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:32,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1777766598, now seen corresponding path program 33 times [2024-01-31 16:53:32,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:32,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154296502] [2024-01-31 16:53:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:32,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:32,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:32,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154296502] [2024-01-31 16:53:32,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154296502] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:32,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099379200] [2024-01-31 16:53:32,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:32,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:32,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:32,404 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:32,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-31 16:53:32,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:53:32,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:32,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:32,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:32,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:32,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099379200] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:32,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:32,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-01-31 16:53:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208539695] [2024-01-31 16:53:32,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:32,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:53:32,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:32,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:53:32,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:53:32,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:32,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 584 transitions, 10490 flow. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:32,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:32,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:32,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:33,551 INFO L124 PetriNetUnfolderBase]: 1249/2116 cut-off events. [2024-01-31 16:53:33,551 INFO L125 PetriNetUnfolderBase]: For 49633/49633 co-relation queries the response was YES. [2024-01-31 16:53:33,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19543 conditions, 2116 events. 1249/2116 cut-off events. For 49633/49633 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 11650 event pairs, 35 based on Foata normal form. 2/2118 useless extension candidates. Maximal degree in co-relation 19424. Up to 1715 conditions per place. [2024-01-31 16:53:33,569 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 531 selfloop transitions, 94 changer transitions 19/645 dead transitions. [2024-01-31 16:53:33,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 645 transitions, 12423 flow [2024-01-31 16:53:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:53:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:53:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 116 transitions. [2024-01-31 16:53:33,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2024-01-31 16:53:33,570 INFO L175 Difference]: Start difference. First operand has 315 places, 584 transitions, 10490 flow. Second operand 12 states and 116 transitions. [2024-01-31 16:53:33,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 645 transitions, 12423 flow [2024-01-31 16:53:33,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 645 transitions, 12069 flow, removed 177 selfloop flow, removed 2 redundant places. [2024-01-31 16:53:33,810 INFO L231 Difference]: Finished difference. Result has 327 places, 591 transitions, 10655 flow [2024-01-31 16:53:33,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10198, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10655, PETRI_PLACES=327, PETRI_TRANSITIONS=591} [2024-01-31 16:53:33,810 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 306 predicate places. [2024-01-31 16:53:33,811 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 591 transitions, 10655 flow [2024-01-31 16:53:33,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:33,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:33,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:33,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-01-31 16:53:34,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-01-31 16:53:34,011 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:34,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:34,012 INFO L85 PathProgramCache]: Analyzing trace with hash -175019978, now seen corresponding path program 34 times [2024-01-31 16:53:34,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:34,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726327114] [2024-01-31 16:53:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:34,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:34,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:34,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726327114] [2024-01-31 16:53:34,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726327114] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:34,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354687342] [2024-01-31 16:53:34,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:34,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:34,270 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:34,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-31 16:53:34,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:34,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:34,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:34,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:34,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:34,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354687342] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:34,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:34,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-31 16:53:34,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366402142] [2024-01-31 16:53:34,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:34,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:53:34,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:34,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:53:34,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:53:34,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:34,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 591 transitions, 10655 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 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 16:53:34,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:34,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:34,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:35,343 INFO L124 PetriNetUnfolderBase]: 1227/2077 cut-off events. [2024-01-31 16:53:35,343 INFO L125 PetriNetUnfolderBase]: For 44949/44949 co-relation queries the response was YES. [2024-01-31 16:53:35,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18972 conditions, 2077 events. 1227/2077 cut-off events. For 44949/44949 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 11362 event pairs, 38 based on Foata normal form. 1/2078 useless extension candidates. Maximal degree in co-relation 18849. Up to 1573 conditions per place. [2024-01-31 16:53:35,363 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 526 selfloop transitions, 111 changer transitions 5/643 dead transitions. [2024-01-31 16:53:35,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 643 transitions, 12429 flow [2024-01-31 16:53:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-01-31 16:53:35,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-01-31 16:53:35,364 INFO L175 Difference]: Start difference. First operand has 327 places, 591 transitions, 10655 flow. Second operand 9 states and 102 transitions. [2024-01-31 16:53:35,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 643 transitions, 12429 flow [2024-01-31 16:53:35,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 643 transitions, 12107 flow, removed 120 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:35,590 INFO L231 Difference]: Finished difference. Result has 330 places, 595 transitions, 10736 flow [2024-01-31 16:53:35,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10351, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10736, PETRI_PLACES=330, PETRI_TRANSITIONS=595} [2024-01-31 16:53:35,591 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 309 predicate places. [2024-01-31 16:53:35,591 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 595 transitions, 10736 flow [2024-01-31 16:53:35,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 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 16:53:35,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:35,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:35,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:35,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-31 16:53:35,794 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:35,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:35,794 INFO L85 PathProgramCache]: Analyzing trace with hash 144013456, now seen corresponding path program 35 times [2024-01-31 16:53:35,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:35,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74567010] [2024-01-31 16:53:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:35,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:35,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:35,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74567010] [2024-01-31 16:53:35,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74567010] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:35,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608655893] [2024-01-31 16:53:35,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:35,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:35,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:35,973 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:35,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-31 16:53:36,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:36,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:36,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:36,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:36,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:36,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608655893] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:36,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:36,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-01-31 16:53:36,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718542249] [2024-01-31 16:53:36,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:53:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:53:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:53:36,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:36,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 595 transitions, 10736 flow. Second operand has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:36,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:36,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:36,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:37,001 INFO L124 PetriNetUnfolderBase]: 1224/2067 cut-off events. [2024-01-31 16:53:37,001 INFO L125 PetriNetUnfolderBase]: For 45127/45127 co-relation queries the response was YES. [2024-01-31 16:53:37,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18713 conditions, 2067 events. 1224/2067 cut-off events. For 45127/45127 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 11235 event pairs, 33 based on Foata normal form. 1/2068 useless extension candidates. Maximal degree in co-relation 18590. Up to 1637 conditions per place. [2024-01-31 16:53:37,022 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 527 selfloop transitions, 112 changer transitions 5/645 dead transitions. [2024-01-31 16:53:37,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 645 transitions, 12418 flow [2024-01-31 16:53:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:37,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-01-31 16:53:37,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2024-01-31 16:53:37,023 INFO L175 Difference]: Start difference. First operand has 330 places, 595 transitions, 10736 flow. Second operand 11 states and 110 transitions. [2024-01-31 16:53:37,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 645 transitions, 12418 flow [2024-01-31 16:53:37,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 645 transitions, 12110 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:37,310 INFO L231 Difference]: Finished difference. Result has 334 places, 601 transitions, 10843 flow [2024-01-31 16:53:37,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10441, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10843, PETRI_PLACES=334, PETRI_TRANSITIONS=601} [2024-01-31 16:53:37,311 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 313 predicate places. [2024-01-31 16:53:37,311 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 601 transitions, 10843 flow [2024-01-31 16:53:37,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:37,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:37,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:37,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:37,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-31 16:53:37,523 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:37,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash -614077588, now seen corresponding path program 36 times [2024-01-31 16:53:37,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:37,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266619768] [2024-01-31 16:53:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:37,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:37,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:37,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266619768] [2024-01-31 16:53:37,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266619768] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:37,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734419121] [2024-01-31 16:53:37,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:37,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:37,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:37,697 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:37,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-31 16:53:37,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:53:37,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:37,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:37,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:37,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:38,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734419121] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:38,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:38,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2024-01-31 16:53:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076444966] [2024-01-31 16:53:38,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:53:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:53:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:53:38,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:38,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 601 transitions, 10843 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 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 16:53:38,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:38,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:38,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:38,815 INFO L124 PetriNetUnfolderBase]: 1292/2196 cut-off events. [2024-01-31 16:53:38,815 INFO L125 PetriNetUnfolderBase]: For 49306/49306 co-relation queries the response was YES. [2024-01-31 16:53:38,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19889 conditions, 2196 events. 1292/2196 cut-off events. For 49306/49306 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 12235 event pairs, 53 based on Foata normal form. 1/2197 useless extension candidates. Maximal degree in co-relation 19766. Up to 1915 conditions per place. [2024-01-31 16:53:38,833 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 576 selfloop transitions, 89 changer transitions 7/673 dead transitions. [2024-01-31 16:53:38,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 673 transitions, 13080 flow [2024-01-31 16:53:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-01-31 16:53:38,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-01-31 16:53:38,834 INFO L175 Difference]: Start difference. First operand has 334 places, 601 transitions, 10843 flow. Second operand 9 states and 95 transitions. [2024-01-31 16:53:38,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 673 transitions, 13080 flow [2024-01-31 16:53:39,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 673 transitions, 12848 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-01-31 16:53:39,078 INFO L231 Difference]: Finished difference. Result has 335 places, 629 transitions, 11390 flow [2024-01-31 16:53:39,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10619, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11390, PETRI_PLACES=335, PETRI_TRANSITIONS=629} [2024-01-31 16:53:39,079 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 314 predicate places. [2024-01-31 16:53:39,079 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 629 transitions, 11390 flow [2024-01-31 16:53:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 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 16:53:39,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:39,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:39,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-01-31 16:53:39,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-31 16:53:39,291 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:39,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1253519028, now seen corresponding path program 37 times [2024-01-31 16:53:39,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:39,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285798619] [2024-01-31 16:53:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:39,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:39,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285798619] [2024-01-31 16:53:39,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285798619] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327922873] [2024-01-31 16:53:39,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:39,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:39,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:39,439 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:39,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-31 16:53:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:39,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:39,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:39,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:39,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327922873] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:39,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:39,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2024-01-31 16:53:39,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591180209] [2024-01-31 16:53:39,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:39,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:53:39,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:39,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:53:39,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:53:39,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:39,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 629 transitions, 11390 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 16:53:39,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:39,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:39,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:40,577 INFO L124 PetriNetUnfolderBase]: 1288/2183 cut-off events. [2024-01-31 16:53:40,577 INFO L125 PetriNetUnfolderBase]: For 49690/49690 co-relation queries the response was YES. [2024-01-31 16:53:40,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19889 conditions, 2183 events. 1288/2183 cut-off events. For 49690/49690 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 12075 event pairs, 56 based on Foata normal form. 1/2184 useless extension candidates. Maximal degree in co-relation 19766. Up to 1915 conditions per place. [2024-01-31 16:53:40,597 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 570 selfloop transitions, 88 changer transitions 6/665 dead transitions. [2024-01-31 16:53:40,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 665 transitions, 13049 flow [2024-01-31 16:53:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:53:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:53:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-01-31 16:53:40,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657894736842105 [2024-01-31 16:53:40,598 INFO L175 Difference]: Start difference. First operand has 335 places, 629 transitions, 11390 flow. Second operand 8 states and 86 transitions. [2024-01-31 16:53:40,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 665 transitions, 13049 flow [2024-01-31 16:53:40,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 665 transitions, 12819 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-01-31 16:53:40,866 INFO L231 Difference]: Finished difference. Result has 339 places, 632 transitions, 11498 flow [2024-01-31 16:53:40,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=11166, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11498, PETRI_PLACES=339, PETRI_TRANSITIONS=632} [2024-01-31 16:53:40,866 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 318 predicate places. [2024-01-31 16:53:40,867 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 632 transitions, 11498 flow [2024-01-31 16:53:40,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 16:53:40,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:40,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:40,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:41,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:41,080 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:41,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:41,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1096535720, now seen corresponding path program 38 times [2024-01-31 16:53:41,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:41,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884547770] [2024-01-31 16:53:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:41,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:41,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:41,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884547770] [2024-01-31 16:53:41,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884547770] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:41,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090962177] [2024-01-31 16:53:41,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:41,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:41,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:41,245 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:41,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-31 16:53:41,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:41,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:41,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:41,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:41,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:41,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090962177] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:41,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:41,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-01-31 16:53:41,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227645427] [2024-01-31 16:53:41,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:41,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:53:41,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:41,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:53:41,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:53:41,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:41,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 632 transitions, 11498 flow. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 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 16:53:41,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:41,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:41,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:42,248 INFO L124 PetriNetUnfolderBase]: 1281/2169 cut-off events. [2024-01-31 16:53:42,248 INFO L125 PetriNetUnfolderBase]: For 48055/48055 co-relation queries the response was YES. [2024-01-31 16:53:42,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19767 conditions, 2169 events. 1281/2169 cut-off events. For 48055/48055 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 11983 event pairs, 55 based on Foata normal form. 1/2170 useless extension candidates. Maximal degree in co-relation 19642. Up to 1959 conditions per place. [2024-01-31 16:53:42,269 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 583 selfloop transitions, 73 changer transitions 5/662 dead transitions. [2024-01-31 16:53:42,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 662 transitions, 13001 flow [2024-01-31 16:53:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-01-31 16:53:42,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029239766081871 [2024-01-31 16:53:42,270 INFO L175 Difference]: Start difference. First operand has 339 places, 632 transitions, 11498 flow. Second operand 9 states and 86 transitions. [2024-01-31 16:53:42,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 662 transitions, 13001 flow [2024-01-31 16:53:42,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 662 transitions, 12777 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-01-31 16:53:42,521 INFO L231 Difference]: Finished difference. Result has 343 places, 635 transitions, 11551 flow [2024-01-31 16:53:42,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=11278, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11551, PETRI_PLACES=343, PETRI_TRANSITIONS=635} [2024-01-31 16:53:42,522 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 322 predicate places. [2024-01-31 16:53:42,522 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 635 transitions, 11551 flow [2024-01-31 16:53:42,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 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 16:53:42,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:42,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:42,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-01-31 16:53:42,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:42,724 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:42,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:42,724 INFO L85 PathProgramCache]: Analyzing trace with hash -8496978, now seen corresponding path program 39 times [2024-01-31 16:53:42,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:42,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308487004] [2024-01-31 16:53:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:42,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:42,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:42,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308487004] [2024-01-31 16:53:42,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308487004] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:42,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316891305] [2024-01-31 16:53:42,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:42,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:42,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:42,885 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:42,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-01-31 16:53:42,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:53:42,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:42,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:42,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:43,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316891305] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:43,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:43,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-01-31 16:53:43,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951532579] [2024-01-31 16:53:43,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:43,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:53:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:53:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:53:43,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:43,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 635 transitions, 11551 flow. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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 16:53:43,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:43,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:43,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:43,975 INFO L124 PetriNetUnfolderBase]: 1398/2411 cut-off events. [2024-01-31 16:53:43,975 INFO L125 PetriNetUnfolderBase]: For 55035/55035 co-relation queries the response was YES. [2024-01-31 16:53:43,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22024 conditions, 2411 events. 1398/2411 cut-off events. For 55035/55035 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 13990 event pairs, 65 based on Foata normal form. 2/2413 useless extension candidates. Maximal degree in co-relation 21898. Up to 2083 conditions per place. [2024-01-31 16:53:44,001 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 626 selfloop transitions, 98 changer transitions 18/743 dead transitions. [2024-01-31 16:53:44,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 743 transitions, 14560 flow [2024-01-31 16:53:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:53:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:53:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 118 transitions. [2024-01-31 16:53:44,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175438596491229 [2024-01-31 16:53:44,002 INFO L175 Difference]: Start difference. First operand has 343 places, 635 transitions, 11551 flow. Second operand 12 states and 118 transitions. [2024-01-31 16:53:44,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 743 transitions, 14560 flow [2024-01-31 16:53:44,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 743 transitions, 14335 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:44,307 INFO L231 Difference]: Finished difference. Result has 356 places, 687 transitions, 12835 flow [2024-01-31 16:53:44,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=11334, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12835, PETRI_PLACES=356, PETRI_TRANSITIONS=687} [2024-01-31 16:53:44,307 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 335 predicate places. [2024-01-31 16:53:44,307 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 687 transitions, 12835 flow [2024-01-31 16:53:44,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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 16:53:44,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:44,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:44,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-01-31 16:53:44,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-01-31 16:53:44,508 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:44,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:44,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1497901974, now seen corresponding path program 40 times [2024-01-31 16:53:44,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:44,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731417601] [2024-01-31 16:53:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:44,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:44,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:44,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731417601] [2024-01-31 16:53:44,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731417601] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:44,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23554823] [2024-01-31 16:53:44,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:44,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:44,674 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:44,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-01-31 16:53:44,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:44,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:44,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:44,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:44,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:45,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23554823] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:45,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:45,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-31 16:53:45,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788160216] [2024-01-31 16:53:45,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:45,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:53:45,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:53:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:53:45,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:45,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 687 transitions, 12835 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 16:53:45,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:45,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:45,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:45,856 INFO L124 PetriNetUnfolderBase]: 1435/2476 cut-off events. [2024-01-31 16:53:45,856 INFO L125 PetriNetUnfolderBase]: For 59901/59901 co-relation queries the response was YES. [2024-01-31 16:53:45,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23071 conditions, 2476 events. 1435/2476 cut-off events. For 59901/59901 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 14530 event pairs, 63 based on Foata normal form. 1/2477 useless extension candidates. Maximal degree in co-relation 22937. Up to 2100 conditions per place. [2024-01-31 16:53:45,884 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 640 selfloop transitions, 117 changer transitions 5/763 dead transitions. [2024-01-31 16:53:45,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 763 transitions, 15352 flow [2024-01-31 16:53:45,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:53:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:53:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-01-31 16:53:45,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406698564593302 [2024-01-31 16:53:45,884 INFO L175 Difference]: Start difference. First operand has 356 places, 687 transitions, 12835 flow. Second operand 11 states and 113 transitions. [2024-01-31 16:53:45,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 763 transitions, 15352 flow [2024-01-31 16:53:46,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 763 transitions, 14940 flow, removed 206 selfloop flow, removed 2 redundant places. [2024-01-31 16:53:46,271 INFO L231 Difference]: Finished difference. Result has 366 places, 715 transitions, 13372 flow [2024-01-31 16:53:46,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=12449, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13372, PETRI_PLACES=366, PETRI_TRANSITIONS=715} [2024-01-31 16:53:46,272 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 345 predicate places. [2024-01-31 16:53:46,272 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 715 transitions, 13372 flow [2024-01-31 16:53:46,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 16:53:46,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:46,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:46,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:46,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:46,478 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:46,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1086452014, now seen corresponding path program 41 times [2024-01-31 16:53:46,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:46,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731131349] [2024-01-31 16:53:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:46,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:46,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:46,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731131349] [2024-01-31 16:53:46,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731131349] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:46,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846725932] [2024-01-31 16:53:46,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:46,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:46,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:46,642 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:46,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-01-31 16:53:46,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:53:46,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:46,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:46,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:46,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:46,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846725932] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:46,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:46,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-31 16:53:46,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730549771] [2024-01-31 16:53:46,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:46,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:53:46,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:46,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:53:46,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:53:46,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:46,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 715 transitions, 13372 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 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 16:53:46,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:46,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:46,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:47,902 INFO L124 PetriNetUnfolderBase]: 1463/2523 cut-off events. [2024-01-31 16:53:47,902 INFO L125 PetriNetUnfolderBase]: For 62424/62424 co-relation queries the response was YES. [2024-01-31 16:53:47,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23406 conditions, 2523 events. 1463/2523 cut-off events. For 62424/62424 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 14815 event pairs, 70 based on Foata normal form. 1/2524 useless extension candidates. Maximal degree in co-relation 23269. Up to 2091 conditions per place. [2024-01-31 16:53:47,924 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 656 selfloop transitions, 114 changer transitions 5/776 dead transitions. [2024-01-31 16:53:47,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 776 transitions, 15744 flow [2024-01-31 16:53:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-01-31 16:53:47,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684210526315789 [2024-01-31 16:53:47,925 INFO L175 Difference]: Start difference. First operand has 366 places, 715 transitions, 13372 flow. Second operand 10 states and 108 transitions. [2024-01-31 16:53:47,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 776 transitions, 15744 flow [2024-01-31 16:53:48,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 776 transitions, 15442 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:48,283 INFO L231 Difference]: Finished difference. Result has 371 places, 727 transitions, 13729 flow [2024-01-31 16:53:48,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=13080, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13729, PETRI_PLACES=371, PETRI_TRANSITIONS=727} [2024-01-31 16:53:48,284 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 350 predicate places. [2024-01-31 16:53:48,284 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 727 transitions, 13729 flow [2024-01-31 16:53:48,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 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 16:53:48,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:48,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:48,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-01-31 16:53:48,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-01-31 16:53:48,485 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:48,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash 501118992, now seen corresponding path program 42 times [2024-01-31 16:53:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:48,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378725339] [2024-01-31 16:53:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:48,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:48,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:48,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378725339] [2024-01-31 16:53:48,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378725339] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:48,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027905181] [2024-01-31 16:53:48,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:48,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:48,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:48,637 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:48,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-01-31 16:53:48,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:53:48,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:48,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:48,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:48,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:48,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027905181] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:48,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:48,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2024-01-31 16:53:48,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825256327] [2024-01-31 16:53:48,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:48,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:53:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:48,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:53:48,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:53:48,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:48,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 727 transitions, 13729 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 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 16:53:48,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:48,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:48,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:49,899 INFO L124 PetriNetUnfolderBase]: 1497/2590 cut-off events. [2024-01-31 16:53:49,900 INFO L125 PetriNetUnfolderBase]: For 66515/66515 co-relation queries the response was YES. [2024-01-31 16:53:49,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24169 conditions, 2590 events. 1497/2590 cut-off events. For 66515/66515 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 15349 event pairs, 65 based on Foata normal form. 2/2592 useless extension candidates. Maximal degree in co-relation 24029. Up to 2330 conditions per place. [2024-01-31 16:53:49,926 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 689 selfloop transitions, 73 changer transitions 14/777 dead transitions. [2024-01-31 16:53:49,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 777 transitions, 15822 flow [2024-01-31 16:53:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2024-01-31 16:53:49,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2024-01-31 16:53:49,927 INFO L175 Difference]: Start difference. First operand has 371 places, 727 transitions, 13729 flow. Second operand 10 states and 96 transitions. [2024-01-31 16:53:49,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 777 transitions, 15822 flow [2024-01-31 16:53:50,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 777 transitions, 15467 flow, removed 102 selfloop flow, removed 5 redundant places. [2024-01-31 16:53:50,324 INFO L231 Difference]: Finished difference. Result has 380 places, 739 transitions, 13890 flow [2024-01-31 16:53:50,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=13378, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13890, PETRI_PLACES=380, PETRI_TRANSITIONS=739} [2024-01-31 16:53:50,325 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 359 predicate places. [2024-01-31 16:53:50,325 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 739 transitions, 13890 flow [2024-01-31 16:53:50,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 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 16:53:50,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:50,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:50,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:50,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:50,528 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:50,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1685511058, now seen corresponding path program 43 times [2024-01-31 16:53:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:50,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526950422] [2024-01-31 16:53:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:50,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:50,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526950422] [2024-01-31 16:53:50,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526950422] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:50,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240539932] [2024-01-31 16:53:50,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:50,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:50,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:50,723 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:50,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-01-31 16:53:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:50,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:50,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:50,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:51,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240539932] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:51,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:51,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2024-01-31 16:53:51,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238059397] [2024-01-31 16:53:51,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:51,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:53:51,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:51,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:53:51,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:53:51,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:51,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 739 transitions, 13890 flow. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 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 16:53:51,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:51,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:51,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:51,906 INFO L124 PetriNetUnfolderBase]: 1523/2630 cut-off events. [2024-01-31 16:53:51,906 INFO L125 PetriNetUnfolderBase]: For 68068/68068 co-relation queries the response was YES. [2024-01-31 16:53:51,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24572 conditions, 2630 events. 1523/2630 cut-off events. For 68068/68068 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 15557 event pairs, 70 based on Foata normal form. 1/2631 useless extension candidates. Maximal degree in co-relation 24427. Up to 2335 conditions per place. [2024-01-31 16:53:51,935 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 697 selfloop transitions, 89 changer transitions 6/793 dead transitions. [2024-01-31 16:53:51,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 793 transitions, 16136 flow [2024-01-31 16:53:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:53:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:53:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-01-31 16:53:51,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5855263157894737 [2024-01-31 16:53:51,936 INFO L175 Difference]: Start difference. First operand has 380 places, 739 transitions, 13890 flow. Second operand 8 states and 89 transitions. [2024-01-31 16:53:51,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 793 transitions, 16136 flow [2024-01-31 16:53:52,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 793 transitions, 15797 flow, removed 121 selfloop flow, removed 5 redundant places. [2024-01-31 16:53:52,361 INFO L231 Difference]: Finished difference. Result has 382 places, 756 transitions, 14188 flow [2024-01-31 16:53:52,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=13563, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14188, PETRI_PLACES=382, PETRI_TRANSITIONS=756} [2024-01-31 16:53:52,362 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 361 predicate places. [2024-01-31 16:53:52,362 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 756 transitions, 14188 flow [2024-01-31 16:53:52,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 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 16:53:52,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:52,362 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:52,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-01-31 16:53:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:52,563 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:52,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1340918666, now seen corresponding path program 44 times [2024-01-31 16:53:52,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:52,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549315487] [2024-01-31 16:53:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:52,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:52,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:52,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549315487] [2024-01-31 16:53:52,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549315487] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:52,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034690899] [2024-01-31 16:53:52,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:52,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:52,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:52,748 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:52,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-01-31 16:53:52,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:52,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:52,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:52,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:52,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:53,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034690899] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:53,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:53,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-31 16:53:53,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270832259] [2024-01-31 16:53:53,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:53,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:53:53,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:53,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:53:53,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:53:53,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:53,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 756 transitions, 14188 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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 16:53:53,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:53,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:53,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:54,005 INFO L124 PetriNetUnfolderBase]: 1520/2620 cut-off events. [2024-01-31 16:53:54,005 INFO L125 PetriNetUnfolderBase]: For 65976/65976 co-relation queries the response was YES. [2024-01-31 16:53:54,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24276 conditions, 2620 events. 1520/2620 cut-off events. For 65976/65976 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 15452 event pairs, 69 based on Foata normal form. 1/2621 useless extension candidates. Maximal degree in co-relation 24130. Up to 2222 conditions per place. [2024-01-31 16:53:54,034 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 678 selfloop transitions, 111 changer transitions 5/795 dead transitions. [2024-01-31 16:53:54,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 795 transitions, 16154 flow [2024-01-31 16:53:54,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:53:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:53:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-01-31 16:53:54,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2024-01-31 16:53:54,035 INFO L175 Difference]: Start difference. First operand has 382 places, 756 transitions, 14188 flow. Second operand 10 states and 100 transitions. [2024-01-31 16:53:54,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 795 transitions, 16154 flow [2024-01-31 16:53:54,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 795 transitions, 15880 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-01-31 16:53:54,443 INFO L231 Difference]: Finished difference. Result has 387 places, 758 transitions, 14270 flow [2024-01-31 16:53:54,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=13920, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14270, PETRI_PLACES=387, PETRI_TRANSITIONS=758} [2024-01-31 16:53:54,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 366 predicate places. [2024-01-31 16:53:54,444 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 758 transitions, 14270 flow [2024-01-31 16:53:54,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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 16:53:54,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:54,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:54,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-01-31 16:53:54,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-01-31 16:53:54,652 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:54,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash 182085558, now seen corresponding path program 45 times [2024-01-31 16:53:54,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:54,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063696131] [2024-01-31 16:53:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:54,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:54,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:54,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063696131] [2024-01-31 16:53:54,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063696131] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:54,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235901697] [2024-01-31 16:53:54,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:54,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:54,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:54,814 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:54,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-01-31 16:53:54,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:53:54,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:54,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 16:53:54,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:55,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:55,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235901697] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:55,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:55,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2024-01-31 16:53:55,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565627456] [2024-01-31 16:53:55,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:55,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:53:55,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:55,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:53:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:53:55,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:55,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 758 transitions, 14270 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:55,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:55,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:55,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:56,011 INFO L124 PetriNetUnfolderBase]: 1517/2610 cut-off events. [2024-01-31 16:53:56,012 INFO L125 PetriNetUnfolderBase]: For 63779/63779 co-relation queries the response was YES. [2024-01-31 16:53:56,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24157 conditions, 2610 events. 1517/2610 cut-off events. For 63779/63779 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 15373 event pairs, 67 based on Foata normal form. 1/2611 useless extension candidates. Maximal degree in co-relation 24010. Up to 2326 conditions per place. [2024-01-31 16:53:56,043 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 697 selfloop transitions, 87 changer transitions 7/792 dead transitions. [2024-01-31 16:53:56,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 792 transitions, 16061 flow [2024-01-31 16:53:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:53:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:53:56,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-01-31 16:53:56,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380116959064327 [2024-01-31 16:53:56,044 INFO L175 Difference]: Start difference. First operand has 387 places, 758 transitions, 14270 flow. Second operand 9 states and 92 transitions. [2024-01-31 16:53:56,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 792 transitions, 16061 flow [2024-01-31 16:53:56,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 792 transitions, 15806 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-01-31 16:53:56,451 INFO L231 Difference]: Finished difference. Result has 390 places, 759 transitions, 14267 flow [2024-01-31 16:53:56,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=14019, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14267, PETRI_PLACES=390, PETRI_TRANSITIONS=759} [2024-01-31 16:53:56,452 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 369 predicate places. [2024-01-31 16:53:56,452 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 759 transitions, 14267 flow [2024-01-31 16:53:56,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:53:56,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:56,452 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:56,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:56,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-01-31 16:53:56,656 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:56,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:56,656 INFO L85 PathProgramCache]: Analyzing trace with hash 591774952, now seen corresponding path program 46 times [2024-01-31 16:53:56,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:56,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023630440] [2024-01-31 16:53:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:56,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:56,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:56,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023630440] [2024-01-31 16:53:56,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023630440] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:56,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315462424] [2024-01-31 16:53:56,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:56,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:56,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:56,719 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:56,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-01-31 16:53:56,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:56,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:53:56,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:56,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:56,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315462424] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:56,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:56,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-01-31 16:53:56,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752348491] [2024-01-31 16:53:56,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:56,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:53:56,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:56,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:53:56,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:53:56,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:56,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 759 transitions, 14267 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 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 16:53:56,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:56,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:56,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:57,933 INFO L124 PetriNetUnfolderBase]: 2032/3512 cut-off events. [2024-01-31 16:53:57,933 INFO L125 PetriNetUnfolderBase]: For 89501/89501 co-relation queries the response was YES. [2024-01-31 16:53:57,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32103 conditions, 3512 events. 2032/3512 cut-off events. For 89501/89501 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 21759 event pairs, 133 based on Foata normal form. 14/3526 useless extension candidates. Maximal degree in co-relation 31955. Up to 1011 conditions per place. [2024-01-31 16:53:57,974 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 639 selfloop transitions, 419 changer transitions 0/1059 dead transitions. [2024-01-31 16:53:57,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1059 transitions, 21594 flow [2024-01-31 16:53:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:53:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:53:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2024-01-31 16:53:57,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777327935222672 [2024-01-31 16:53:57,975 INFO L175 Difference]: Start difference. First operand has 390 places, 759 transitions, 14267 flow. Second operand 13 states and 118 transitions. [2024-01-31 16:53:57,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1059 transitions, 21594 flow [2024-01-31 16:53:58,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1059 transitions, 21330 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-01-31 16:53:58,529 INFO L231 Difference]: Finished difference. Result has 403 places, 917 transitions, 18738 flow [2024-01-31 16:53:58,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=14084, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18738, PETRI_PLACES=403, PETRI_TRANSITIONS=917} [2024-01-31 16:53:58,530 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 382 predicate places. [2024-01-31 16:53:58,530 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 917 transitions, 18738 flow [2024-01-31 16:53:58,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 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 16:53:58,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:58,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:58,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-01-31 16:53:58,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-01-31 16:53:58,733 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:58,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:58,733 INFO L85 PathProgramCache]: Analyzing trace with hash 628980103, now seen corresponding path program 47 times [2024-01-31 16:53:58,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:58,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004133115] [2024-01-31 16:53:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:58,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:58,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:58,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004133115] [2024-01-31 16:53:58,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004133115] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:58,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406136427] [2024-01-31 16:53:58,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:58,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:58,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:58,796 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:58,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-01-31 16:53:58,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:53:58,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:58,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:53:58,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:58,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:53:58,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406136427] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:58,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:58,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-01-31 16:53:58,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730167145] [2024-01-31 16:53:58,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:58,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:53:58,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:58,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:53:58,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:53:58,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:53:58,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 917 transitions, 18738 flow. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 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 16:53:58,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:58,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:53:58,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:00,164 INFO L124 PetriNetUnfolderBase]: 2037/3529 cut-off events. [2024-01-31 16:54:00,164 INFO L125 PetriNetUnfolderBase]: For 101205/101205 co-relation queries the response was YES. [2024-01-31 16:54:00,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33910 conditions, 3529 events. 2037/3529 cut-off events. For 101205/101205 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22012 event pairs, 389 based on Foata normal form. 4/3533 useless extension candidates. Maximal degree in co-relation 33755. Up to 2203 conditions per place. [2024-01-31 16:54:00,210 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 777 selfloop transitions, 247 changer transitions 15/1040 dead transitions. [2024-01-31 16:54:00,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1040 transitions, 22802 flow [2024-01-31 16:54:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:54:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:54:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-01-31 16:54:00,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029239766081871 [2024-01-31 16:54:00,210 INFO L175 Difference]: Start difference. First operand has 403 places, 917 transitions, 18738 flow. Second operand 9 states and 86 transitions. [2024-01-31 16:54:00,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1040 transitions, 22802 flow [2024-01-31 16:54:00,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1040 transitions, 22420 flow, removed 100 selfloop flow, removed 3 redundant places. [2024-01-31 16:54:00,945 INFO L231 Difference]: Finished difference. Result has 411 places, 915 transitions, 18814 flow [2024-01-31 16:54:00,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=18356, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=917, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18814, PETRI_PLACES=411, PETRI_TRANSITIONS=915} [2024-01-31 16:54:00,946 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 390 predicate places. [2024-01-31 16:54:00,946 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 915 transitions, 18814 flow [2024-01-31 16:54:00,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 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 16:54:00,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:00,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:00,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-01-31 16:54:01,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:01,154 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:01,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1947430600, now seen corresponding path program 48 times [2024-01-31 16:54:01,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:01,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611833807] [2024-01-31 16:54:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:01,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:01,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:01,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611833807] [2024-01-31 16:54:01,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611833807] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:01,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615168849] [2024-01-31 16:54:01,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:54:01,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:01,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:01,218 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:01,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-01-31 16:54:01,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:54:01,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:01,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:01,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:01,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:01,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615168849] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:01,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:01,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-31 16:54:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154584162] [2024-01-31 16:54:01,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:01,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:54:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:54:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:54:01,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:01,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 915 transitions, 18814 flow. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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 16:54:01,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:01,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:01,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:02,657 INFO L124 PetriNetUnfolderBase]: 2131/3681 cut-off events. [2024-01-31 16:54:02,658 INFO L125 PetriNetUnfolderBase]: For 108341/108341 co-relation queries the response was YES. [2024-01-31 16:54:02,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35610 conditions, 3681 events. 2131/3681 cut-off events. For 108341/108341 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23115 event pairs, 221 based on Foata normal form. 18/3699 useless extension candidates. Maximal degree in co-relation 35452. Up to 1498 conditions per place. [2024-01-31 16:54:02,704 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 638 selfloop transitions, 371 changer transitions 0/1010 dead transitions. [2024-01-31 16:54:02,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 1010 transitions, 22253 flow [2024-01-31 16:54:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:54:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:54:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 152 transitions. [2024-01-31 16:54:02,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-01-31 16:54:02,705 INFO L175 Difference]: Start difference. First operand has 411 places, 915 transitions, 18814 flow. Second operand 19 states and 152 transitions. [2024-01-31 16:54:02,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 1010 transitions, 22253 flow [2024-01-31 16:54:03,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 1010 transitions, 21669 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-01-31 16:54:03,482 INFO L231 Difference]: Finished difference. Result has 426 places, 958 transitions, 20086 flow [2024-01-31 16:54:03,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=18245, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20086, PETRI_PLACES=426, PETRI_TRANSITIONS=958} [2024-01-31 16:54:03,482 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 405 predicate places. [2024-01-31 16:54:03,482 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 958 transitions, 20086 flow [2024-01-31 16:54:03,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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 16:54:03,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:03,483 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:03,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-01-31 16:54:03,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-01-31 16:54:03,683 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:03,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:03,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1195668396, now seen corresponding path program 49 times [2024-01-31 16:54:03,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:03,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015174501] [2024-01-31 16:54:03,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:03,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:03,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:03,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015174501] [2024-01-31 16:54:03,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015174501] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:03,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190030366] [2024-01-31 16:54:03,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:54:03,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:03,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:03,752 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:03,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-01-31 16:54:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:03,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:03,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:03,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:03,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190030366] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:03,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:03,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-01-31 16:54:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139373066] [2024-01-31 16:54:03,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:03,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:54:03,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:54:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:54:03,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:03,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 958 transitions, 20086 flow. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:03,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:03,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:03,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:05,523 INFO L124 PetriNetUnfolderBase]: 2275/3915 cut-off events. [2024-01-31 16:54:05,523 INFO L125 PetriNetUnfolderBase]: For 131672/131672 co-relation queries the response was YES. [2024-01-31 16:54:05,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39826 conditions, 3915 events. 2275/3915 cut-off events. For 131672/131672 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 24745 event pairs, 183 based on Foata normal form. 22/3937 useless extension candidates. Maximal degree in co-relation 39664. Up to 1365 conditions per place. [2024-01-31 16:54:05,565 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 533 selfloop transitions, 541 changer transitions 0/1075 dead transitions. [2024-01-31 16:54:05,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1075 transitions, 25032 flow [2024-01-31 16:54:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:54:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:54:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 188 transitions. [2024-01-31 16:54:05,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2024-01-31 16:54:05,566 INFO L175 Difference]: Start difference. First operand has 426 places, 958 transitions, 20086 flow. Second operand 24 states and 188 transitions. [2024-01-31 16:54:05,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1075 transitions, 25032 flow [2024-01-31 16:54:06,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1075 transitions, 24434 flow, removed 223 selfloop flow, removed 3 redundant places. [2024-01-31 16:54:06,252 INFO L231 Difference]: Finished difference. Result has 452 places, 1034 transitions, 23603 flow [2024-01-31 16:54:06,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=19696, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=23603, PETRI_PLACES=452, PETRI_TRANSITIONS=1034} [2024-01-31 16:54:06,252 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2024-01-31 16:54:06,253 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 1034 transitions, 23603 flow [2024-01-31 16:54:06,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:06,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:06,253 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:06,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-01-31 16:54:06,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:06,453 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:06,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:06,453 INFO L85 PathProgramCache]: Analyzing trace with hash 95367590, now seen corresponding path program 50 times [2024-01-31 16:54:06,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:06,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661135460] [2024-01-31 16:54:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:06,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:06,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:06,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661135460] [2024-01-31 16:54:06,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661135460] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:06,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721094867] [2024-01-31 16:54:06,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:54:06,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:06,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:06,514 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:06,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-01-31 16:54:06,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:54:06,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:06,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:06,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:06,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:06,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721094867] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:06,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:06,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-01-31 16:54:06,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992399678] [2024-01-31 16:54:06,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:06,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:54:06,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:06,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:54:06,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:54:06,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:06,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 1034 transitions, 23603 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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 16:54:06,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:06,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:06,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:08,265 INFO L124 PetriNetUnfolderBase]: 2273/3921 cut-off events. [2024-01-31 16:54:08,265 INFO L125 PetriNetUnfolderBase]: For 131497/131497 co-relation queries the response was YES. [2024-01-31 16:54:08,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41285 conditions, 3921 events. 2273/3921 cut-off events. For 131497/131497 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25007 event pairs, 294 based on Foata normal form. 8/3929 useless extension candidates. Maximal degree in co-relation 41116. Up to 1740 conditions per place. [2024-01-31 16:54:08,313 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 594 selfloop transitions, 468 changer transitions 4/1067 dead transitions. [2024-01-31 16:54:08,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1067 transitions, 25972 flow [2024-01-31 16:54:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:54:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:54:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2024-01-31 16:54:08,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40166204986149584 [2024-01-31 16:54:08,314 INFO L175 Difference]: Start difference. First operand has 452 places, 1034 transitions, 23603 flow. Second operand 19 states and 145 transitions. [2024-01-31 16:54:08,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1067 transitions, 25972 flow [2024-01-31 16:54:09,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1067 transitions, 23952 flow, removed 760 selfloop flow, removed 14 redundant places. [2024-01-31 16:54:09,210 INFO L231 Difference]: Finished difference. Result has 458 places, 1032 transitions, 22533 flow [2024-01-31 16:54:09,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=21584, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=22533, PETRI_PLACES=458, PETRI_TRANSITIONS=1032} [2024-01-31 16:54:09,211 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 437 predicate places. [2024-01-31 16:54:09,211 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1032 transitions, 22533 flow [2024-01-31 16:54:09,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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 16:54:09,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:09,213 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:09,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-01-31 16:54:09,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:09,413 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:09,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:09,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1082565, now seen corresponding path program 51 times [2024-01-31 16:54:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:09,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011524101] [2024-01-31 16:54:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:09,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:09,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011524101] [2024-01-31 16:54:09,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011524101] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547509943] [2024-01-31 16:54:09,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:54:09,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:09,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:09,481 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:09,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-01-31 16:54:09,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:54:09,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:09,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:09,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:09,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:09,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547509943] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:09,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:09,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-31 16:54:09,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17923412] [2024-01-31 16:54:09,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:09,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:54:09,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:09,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:54:09,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:54:09,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:09,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1032 transitions, 22533 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 16:54:09,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:09,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:09,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:11,086 INFO L124 PetriNetUnfolderBase]: 2297/3973 cut-off events. [2024-01-31 16:54:11,086 INFO L125 PetriNetUnfolderBase]: For 109826/109826 co-relation queries the response was YES. [2024-01-31 16:54:11,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39545 conditions, 3973 events. 2297/3973 cut-off events. For 109826/109826 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 25380 event pairs, 459 based on Foata normal form. 16/3989 useless extension candidates. Maximal degree in co-relation 39378. Up to 2861 conditions per place. [2024-01-31 16:54:11,138 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 840 selfloop transitions, 302 changer transitions 12/1155 dead transitions. [2024-01-31 16:54:11,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 1155 transitions, 27115 flow [2024-01-31 16:54:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:54:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:54:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 124 transitions. [2024-01-31 16:54:11,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43508771929824563 [2024-01-31 16:54:11,139 INFO L175 Difference]: Start difference. First operand has 458 places, 1032 transitions, 22533 flow. Second operand 15 states and 124 transitions. [2024-01-31 16:54:11,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 1155 transitions, 27115 flow [2024-01-31 16:54:11,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1155 transitions, 26398 flow, removed 29 selfloop flow, removed 13 redundant places. [2024-01-31 16:54:11,970 INFO L231 Difference]: Finished difference. Result has 462 places, 1056 transitions, 23284 flow [2024-01-31 16:54:11,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=21817, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1032, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23284, PETRI_PLACES=462, PETRI_TRANSITIONS=1056} [2024-01-31 16:54:11,971 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 441 predicate places. [2024-01-31 16:54:11,971 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1056 transitions, 23284 flow [2024-01-31 16:54:11,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 16:54:11,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:11,972 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:11,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-01-31 16:54:12,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:12,172 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:12,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2022024978, now seen corresponding path program 52 times [2024-01-31 16:54:12,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:12,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000969186] [2024-01-31 16:54:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:12,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000969186] [2024-01-31 16:54:12,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000969186] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317612220] [2024-01-31 16:54:12,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:54:12,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:12,244 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:12,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-01-31 16:54:12,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:54:12,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:12,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:12,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:12,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:12,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317612220] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:12,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:12,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-01-31 16:54:12,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071536899] [2024-01-31 16:54:12,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:12,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:54:12,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:12,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:54:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:54:12,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:12,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1056 transitions, 23284 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:12,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:12,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:12,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:14,068 INFO L124 PetriNetUnfolderBase]: 2369/4097 cut-off events. [2024-01-31 16:54:14,068 INFO L125 PetriNetUnfolderBase]: For 116304/116304 co-relation queries the response was YES. [2024-01-31 16:54:14,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40864 conditions, 4097 events. 2369/4097 cut-off events. For 116304/116304 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 26309 event pairs, 215 based on Foata normal form. 14/4111 useless extension candidates. Maximal degree in co-relation 40694. Up to 1497 conditions per place. [2024-01-31 16:54:14,113 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 660 selfloop transitions, 479 changer transitions 0/1140 dead transitions. [2024-01-31 16:54:14,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1140 transitions, 26587 flow [2024-01-31 16:54:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:54:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:54:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 164 transitions. [2024-01-31 16:54:14,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2024-01-31 16:54:14,114 INFO L175 Difference]: Start difference. First operand has 462 places, 1056 transitions, 23284 flow. Second operand 21 states and 164 transitions. [2024-01-31 16:54:14,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1140 transitions, 26587 flow [2024-01-31 16:54:14,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 1140 transitions, 25571 flow, removed 180 selfloop flow, removed 11 redundant places. [2024-01-31 16:54:14,933 INFO L231 Difference]: Finished difference. Result has 475 places, 1095 transitions, 24317 flow [2024-01-31 16:54:14,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=22278, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1056, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=24317, PETRI_PLACES=475, PETRI_TRANSITIONS=1095} [2024-01-31 16:54:14,934 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 454 predicate places. [2024-01-31 16:54:14,934 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 1095 transitions, 24317 flow [2024-01-31 16:54:14,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:14,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:14,935 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:14,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:15,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:15,146 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:15,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:15,147 INFO L85 PathProgramCache]: Analyzing trace with hash 217525213, now seen corresponding path program 53 times [2024-01-31 16:54:15,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:15,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120232903] [2024-01-31 16:54:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:15,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:15,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:15,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120232903] [2024-01-31 16:54:15,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120232903] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:15,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639083713] [2024-01-31 16:54:15,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:54:15,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:15,208 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:15,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-01-31 16:54:15,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:54:15,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:15,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:15,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:15,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:15,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639083713] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:15,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:15,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-01-31 16:54:15,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924498501] [2024-01-31 16:54:15,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:15,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:54:15,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:15,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:54:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:54:15,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:15,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 1095 transitions, 24317 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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 16:54:15,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:15,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:15,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:17,262 INFO L124 PetriNetUnfolderBase]: 2584/4386 cut-off events. [2024-01-31 16:54:17,263 INFO L125 PetriNetUnfolderBase]: For 127697/127697 co-relation queries the response was YES. [2024-01-31 16:54:17,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44917 conditions, 4386 events. 2584/4386 cut-off events. For 127697/127697 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 27945 event pairs, 506 based on Foata normal form. 24/4410 useless extension candidates. Maximal degree in co-relation 44742. Up to 3130 conditions per place. [2024-01-31 16:54:17,326 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 801 selfloop transitions, 516 changer transitions 1/1319 dead transitions. [2024-01-31 16:54:17,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 1319 transitions, 31552 flow [2024-01-31 16:54:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 16:54:17,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 16:54:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 204 transitions. [2024-01-31 16:54:17,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38345864661654133 [2024-01-31 16:54:17,327 INFO L175 Difference]: Start difference. First operand has 475 places, 1095 transitions, 24317 flow. Second operand 28 states and 204 transitions. [2024-01-31 16:54:17,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 1319 transitions, 31552 flow [2024-01-31 16:54:18,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1319 transitions, 31136 flow, removed 90 selfloop flow, removed 10 redundant places. [2024-01-31 16:54:18,320 INFO L231 Difference]: Finished difference. Result has 498 places, 1232 transitions, 28828 flow [2024-01-31 16:54:18,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=23548, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=28828, PETRI_PLACES=498, PETRI_TRANSITIONS=1232} [2024-01-31 16:54:18,321 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 477 predicate places. [2024-01-31 16:54:18,321 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1232 transitions, 28828 flow [2024-01-31 16:54:18,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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 16:54:18,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:18,321 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:18,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-01-31 16:54:18,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-01-31 16:54:18,522 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:18,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:18,522 INFO L85 PathProgramCache]: Analyzing trace with hash 581411205, now seen corresponding path program 54 times [2024-01-31 16:54:18,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:18,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889863673] [2024-01-31 16:54:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:18,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:18,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:18,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889863673] [2024-01-31 16:54:18,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889863673] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:18,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974994688] [2024-01-31 16:54:18,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:54:18,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:18,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:18,584 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:18,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-01-31 16:54:18,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:54:18,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:18,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:18,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:18,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:18,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974994688] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:18,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:18,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-01-31 16:54:18,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963660617] [2024-01-31 16:54:18,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:18,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:54:18,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:18,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:54:18,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:54:18,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:18,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1232 transitions, 28828 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 16:54:18,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:18,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:18,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:20,596 INFO L124 PetriNetUnfolderBase]: 2673/4511 cut-off events. [2024-01-31 16:54:20,596 INFO L125 PetriNetUnfolderBase]: For 141226/141226 co-relation queries the response was YES. [2024-01-31 16:54:20,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48799 conditions, 4511 events. 2673/4511 cut-off events. For 141226/141226 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28619 event pairs, 492 based on Foata normal form. 28/4539 useless extension candidates. Maximal degree in co-relation 48618. Up to 3154 conditions per place. [2024-01-31 16:54:20,657 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 921 selfloop transitions, 428 changer transitions 15/1365 dead transitions. [2024-01-31 16:54:20,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 1365 transitions, 34633 flow [2024-01-31 16:54:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:54:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:54:20,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 139 transitions. [2024-01-31 16:54:20,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43034055727554177 [2024-01-31 16:54:20,658 INFO L175 Difference]: Start difference. First operand has 498 places, 1232 transitions, 28828 flow. Second operand 17 states and 139 transitions. [2024-01-31 16:54:20,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 1365 transitions, 34633 flow [2024-01-31 16:54:21,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 1365 transitions, 32732 flow, removed 775 selfloop flow, removed 12 redundant places. [2024-01-31 16:54:21,872 INFO L231 Difference]: Finished difference. Result has 505 places, 1259 transitions, 29359 flow [2024-01-31 16:54:21,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=27278, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=29359, PETRI_PLACES=505, PETRI_TRANSITIONS=1259} [2024-01-31 16:54:21,873 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 484 predicate places. [2024-01-31 16:54:21,873 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 1259 transitions, 29359 flow [2024-01-31 16:54:21,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 16:54:21,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:21,873 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:21,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-01-31 16:54:22,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-01-31 16:54:22,084 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:22,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash 523771139, now seen corresponding path program 55 times [2024-01-31 16:54:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:22,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668535735] [2024-01-31 16:54:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:22,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:22,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668535735] [2024-01-31 16:54:22,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668535735] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414047938] [2024-01-31 16:54:22,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:54:22,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:22,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:22,145 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:22,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-01-31 16:54:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:22,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:22,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:22,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:22,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414047938] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:22,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:22,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-01-31 16:54:22,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742091951] [2024-01-31 16:54:22,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:22,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:54:22,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:54:22,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:54:22,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:22,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1259 transitions, 29359 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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 16:54:22,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:22,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:22,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:24,057 INFO L124 PetriNetUnfolderBase]: 2614/4405 cut-off events. [2024-01-31 16:54:24,057 INFO L125 PetriNetUnfolderBase]: For 136184/136184 co-relation queries the response was YES. [2024-01-31 16:54:24,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47437 conditions, 4405 events. 2614/4405 cut-off events. For 136184/136184 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 27634 event pairs, 464 based on Foata normal form. 36/4441 useless extension candidates. Maximal degree in co-relation 47253. Up to 3030 conditions per place. [2024-01-31 16:54:24,118 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 807 selfloop transitions, 514 changer transitions 12/1334 dead transitions. [2024-01-31 16:54:24,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1334 transitions, 33337 flow [2024-01-31 16:54:24,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:54:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:54:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2024-01-31 16:54:24,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41274238227146814 [2024-01-31 16:54:24,119 INFO L175 Difference]: Start difference. First operand has 505 places, 1259 transitions, 29359 flow. Second operand 19 states and 149 transitions. [2024-01-31 16:54:24,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1334 transitions, 33337 flow [2024-01-31 16:54:25,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1334 transitions, 32638 flow, removed 149 selfloop flow, removed 10 redundant places. [2024-01-31 16:54:25,269 INFO L231 Difference]: Finished difference. Result has 512 places, 1244 transitions, 29451 flow [2024-01-31 16:54:25,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=28611, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=29451, PETRI_PLACES=512, PETRI_TRANSITIONS=1244} [2024-01-31 16:54:25,270 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 491 predicate places. [2024-01-31 16:54:25,270 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 1244 transitions, 29451 flow [2024-01-31 16:54:25,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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 16:54:25,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:25,271 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:25,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:25,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-01-31 16:54:25,471 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:25,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:25,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1281100082, now seen corresponding path program 56 times [2024-01-31 16:54:25,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:25,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206413736] [2024-01-31 16:54:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:25,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:25,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:25,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206413736] [2024-01-31 16:54:25,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206413736] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:25,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140025262] [2024-01-31 16:54:25,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:54:25,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:25,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:25,535 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:25,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-01-31 16:54:25,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:54:25,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:25,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:25,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:25,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:25,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140025262] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:25,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:25,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-31 16:54:25,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607762477] [2024-01-31 16:54:25,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:25,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:54:25,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:54:25,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:54:25,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:25,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 1244 transitions, 29451 flow. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:25,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:25,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:25,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:27,676 INFO L124 PetriNetUnfolderBase]: 2915/4814 cut-off events. [2024-01-31 16:54:27,677 INFO L125 PetriNetUnfolderBase]: For 144580/144580 co-relation queries the response was YES. [2024-01-31 16:54:27,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53522 conditions, 4814 events. 2915/4814 cut-off events. For 144580/144580 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29982 event pairs, 276 based on Foata normal form. 20/4834 useless extension candidates. Maximal degree in co-relation 53337. Up to 1910 conditions per place. [2024-01-31 16:54:27,750 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 687 selfloop transitions, 751 changer transitions 14/1453 dead transitions. [2024-01-31 16:54:27,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1453 transitions, 38005 flow [2024-01-31 16:54:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:54:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:54:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 157 transitions. [2024-01-31 16:54:27,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39348370927318294 [2024-01-31 16:54:27,751 INFO L175 Difference]: Start difference. First operand has 512 places, 1244 transitions, 29451 flow. Second operand 21 states and 157 transitions. [2024-01-31 16:54:27,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1453 transitions, 38005 flow [2024-01-31 16:54:29,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1453 transitions, 36956 flow, removed 43 selfloop flow, removed 16 redundant places. [2024-01-31 16:54:29,045 INFO L231 Difference]: Finished difference. Result has 519 places, 1397 transitions, 35296 flow [2024-01-31 16:54:29,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=28492, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=590, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=35296, PETRI_PLACES=519, PETRI_TRANSITIONS=1397} [2024-01-31 16:54:29,046 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 498 predicate places. [2024-01-31 16:54:29,046 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1397 transitions, 35296 flow [2024-01-31 16:54:29,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:54:29,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:29,047 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:29,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-01-31 16:54:29,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:29,252 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:29,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1254812260, now seen corresponding path program 57 times [2024-01-31 16:54:29,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:29,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918097352] [2024-01-31 16:54:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:29,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:29,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:29,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918097352] [2024-01-31 16:54:29,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918097352] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:29,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296069709] [2024-01-31 16:54:29,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:54:29,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:29,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:29,317 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:29,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-01-31 16:54:29,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:54:29,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:29,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:29,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:29,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:29,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296069709] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:29,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:29,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-01-31 16:54:29,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969113234] [2024-01-31 16:54:29,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:29,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:54:29,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:29,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:54:29,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:54:29,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:29,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1397 transitions, 35296 flow. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 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 16:54:29,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:29,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:29,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:31,852 INFO L124 PetriNetUnfolderBase]: 3149/5234 cut-off events. [2024-01-31 16:54:31,852 INFO L125 PetriNetUnfolderBase]: For 160726/160726 co-relation queries the response was YES. [2024-01-31 16:54:31,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58438 conditions, 5234 events. 3149/5234 cut-off events. For 160726/160726 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33288 event pairs, 203 based on Foata normal form. 12/5246 useless extension candidates. Maximal degree in co-relation 58249. Up to 2514 conditions per place. [2024-01-31 16:54:32,083 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 1006 selfloop transitions, 555 changer transitions 0/1562 dead transitions. [2024-01-31 16:54:32,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 1562 transitions, 41278 flow [2024-01-31 16:54:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 16:54:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 16:54:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 219 transitions. [2024-01-31 16:54:32,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397459165154265 [2024-01-31 16:54:32,084 INFO L175 Difference]: Start difference. First operand has 519 places, 1397 transitions, 35296 flow. Second operand 29 states and 219 transitions. [2024-01-31 16:54:32,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 1562 transitions, 41278 flow [2024-01-31 16:54:33,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 1562 transitions, 39743 flow, removed 531 selfloop flow, removed 9 redundant places. [2024-01-31 16:54:33,600 INFO L231 Difference]: Finished difference. Result has 541 places, 1496 transitions, 37538 flow [2024-01-31 16:54:33,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=33825, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=464, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=37538, PETRI_PLACES=541, PETRI_TRANSITIONS=1496} [2024-01-31 16:54:33,602 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 520 predicate places. [2024-01-31 16:54:33,602 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1496 transitions, 37538 flow [2024-01-31 16:54:33,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 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 16:54:33,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:33,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:33,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:33,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:33,816 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:33,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1610500220, now seen corresponding path program 58 times [2024-01-31 16:54:33,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:33,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155627890] [2024-01-31 16:54:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:33,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:33,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155627890] [2024-01-31 16:54:33,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155627890] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070677494] [2024-01-31 16:54:33,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:54:33,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:33,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:33,878 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:33,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-01-31 16:54:33,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:54:33,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:33,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:33,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:34,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:34,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070677494] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:34,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:34,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2024-01-31 16:54:34,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377633416] [2024-01-31 16:54:34,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:34,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:54:34,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:34,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:54:34,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:54:34,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:34,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1496 transitions, 37538 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 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 16:54:34,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:34,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:34,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:36,741 INFO L124 PetriNetUnfolderBase]: 3267/5466 cut-off events. [2024-01-31 16:54:36,741 INFO L125 PetriNetUnfolderBase]: For 171318/171318 co-relation queries the response was YES. [2024-01-31 16:54:36,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60099 conditions, 5466 events. 3267/5466 cut-off events. For 171318/171318 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 35356 event pairs, 154 based on Foata normal form. 46/5512 useless extension candidates. Maximal degree in co-relation 59907. Up to 2087 conditions per place. [2024-01-31 16:54:36,819 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 802 selfloop transitions, 798 changer transitions 1/1602 dead transitions. [2024-01-31 16:54:36,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 1602 transitions, 42233 flow [2024-01-31 16:54:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:54:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:54:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 196 transitions. [2024-01-31 16:54:36,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967611336032389 [2024-01-31 16:54:36,821 INFO L175 Difference]: Start difference. First operand has 541 places, 1496 transitions, 37538 flow. Second operand 26 states and 196 transitions. [2024-01-31 16:54:36,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 1602 transitions, 42233 flow [2024-01-31 16:54:38,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 1602 transitions, 41665 flow, removed 219 selfloop flow, removed 7 redundant places. [2024-01-31 16:54:38,672 INFO L231 Difference]: Finished difference. Result has 561 places, 1555 transitions, 40139 flow [2024-01-31 16:54:38,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36733, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=733, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=40139, PETRI_PLACES=561, PETRI_TRANSITIONS=1555} [2024-01-31 16:54:38,674 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 540 predicate places. [2024-01-31 16:54:38,674 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 1555 transitions, 40139 flow [2024-01-31 16:54:38,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 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 16:54:38,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:38,674 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:38,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-01-31 16:54:38,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:38,885 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:38,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1749971342, now seen corresponding path program 59 times [2024-01-31 16:54:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:38,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123989402] [2024-01-31 16:54:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:38,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:38,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123989402] [2024-01-31 16:54:38,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123989402] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:38,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700935264] [2024-01-31 16:54:38,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:54:38,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:38,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:38,942 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:38,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-01-31 16:54:39,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:54:39,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:39,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:39,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:39,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:39,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700935264] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:39,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:39,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2024-01-31 16:54:39,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899664901] [2024-01-31 16:54:39,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:39,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:54:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:54:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:54:39,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:39,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 1555 transitions, 40139 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 16:54:39,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:39,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:39,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:41,962 INFO L124 PetriNetUnfolderBase]: 3358/5661 cut-off events. [2024-01-31 16:54:41,962 INFO L125 PetriNetUnfolderBase]: For 182707/182707 co-relation queries the response was YES. [2024-01-31 16:54:42,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63919 conditions, 5661 events. 3358/5661 cut-off events. For 182707/182707 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 37313 event pairs, 205 based on Foata normal form. 54/5715 useless extension candidates. Maximal degree in co-relation 63725. Up to 1821 conditions per place. [2024-01-31 16:54:42,049 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 666 selfloop transitions, 971 changer transitions 0/1638 dead transitions. [2024-01-31 16:54:42,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1638 transitions, 45085 flow [2024-01-31 16:54:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:54:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:54:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 190 transitions. [2024-01-31 16:54:42,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-31 16:54:42,050 INFO L175 Difference]: Start difference. First operand has 561 places, 1555 transitions, 40139 flow. Second operand 25 states and 190 transitions. [2024-01-31 16:54:42,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1638 transitions, 45085 flow [2024-01-31 16:54:43,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1638 transitions, 44463 flow, removed 182 selfloop flow, removed 12 redundant places. [2024-01-31 16:54:43,838 INFO L231 Difference]: Finished difference. Result has 576 places, 1587 transitions, 43591 flow [2024-01-31 16:54:43,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=38855, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=919, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=43591, PETRI_PLACES=576, PETRI_TRANSITIONS=1587} [2024-01-31 16:54:43,839 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 555 predicate places. [2024-01-31 16:54:43,839 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1587 transitions, 43591 flow [2024-01-31 16:54:43,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 16:54:43,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:43,840 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:43,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:44,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:44,050 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:44,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:44,051 INFO L85 PathProgramCache]: Analyzing trace with hash -653273750, now seen corresponding path program 60 times [2024-01-31 16:54:44,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:44,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605453169] [2024-01-31 16:54:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:44,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:44,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:44,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605453169] [2024-01-31 16:54:44,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605453169] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:44,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542566931] [2024-01-31 16:54:44,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:54:44,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:44,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:44,118 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:44,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-01-31 16:54:44,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:54:44,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:44,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:44,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:44,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:44,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542566931] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:44,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:44,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-01-31 16:54:44,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568917126] [2024-01-31 16:54:44,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:44,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:54:44,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:44,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:54:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:54:44,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:44,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1587 transitions, 43591 flow. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 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 16:54:44,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:44,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:44,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:48,152 INFO L124 PetriNetUnfolderBase]: 4208/7157 cut-off events. [2024-01-31 16:54:48,152 INFO L125 PetriNetUnfolderBase]: For 239025/239025 co-relation queries the response was YES. [2024-01-31 16:54:48,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84007 conditions, 7157 events. 4208/7157 cut-off events. For 239025/239025 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 49598 event pairs, 245 based on Foata normal form. 34/7191 useless extension candidates. Maximal degree in co-relation 83811. Up to 2402 conditions per place. [2024-01-31 16:54:48,261 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 1001 selfloop transitions, 1026 changer transitions 0/2028 dead transitions. [2024-01-31 16:54:48,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 2028 transitions, 58744 flow [2024-01-31 16:54:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-31 16:54:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-31 16:54:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 268 transitions. [2024-01-31 16:54:48,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391812865497076 [2024-01-31 16:54:48,262 INFO L175 Difference]: Start difference. First operand has 576 places, 1587 transitions, 43591 flow. Second operand 36 states and 268 transitions. [2024-01-31 16:54:48,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 2028 transitions, 58744 flow [2024-01-31 16:54:51,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 2028 transitions, 58036 flow, removed 298 selfloop flow, removed 11 redundant places. [2024-01-31 16:54:51,291 INFO L231 Difference]: Finished difference. Result has 612 places, 1961 transitions, 57121 flow [2024-01-31 16:54:51,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=42790, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=671, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=842, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=57121, PETRI_PLACES=612, PETRI_TRANSITIONS=1961} [2024-01-31 16:54:51,292 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 591 predicate places. [2024-01-31 16:54:51,292 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 1961 transitions, 57121 flow [2024-01-31 16:54:51,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 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 16:54:51,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:51,292 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:51,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:51,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:51,493 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:51,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:51,494 INFO L85 PathProgramCache]: Analyzing trace with hash 674198886, now seen corresponding path program 61 times [2024-01-31 16:54:51,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:51,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605564574] [2024-01-31 16:54:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:51,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:51,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605564574] [2024-01-31 16:54:51,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605564574] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917380322] [2024-01-31 16:54:51,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:54:51,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:51,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:51,582 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:51,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-01-31 16:54:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:51,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:54:51,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:51,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:51,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917380322] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:51,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:51,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-01-31 16:54:51,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847151216] [2024-01-31 16:54:51,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:51,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:54:51,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:54:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:54:51,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:54:51,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1961 transitions, 57121 flow. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 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 16:54:51,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:51,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:54:51,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:56,362 INFO L124 PetriNetUnfolderBase]: 4376/7409 cut-off events. [2024-01-31 16:54:56,362 INFO L125 PetriNetUnfolderBase]: For 280113/280113 co-relation queries the response was YES. [2024-01-31 16:54:56,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92258 conditions, 7409 events. 4376/7409 cut-off events. For 280113/280113 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 51583 event pairs, 581 based on Foata normal form. 16/7425 useless extension candidates. Maximal degree in co-relation 92049. Up to 3599 conditions per place. [2024-01-31 16:54:56,488 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 914 selfloop transitions, 1170 changer transitions 20/2105 dead transitions. [2024-01-31 16:54:56,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 2105 transitions, 65370 flow [2024-01-31 16:54:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:54:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:54:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 176 transitions. [2024-01-31 16:54:56,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705263157894737 [2024-01-31 16:54:56,489 INFO L175 Difference]: Start difference. First operand has 612 places, 1961 transitions, 57121 flow. Second operand 25 states and 176 transitions. [2024-01-31 16:54:56,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 2105 transitions, 65370 flow [2024-01-31 16:54:59,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 2105 transitions, 64748 flow, removed 245 selfloop flow, removed 10 redundant places. [2024-01-31 16:55:00,016 INFO L231 Difference]: Finished difference. Result has 634 places, 2039 transitions, 62782 flow [2024-01-31 16:55:00,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=56527, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=62782, PETRI_PLACES=634, PETRI_TRANSITIONS=2039} [2024-01-31 16:55:00,017 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 613 predicate places. [2024-01-31 16:55:00,017 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 2039 transitions, 62782 flow [2024-01-31 16:55:00,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 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 16:55:00,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:00,018 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:00,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-01-31 16:55:00,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2024-01-31 16:55:00,218 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:55:00,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:00,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1204854280, now seen corresponding path program 62 times [2024-01-31 16:55:00,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:00,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338694639] [2024-01-31 16:55:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:00,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:00,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:00,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338694639] [2024-01-31 16:55:00,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338694639] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:00,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561721041] [2024-01-31 16:55:00,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:55:00,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:00,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:00,285 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:00,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-01-31 16:55:00,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:55:00,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:00,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:55:00,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:00,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:00,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561721041] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:00,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:00,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2024-01-31 16:55:00,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090337154] [2024-01-31 16:55:00,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:00,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:55:00,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:00,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:55:00,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:55:00,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:55:00,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 2039 transitions, 62782 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:55:00,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:00,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:55:00,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:05,856 INFO L124 PetriNetUnfolderBase]: 4830/8115 cut-off events. [2024-01-31 16:55:05,857 INFO L125 PetriNetUnfolderBase]: For 324156/324156 co-relation queries the response was YES. [2024-01-31 16:55:05,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104764 conditions, 8115 events. 4830/8115 cut-off events. For 324156/324156 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 56571 event pairs, 219 based on Foata normal form. 22/8137 useless extension candidates. Maximal degree in co-relation 104547. Up to 2195 conditions per place. [2024-01-31 16:55:05,985 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 817 selfloop transitions, 1503 changer transitions 0/2321 dead transitions. [2024-01-31 16:55:05,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 2321 transitions, 75391 flow [2024-01-31 16:55:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:55:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:55:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 204 transitions. [2024-01-31 16:55:05,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39766081871345027 [2024-01-31 16:55:05,987 INFO L175 Difference]: Start difference. First operand has 634 places, 2039 transitions, 62782 flow. Second operand 27 states and 204 transitions. [2024-01-31 16:55:05,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 2321 transitions, 75391 flow [2024-01-31 16:55:10,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 2321 transitions, 73507 flow, removed 499 selfloop flow, removed 15 redundant places. [2024-01-31 16:55:10,670 INFO L231 Difference]: Finished difference. Result has 646 places, 2271 transitions, 73140 flow [2024-01-31 16:55:10,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=60987, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=73140, PETRI_PLACES=646, PETRI_TRANSITIONS=2271} [2024-01-31 16:55:10,672 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 625 predicate places. [2024-01-31 16:55:10,672 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 2271 transitions, 73140 flow [2024-01-31 16:55:10,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:55:10,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:10,672 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:10,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-01-31 16:55:10,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-01-31 16:55:10,873 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:55:10,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:10,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1753493484, now seen corresponding path program 63 times [2024-01-31 16:55:10,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:10,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431895073] [2024-01-31 16:55:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:10,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:10,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:10,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431895073] [2024-01-31 16:55:10,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431895073] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:10,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894778896] [2024-01-31 16:55:10,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:55:10,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:10,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:10,942 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:10,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-01-31 16:55:11,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 16:55:11,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:11,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:55:11,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:11,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:11,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894778896] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:11,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:11,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-01-31 16:55:11,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850559272] [2024-01-31 16:55:11,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:11,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:55:11,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:11,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:55:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:55:11,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:55:11,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 2271 transitions, 73140 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 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 16:55:11,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:11,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:55:11,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:17,015 INFO L124 PetriNetUnfolderBase]: 5208/8655 cut-off events. [2024-01-31 16:55:17,015 INFO L125 PetriNetUnfolderBase]: For 385145/385145 co-relation queries the response was YES. [2024-01-31 16:55:17,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117951 conditions, 8655 events. 5208/8655 cut-off events. For 385145/385145 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 60220 event pairs, 313 based on Foata normal form. 22/8677 useless extension candidates. Maximal degree in co-relation 117731. Up to 3063 conditions per place. [2024-01-31 16:55:17,150 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 751 selfloop transitions, 1771 changer transitions 0/2523 dead transitions. [2024-01-31 16:55:17,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 2523 transitions, 86370 flow [2024-01-31 16:55:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:55:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:55:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 198 transitions. [2024-01-31 16:55:17,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4008097165991903 [2024-01-31 16:55:17,151 INFO L175 Difference]: Start difference. First operand has 646 places, 2271 transitions, 73140 flow. Second operand 26 states and 198 transitions. [2024-01-31 16:55:17,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 2523 transitions, 86370 flow [2024-01-31 16:55:22,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 656 places, 2523 transitions, 85239 flow, removed 265 selfloop flow, removed 14 redundant places. [2024-01-31 16:55:22,948 INFO L231 Difference]: Finished difference. Result has 663 places, 2477 transitions, 85474 flow [2024-01-31 16:55:22,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=72004, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1573, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=85474, PETRI_PLACES=663, PETRI_TRANSITIONS=2477} [2024-01-31 16:55:22,950 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 642 predicate places. [2024-01-31 16:55:22,950 INFO L495 AbstractCegarLoop]: Abstraction has has 663 places, 2477 transitions, 85474 flow [2024-01-31 16:55:22,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 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 16:55:22,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:22,950 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:22,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-01-31 16:55:23,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-01-31 16:55:23,152 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:55:23,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:23,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1645784304, now seen corresponding path program 64 times [2024-01-31 16:55:23,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:23,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686189312] [2024-01-31 16:55:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:23,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:23,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686189312] [2024-01-31 16:55:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686189312] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901430890] [2024-01-31 16:55:23,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:55:23,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:23,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:23,219 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:23,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-01-31 16:55:23,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:55:23,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:23,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:55:23,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:23,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:23,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901430890] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:23,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:23,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-01-31 16:55:23,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490154761] [2024-01-31 16:55:23,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:23,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:55:23,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:55:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:55:23,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:55:23,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 2477 transitions, 85474 flow. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 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 16:55:23,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:23,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:55:23,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:29,948 INFO L124 PetriNetUnfolderBase]: 5361/8902 cut-off events. [2024-01-31 16:55:29,948 INFO L125 PetriNetUnfolderBase]: For 446808/446808 co-relation queries the response was YES. [2024-01-31 16:55:30,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128286 conditions, 8902 events. 5361/8902 cut-off events. For 446808/446808 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 61768 event pairs, 1383 based on Foata normal form. 42/8944 useless extension candidates. Maximal degree in co-relation 128059. Up to 8345 conditions per place. [2024-01-31 16:55:30,087 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2424 selfloop transitions, 183 changer transitions 0/2608 dead transitions. [2024-01-31 16:55:30,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 693 places, 2608 transitions, 93903 flow [2024-01-31 16:55:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 16:55:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 16:55:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 237 transitions. [2024-01-31 16:55:30,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40237691001697795 [2024-01-31 16:55:30,088 INFO L175 Difference]: Start difference. First operand has 663 places, 2477 transitions, 85474 flow. Second operand 31 states and 237 transitions. [2024-01-31 16:55:30,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 693 places, 2608 transitions, 93903 flow [2024-01-31 16:55:36,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 2608 transitions, 92294 flow, removed 670 selfloop flow, removed 13 redundant places. [2024-01-31 16:55:36,965 INFO L231 Difference]: Finished difference. Result has 692 places, 2556 transitions, 87591 flow [2024-01-31 16:55:36,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=83859, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=87591, PETRI_PLACES=692, PETRI_TRANSITIONS=2556} [2024-01-31 16:55:36,966 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 671 predicate places. [2024-01-31 16:55:36,967 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 2556 transitions, 87591 flow [2024-01-31 16:55:36,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 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 16:55:36,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:36,967 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:36,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-01-31 16:55:37,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-01-31 16:55:37,167 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:55:37,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1036956308, now seen corresponding path program 65 times [2024-01-31 16:55:37,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:37,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643074001] [2024-01-31 16:55:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:37,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:37,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:37,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643074001] [2024-01-31 16:55:37,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643074001] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:37,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100308876] [2024-01-31 16:55:37,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:55:37,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:37,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:37,232 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:37,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-01-31 16:55:37,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:55:37,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:37,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:55:37,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:37,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:37,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100308876] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:37,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:37,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-01-31 16:55:37,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665060817] [2024-01-31 16:55:37,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:37,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:55:37,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:37,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:55:37,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:55:37,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:55:37,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 2556 transitions, 87591 flow. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 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 16:55:37,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:37,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:55:37,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:44,072 INFO L124 PetriNetUnfolderBase]: 5627/9299 cut-off events. [2024-01-31 16:55:44,072 INFO L125 PetriNetUnfolderBase]: For 478235/478235 co-relation queries the response was YES. [2024-01-31 16:55:44,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133870 conditions, 9299 events. 5627/9299 cut-off events. For 478235/478235 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 64909 event pairs, 1376 based on Foata normal form. 28/9327 useless extension candidates. Maximal degree in co-relation 133630. Up to 8416 conditions per place. [2024-01-31 16:55:44,245 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2361 selfloop transitions, 358 changer transitions 23/2743 dead transitions. [2024-01-31 16:55:44,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 2743 transitions, 98977 flow [2024-01-31 16:55:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:55:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:55:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 177 transitions. [2024-01-31 16:55:44,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3726315789473684 [2024-01-31 16:55:44,246 INFO L175 Difference]: Start difference. First operand has 692 places, 2556 transitions, 87591 flow. Second operand 25 states and 177 transitions. [2024-01-31 16:55:44,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 2743 transitions, 98977 flow [2024-01-31 16:55:51,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 2743 transitions, 96652 flow, removed 1038 selfloop flow, removed 5 redundant places. [2024-01-31 16:55:51,656 INFO L231 Difference]: Finished difference. Result has 723 places, 2677 transitions, 91448 flow [2024-01-31 16:55:51,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=85474, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=91448, PETRI_PLACES=723, PETRI_TRANSITIONS=2677} [2024-01-31 16:55:51,658 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 702 predicate places. [2024-01-31 16:55:51,658 INFO L495 AbstractCegarLoop]: Abstraction has has 723 places, 2677 transitions, 91448 flow [2024-01-31 16:55:51,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 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 16:55:51,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:51,659 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:51,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-01-31 16:55:51,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:51,870 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:55:51,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:51,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1906811627, now seen corresponding path program 66 times [2024-01-31 16:55:51,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:51,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065328219] [2024-01-31 16:55:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:51,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:51,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:51,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065328219] [2024-01-31 16:55:51,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065328219] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:51,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046491600] [2024-01-31 16:55:51,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:55:51,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:51,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:51,931 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:51,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-01-31 16:55:52,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:55:52,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:52,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:55:52,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:52,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:52,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046491600] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:52,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:52,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2024-01-31 16:55:52,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093237218] [2024-01-31 16:55:52,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:52,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:55:52,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:55:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:55:52,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:55:52,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 723 places, 2677 transitions, 91448 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 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 16:55:52,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:52,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:55:52,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:59,608 INFO L124 PetriNetUnfolderBase]: 5726/9452 cut-off events. [2024-01-31 16:55:59,608 INFO L125 PetriNetUnfolderBase]: For 512053/512053 co-relation queries the response was YES. [2024-01-31 16:55:59,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136289 conditions, 9452 events. 5726/9452 cut-off events. For 512053/512053 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 66024 event pairs, 301 based on Foata normal form. 44/9496 useless extension candidates. Maximal degree in co-relation 136038. Up to 7222 conditions per place. [2024-01-31 16:55:59,773 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2225 selfloop transitions, 585 changer transitions 9/2820 dead transitions. [2024-01-31 16:55:59,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 2820 transitions, 101642 flow [2024-01-31 16:55:59,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:55:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:55:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 175 transitions. [2024-01-31 16:55:59,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41866028708133973 [2024-01-31 16:55:59,774 INFO L175 Difference]: Start difference. First operand has 723 places, 2677 transitions, 91448 flow. Second operand 22 states and 175 transitions. [2024-01-31 16:55:59,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 2820 transitions, 101642 flow [2024-01-31 16:56:07,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 2820 transitions, 99400 flow, removed 1062 selfloop flow, removed 14 redundant places. [2024-01-31 16:56:07,307 INFO L231 Difference]: Finished difference. Result has 738 places, 2760 transitions, 94543 flow [2024-01-31 16:56:07,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=89792, PETRI_DIFFERENCE_MINUEND_PLACES=708, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=94543, PETRI_PLACES=738, PETRI_TRANSITIONS=2760} [2024-01-31 16:56:07,309 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 717 predicate places. [2024-01-31 16:56:07,309 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 2760 transitions, 94543 flow [2024-01-31 16:56:07,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 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 16:56:07,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:07,309 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:56:07,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:07,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:07,511 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:56:07,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash -754751825, now seen corresponding path program 67 times [2024-01-31 16:56:07,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:07,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144258647] [2024-01-31 16:56:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:07,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:07,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:07,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144258647] [2024-01-31 16:56:07,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144258647] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:07,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79373414] [2024-01-31 16:56:07,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:56:07,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:07,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:07,574 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:07,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-01-31 16:56:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:07,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:56:07,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:07,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:07,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79373414] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:07,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:07,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2024-01-31 16:56:07,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942306087] [2024-01-31 16:56:07,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:07,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:56:07,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:07,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:56:07,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:56:07,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:56:07,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 2760 transitions, 94543 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 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 16:56:07,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:07,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:56:07,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:16,083 INFO L124 PetriNetUnfolderBase]: 5914/9730 cut-off events. [2024-01-31 16:56:16,083 INFO L125 PetriNetUnfolderBase]: For 536111/536111 co-relation queries the response was YES. [2024-01-31 16:56:16,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140648 conditions, 9730 events. 5914/9730 cut-off events. For 536111/536111 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 68021 event pairs, 255 based on Foata normal form. 76/9806 useless extension candidates. Maximal degree in co-relation 140396. Up to 7377 conditions per place. [2024-01-31 16:56:16,258 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2152 selfloop transitions, 765 changer transitions 0/2918 dead transitions. [2024-01-31 16:56:16,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 763 places, 2918 transitions, 104295 flow [2024-01-31 16:56:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:56:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:56:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 199 transitions. [2024-01-31 16:56:16,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38791423001949316 [2024-01-31 16:56:16,259 INFO L175 Difference]: Start difference. First operand has 738 places, 2760 transitions, 94543 flow. Second operand 27 states and 199 transitions. [2024-01-31 16:56:16,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 763 places, 2918 transitions, 104295 flow [2024-01-31 16:56:24,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 2918 transitions, 102716 flow, removed 703 selfloop flow, removed 12 redundant places. [2024-01-31 16:56:24,330 INFO L231 Difference]: Finished difference. Result has 759 places, 2884 transitions, 98860 flow [2024-01-31 16:56:24,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=92275, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2096, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=98860, PETRI_PLACES=759, PETRI_TRANSITIONS=2884} [2024-01-31 16:56:24,332 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 738 predicate places. [2024-01-31 16:56:24,332 INFO L495 AbstractCegarLoop]: Abstraction has has 759 places, 2884 transitions, 98860 flow [2024-01-31 16:56:24,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 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 16:56:24,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:24,333 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:56:24,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:24,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:24,544 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:56:24,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:24,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1856255220, now seen corresponding path program 68 times [2024-01-31 16:56:24,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:24,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043604773] [2024-01-31 16:56:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:24,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:24,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:24,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043604773] [2024-01-31 16:56:24,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043604773] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:24,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802688656] [2024-01-31 16:56:24,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:56:24,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:24,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:24,604 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:24,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-01-31 16:56:24,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:56:24,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:24,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:56:24,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:24,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:24,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802688656] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:24,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:24,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2024-01-31 16:56:24,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866747398] [2024-01-31 16:56:24,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:24,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:56:24,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:56:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:56:24,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2024-01-31 16:56:24,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 2884 transitions, 98860 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 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 16:56:24,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:24,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2024-01-31 16:56:24,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:33,482 INFO L124 PetriNetUnfolderBase]: 6050/9952 cut-off events. [2024-01-31 16:56:33,483 INFO L125 PetriNetUnfolderBase]: For 528491/528491 co-relation queries the response was YES. [2024-01-31 16:56:33,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144814 conditions, 9952 events. 6050/9952 cut-off events. For 528491/528491 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 69863 event pairs, 1473 based on Foata normal form. 44/9996 useless extension candidates. Maximal degree in co-relation 144558. Up to 8975 conditions per place. [2024-01-31 16:56:33,683 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 2625 selfloop transitions, 373 changer transitions 0/2999 dead transitions. [2024-01-31 16:56:33,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 2999 transitions, 108158 flow [2024-01-31 16:56:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:56:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:56:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 198 transitions. [2024-01-31 16:56:33,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4008097165991903 [2024-01-31 16:56:33,687 INFO L175 Difference]: Start difference. First operand has 759 places, 2884 transitions, 98860 flow. Second operand 26 states and 198 transitions. [2024-01-31 16:56:33,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 2999 transitions, 108158 flow