./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.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/popl20-difference-det.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/popl20-difference-det.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-difference-det.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 17:03:42,308 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:03:42,394 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:03:42,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:03:42,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:03:42,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:03:42,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:03:42,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:03:42,431 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:03:42,435 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:03:42,435 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:03:42,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:03:42,436 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:03:42,437 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:03:42,438 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:03:42,438 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:03:42,438 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:03:42,438 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:03:42,439 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:03:42,439 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:03:42,439 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:03:42,440 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:03:42,440 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:03:42,440 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:03:42,440 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:03:42,441 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:03:42,441 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:03:42,441 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:03:42,442 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:03:42,442 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:03:42,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:03:42,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:03:42,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:03:42,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:03:42,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:03:42,444 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:03:42,444 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:03:42,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:03:42,445 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:03:42,445 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:03:42,445 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:03:42,446 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:03:42,446 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:03:42,446 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:03:42,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:03:42,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:03:42,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:03:42,709 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:03:42,710 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:03:42,711 INFO L431 ainManager$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/popl20-difference-det.wvr.yml/witness.yml [2024-01-31 17:03:42,815 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:03:42,815 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:03:42,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2024-01-31 17:03:44,011 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:03:44,206 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:03:44,207 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2024-01-31 17:03:44,212 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f12a90e1/39ba8058cb8d45deb0df135f4f0f9427/FLAG0e8f4a437 [2024-01-31 17:03:44,222 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f12a90e1/39ba8058cb8d45deb0df135f4f0f9427 [2024-01-31 17:03:44,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:03:44,224 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:03:44,225 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:03:44,225 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:03:44,230 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:03:44,230 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:03:42" (1/2) ... [2024-01-31 17:03:44,231 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121e9439 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:03:44, skipping insertion in model container [2024-01-31 17:03:44,232 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:03:42" (1/2) ... [2024-01-31 17:03:44,233 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f1995f3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:03:44, skipping insertion in model container [2024-01-31 17:03:44,234 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:03:44" (2/2) ... [2024-01-31 17:03:44,234 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121e9439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44, skipping insertion in model container [2024-01-31 17:03:44,234 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:03:44" (2/2) ... [2024-01-31 17:03:44,235 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:03:44,275 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:03:44,295 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:03:44,468 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/popl20-difference-det.wvr.c[2559,2572] [2024-01-31 17:03:44,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:03:44,480 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:03:44,500 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/popl20-difference-det.wvr.c[2559,2572] [2024-01-31 17:03:44,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:03:44,515 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:03:44,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44 WrapperNode [2024-01-31 17:03:44,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:03:44,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:03:44,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:03:44,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:03:44,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,531 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,562 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 125 [2024-01-31 17:03:44,563 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:03:44,564 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:03:44,564 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:03:44,564 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:03:44,573 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,574 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,586 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,615 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-31 17:03:44,617 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,618 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,628 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,635 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,637 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,640 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:03:44,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:03:44,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:03:44,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:03:44,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (1/1) ... [2024-01-31 17:03:44,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:03:44,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:44,674 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 17:03:44,675 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 17:03:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:03:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:03:44,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:03:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:03:44,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:03:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 17:03:44,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 17:03:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-01-31 17:03:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-01-31 17:03:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:03:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:03:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:03:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:03:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 17:03:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:03:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:03:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:03:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:03:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:03:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 17:03:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:03:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:03:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:03:44,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:03:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:03:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:03:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:03:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:03:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 17:03:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:03:44,709 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 17:03:44,814 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:03:44,815 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:03:45,061 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:03:45,061 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:03:45,212 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:03:45,213 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 17:03:45,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:03:45 BoogieIcfgContainer [2024-01-31 17:03:45,213 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:03:45,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:03:45,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:03:45,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:03:45,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:03:42" (1/4) ... [2024-01-31 17:03:45,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199663f1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:03:45, skipping insertion in model container [2024-01-31 17:03:45,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:03:44" (2/4) ... [2024-01-31 17:03:45,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199663f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:03:45, skipping insertion in model container [2024-01-31 17:03:45,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:44" (3/4) ... [2024-01-31 17:03:45,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199663f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:03:45, skipping insertion in model container [2024-01-31 17:03:45,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:03:45" (4/4) ... [2024-01-31 17:03:45,224 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2024-01-31 17:03:45,244 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:03:45,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:03:45,246 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:03:45,305 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-31 17:03:45,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 43 transitions, 114 flow [2024-01-31 17:03:45,400 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2024-01-31 17:03:45,400 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 17:03:45,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 39 events. 4/39 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-01-31 17:03:45,408 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 43 transitions, 114 flow [2024-01-31 17:03:45,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 38 transitions, 100 flow [2024-01-31 17:03:45,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:03:45,425 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;@76121a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:03:45,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-31 17:03:45,438 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:03:45,438 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2024-01-31 17:03:45,438 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 17:03:45,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:45,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:45,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:45,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:45,446 INFO L85 PathProgramCache]: Analyzing trace with hash -351203351, now seen corresponding path program 1 times [2024-01-31 17:03:45,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:45,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535095842] [2024-01-31 17:03:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:45,855 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 17:03:45,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:45,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535095842] [2024-01-31 17:03:45,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535095842] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:45,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:45,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:03:45,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655539161] [2024-01-31 17:03:45,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:45,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:03:45,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:45,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:03:45,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:03:45,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-31 17:03:45,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 17:03:45,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:45,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-31 17:03:45,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:46,444 INFO L124 PetriNetUnfolderBase]: 3661/5016 cut-off events. [2024-01-31 17:03:46,444 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-01-31 17:03:46,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10212 conditions, 5016 events. 3661/5016 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21858 event pairs, 656 based on Foata normal form. 1/5004 useless extension candidates. Maximal degree in co-relation 8256. Up to 3880 conditions per place. [2024-01-31 17:03:46,483 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 53 selfloop transitions, 5 changer transitions 1/64 dead transitions. [2024-01-31 17:03:46,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 291 flow [2024-01-31 17:03:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:03:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:03:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-01-31 17:03:46,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6744186046511628 [2024-01-31 17:03:46,499 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 100 flow. Second operand 3 states and 87 transitions. [2024-01-31 17:03:46,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 291 flow [2024-01-31 17:03:46,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 261 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-31 17:03:46,512 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 117 flow [2024-01-31 17:03:46,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2024-01-31 17:03:46,518 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2024-01-31 17:03:46,518 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 117 flow [2024-01-31 17:03:46,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 17:03:46,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:46,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:46,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:03:46,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:46,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:46,521 INFO L85 PathProgramCache]: Analyzing trace with hash 618723373, now seen corresponding path program 1 times [2024-01-31 17:03:46,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:46,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628011745] [2024-01-31 17:03:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:46,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:46,758 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 17:03:46,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:46,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628011745] [2024-01-31 17:03:46,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628011745] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:46,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:46,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:46,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290349245] [2024-01-31 17:03:46,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:46,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:46,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:46,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:46,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-31 17:03:46,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:03:46,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:46,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-31 17:03:46,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:47,610 INFO L124 PetriNetUnfolderBase]: 7886/10692 cut-off events. [2024-01-31 17:03:47,610 INFO L125 PetriNetUnfolderBase]: For 1801/1821 co-relation queries the response was YES. [2024-01-31 17:03:47,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24074 conditions, 10692 events. 7886/10692 cut-off events. For 1801/1821 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 54549 event pairs, 2450 based on Foata normal form. 0/10148 useless extension candidates. Maximal degree in co-relation 3833. Up to 5589 conditions per place. [2024-01-31 17:03:47,713 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 93 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2024-01-31 17:03:47,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 107 transitions, 510 flow [2024-01-31 17:03:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-01-31 17:03:47,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-01-31 17:03:47,718 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 117 flow. Second operand 5 states and 130 transitions. [2024-01-31 17:03:47,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 107 transitions, 510 flow [2024-01-31 17:03:47,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 107 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:47,722 INFO L231 Difference]: Finished difference. Result has 48 places, 51 transitions, 175 flow [2024-01-31 17:03:47,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=48, PETRI_TRANSITIONS=51} [2024-01-31 17:03:47,723 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2024-01-31 17:03:47,724 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 51 transitions, 175 flow [2024-01-31 17:03:47,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:03:47,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:47,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:47,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:03:47,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:47,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:47,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1105966541, now seen corresponding path program 2 times [2024-01-31 17:03:47,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:47,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263512686] [2024-01-31 17:03:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:47,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:47,884 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 17:03:47,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:47,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263512686] [2024-01-31 17:03:47,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263512686] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:47,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051451177] [2024-01-31 17:03:47,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:03:47,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:47,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:47,889 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 17:03:47,909 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 17:03:48,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:03:48,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:48,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 17:03:48,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:48,099 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 17:03:48,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:48,146 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 17:03:48,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051451177] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:48,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:48,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-01-31 17:03:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771132683] [2024-01-31 17:03:48,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:48,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 17:03:48,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:48,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 17:03:48,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-01-31 17:03:48,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-31 17:03:48,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 51 transitions, 175 flow. Second operand has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 9 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 17:03:48,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:48,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-31 17:03:48,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:49,859 INFO L124 PetriNetUnfolderBase]: 14079/18496 cut-off events. [2024-01-31 17:03:49,860 INFO L125 PetriNetUnfolderBase]: For 6346/6346 co-relation queries the response was YES. [2024-01-31 17:03:49,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47735 conditions, 18496 events. 14079/18496 cut-off events. For 6346/6346 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 93581 event pairs, 1143 based on Foata normal form. 300/18794 useless extension candidates. Maximal degree in co-relation 26866. Up to 4047 conditions per place. [2024-01-31 17:03:49,971 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 246 selfloop transitions, 36 changer transitions 0/285 dead transitions. [2024-01-31 17:03:49,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 285 transitions, 1419 flow [2024-01-31 17:03:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:03:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:03:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 352 transitions. [2024-01-31 17:03:49,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2024-01-31 17:03:49,977 INFO L175 Difference]: Start difference. First operand has 48 places, 51 transitions, 175 flow. Second operand 14 states and 352 transitions. [2024-01-31 17:03:49,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 285 transitions, 1419 flow [2024-01-31 17:03:49,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 285 transitions, 1419 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:03:49,999 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 411 flow [2024-01-31 17:03:49,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=411, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2024-01-31 17:03:50,001 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2024-01-31 17:03:50,004 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 411 flow [2024-01-31 17:03:50,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 9 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 17:03:50,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:50,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:50,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:50,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:50,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:50,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1759348672, now seen corresponding path program 1 times [2024-01-31 17:03:50,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:50,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709734423] [2024-01-31 17:03:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:50,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:50,276 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 17:03:50,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:50,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709734423] [2024-01-31 17:03:50,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709734423] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:50,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:50,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:03:50,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384410172] [2024-01-31 17:03:50,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:50,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:03:50,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:50,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:03:50,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:03:50,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-31 17:03:50,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 411 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 17:03:50,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:50,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-31 17:03:50,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:51,388 INFO L124 PetriNetUnfolderBase]: 8968/12348 cut-off events. [2024-01-31 17:03:51,388 INFO L125 PetriNetUnfolderBase]: For 16575/16671 co-relation queries the response was YES. [2024-01-31 17:03:51,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37708 conditions, 12348 events. 8968/12348 cut-off events. For 16575/16671 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64819 event pairs, 3027 based on Foata normal form. 441/12626 useless extension candidates. Maximal degree in co-relation 32708. Up to 7212 conditions per place. [2024-01-31 17:03:51,469 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 90 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-01-31 17:03:51,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 706 flow [2024-01-31 17:03:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:03:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:03:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-01-31 17:03:51,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6821705426356589 [2024-01-31 17:03:51,471 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 411 flow. Second operand 3 states and 88 transitions. [2024-01-31 17:03:51,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 706 flow [2024-01-31 17:03:51,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 107 transitions, 674 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:51,596 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 395 flow [2024-01-31 17:03:51,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=395, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2024-01-31 17:03:51,597 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2024-01-31 17:03:51,597 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 395 flow [2024-01-31 17:03:51,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 17:03:51,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:51,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:51,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:03:51,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:51,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:51,599 INFO L85 PathProgramCache]: Analyzing trace with hash -156174319, now seen corresponding path program 3 times [2024-01-31 17:03:51,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:51,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559987942] [2024-01-31 17:03:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:51,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:51,671 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 17:03:51,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559987942] [2024-01-31 17:03:51,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559987942] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:51,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:51,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731784136] [2024-01-31 17:03:51,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:51,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:51,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:51,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-31 17:03:51,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 395 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:03:51,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:51,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-31 17:03:51,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:53,190 INFO L124 PetriNetUnfolderBase]: 14153/19361 cut-off events. [2024-01-31 17:03:53,191 INFO L125 PetriNetUnfolderBase]: For 23211/23318 co-relation queries the response was YES. [2024-01-31 17:03:53,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58927 conditions, 19361 events. 14153/19361 cut-off events. For 23211/23318 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 105243 event pairs, 4373 based on Foata normal form. 57/19315 useless extension candidates. Maximal degree in co-relation 46122. Up to 9812 conditions per place. [2024-01-31 17:03:53,313 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 115 selfloop transitions, 26 changer transitions 0/152 dead transitions. [2024-01-31 17:03:53,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 152 transitions, 994 flow [2024-01-31 17:03:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-01-31 17:03:53,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-01-31 17:03:53,315 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 395 flow. Second operand 5 states and 130 transitions. [2024-01-31 17:03:53,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 152 transitions, 994 flow [2024-01-31 17:03:53,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 152 transitions, 985 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:53,461 INFO L231 Difference]: Finished difference. Result has 75 places, 94 transitions, 601 flow [2024-01-31 17:03:53,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=601, PETRI_PLACES=75, PETRI_TRANSITIONS=94} [2024-01-31 17:03:53,462 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 28 predicate places. [2024-01-31 17:03:53,462 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 94 transitions, 601 flow [2024-01-31 17:03:53,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:03:53,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:53,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:53,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:03:53,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:53,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash 711082719, now seen corresponding path program 4 times [2024-01-31 17:03:53,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:53,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315342984] [2024-01-31 17:03:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:53,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:53,532 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 17:03:53,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:53,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315342984] [2024-01-31 17:03:53,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315342984] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:53,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:53,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:53,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747796015] [2024-01-31 17:03:53,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:53,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:53,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:53,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:53,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:53,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-31 17:03:53,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 94 transitions, 601 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:03:53,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:53,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-31 17:03:53,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:55,035 INFO L124 PetriNetUnfolderBase]: 14827/20287 cut-off events. [2024-01-31 17:03:55,035 INFO L125 PetriNetUnfolderBase]: For 38844/39050 co-relation queries the response was YES. [2024-01-31 17:03:55,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66690 conditions, 20287 events. 14827/20287 cut-off events. For 38844/39050 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 112229 event pairs, 4146 based on Foata normal form. 84/20268 useless extension candidates. Maximal degree in co-relation 55360. Up to 8546 conditions per place. [2024-01-31 17:03:55,164 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 127 selfloop transitions, 20 changer transitions 0/158 dead transitions. [2024-01-31 17:03:55,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 158 transitions, 1133 flow [2024-01-31 17:03:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-01-31 17:03:55,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-01-31 17:03:55,166 INFO L175 Difference]: Start difference. First operand has 75 places, 94 transitions, 601 flow. Second operand 5 states and 132 transitions. [2024-01-31 17:03:55,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 158 transitions, 1133 flow [2024-01-31 17:03:55,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 158 transitions, 1119 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-01-31 17:03:55,461 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 658 flow [2024-01-31 17:03:55,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=658, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-01-31 17:03:55,462 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 34 predicate places. [2024-01-31 17:03:55,462 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 658 flow [2024-01-31 17:03:55,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:03:55,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:55,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:55,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:03:55,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:55,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:55,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1205243889, now seen corresponding path program 1 times [2024-01-31 17:03:55,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:55,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571584676] [2024-01-31 17:03:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:55,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:55,539 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 17:03:55,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:55,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571584676] [2024-01-31 17:03:55,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571584676] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:55,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:55,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:55,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995578790] [2024-01-31 17:03:55,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:55,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:55,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:55,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:55,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:55,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-31 17:03:55,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 658 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:03:55,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:55,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-31 17:03:55,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:56,966 INFO L124 PetriNetUnfolderBase]: 14569/19670 cut-off events. [2024-01-31 17:03:56,966 INFO L125 PetriNetUnfolderBase]: For 39429/39453 co-relation queries the response was YES. [2024-01-31 17:03:56,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65201 conditions, 19670 events. 14569/19670 cut-off events. For 39429/39453 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 105467 event pairs, 4527 based on Foata normal form. 90/19756 useless extension candidates. Maximal degree in co-relation 58863. Up to 9925 conditions per place. [2024-01-31 17:03:57,072 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 129 selfloop transitions, 25 changer transitions 0/160 dead transitions. [2024-01-31 17:03:57,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 160 transitions, 1185 flow [2024-01-31 17:03:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-01-31 17:03:57,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641860465116279 [2024-01-31 17:03:57,074 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 658 flow. Second operand 5 states and 138 transitions. [2024-01-31 17:03:57,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 160 transitions, 1185 flow [2024-01-31 17:03:57,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 160 transitions, 1142 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-31 17:03:57,280 INFO L231 Difference]: Finished difference. Result has 85 places, 98 transitions, 710 flow [2024-01-31 17:03:57,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=710, PETRI_PLACES=85, PETRI_TRANSITIONS=98} [2024-01-31 17:03:57,281 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 38 predicate places. [2024-01-31 17:03:57,281 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 98 transitions, 710 flow [2024-01-31 17:03:57,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:03:57,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:57,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:57,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 17:03:57,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:03:57,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1450918319, now seen corresponding path program 2 times [2024-01-31 17:03:57,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:57,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210742610] [2024-01-31 17:03:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:57,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:57,376 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 17:03:57,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210742610] [2024-01-31 17:03:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210742610] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439511585] [2024-01-31 17:03:57,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:03:57,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:57,380 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 17:03:57,404 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 17:03:57,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:03:57,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:57,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 17:03:57,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:57,535 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 17:03:57,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:57,561 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 17:03:57,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439511585] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:57,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:57,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-01-31 17:03:57,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352642800] [2024-01-31 17:03:57,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:57,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 17:03:57,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 17:03:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-01-31 17:03:57,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-31 17:03:57,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 710 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 17:03:57,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:57,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-31 17:03:57,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:59,525 INFO L124 PetriNetUnfolderBase]: 18703/24860 cut-off events. [2024-01-31 17:03:59,526 INFO L125 PetriNetUnfolderBase]: For 52037/52037 co-relation queries the response was YES. [2024-01-31 17:03:59,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83891 conditions, 24860 events. 18703/24860 cut-off events. For 52037/52037 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 130579 event pairs, 1321 based on Foata normal form. 192/25051 useless extension candidates. Maximal degree in co-relation 72064. Up to 4911 conditions per place. [2024-01-31 17:03:59,659 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 256 selfloop transitions, 77 changer transitions 0/336 dead transitions. [2024-01-31 17:03:59,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 336 transitions, 2369 flow [2024-01-31 17:03:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:03:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:03:59,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 340 transitions. [2024-01-31 17:03:59,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5647840531561462 [2024-01-31 17:03:59,661 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 710 flow. Second operand 14 states and 340 transitions. [2024-01-31 17:03:59,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 336 transitions, 2369 flow [2024-01-31 17:04:00,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 336 transitions, 2306 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-31 17:04:00,109 INFO L231 Difference]: Finished difference. Result has 103 places, 139 transitions, 1264 flow [2024-01-31 17:04:00,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1264, PETRI_PLACES=103, PETRI_TRANSITIONS=139} [2024-01-31 17:04:00,109 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 56 predicate places. [2024-01-31 17:04:00,110 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 139 transitions, 1264 flow [2024-01-31 17:04:00,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 17:04:00,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:00,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:00,123 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 17:04:00,314 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 17:04:00,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:04:00,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:00,315 INFO L85 PathProgramCache]: Analyzing trace with hash 623028822, now seen corresponding path program 1 times [2024-01-31 17:04:00,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:00,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662149746] [2024-01-31 17:04:00,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:00,359 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 17:04:00,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:00,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662149746] [2024-01-31 17:04:00,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662149746] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:00,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:00,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:04:00,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918761768] [2024-01-31 17:04:00,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:00,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:04:00,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:00,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:04:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:04:00,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-31 17:04:00,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 139 transitions, 1264 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 17:04:00,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:00,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-31 17:04:00,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:01,637 INFO L124 PetriNetUnfolderBase]: 11897/16590 cut-off events. [2024-01-31 17:04:01,638 INFO L125 PetriNetUnfolderBase]: For 57815/58280 co-relation queries the response was YES. [2024-01-31 17:04:01,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63441 conditions, 16590 events. 11897/16590 cut-off events. For 57815/58280 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 92293 event pairs, 3063 based on Foata normal form. 483/16955 useless extension candidates. Maximal degree in co-relation 59173. Up to 10014 conditions per place. [2024-01-31 17:04:01,746 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 125 selfloop transitions, 3 changer transitions 9/169 dead transitions. [2024-01-31 17:04:01,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 169 transitions, 1722 flow [2024-01-31 17:04:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:04:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:04:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-01-31 17:04:01,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-01-31 17:04:01,749 INFO L175 Difference]: Start difference. First operand has 103 places, 139 transitions, 1264 flow. Second operand 3 states and 84 transitions. [2024-01-31 17:04:01,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 169 transitions, 1722 flow [2024-01-31 17:04:02,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 169 transitions, 1652 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-01-31 17:04:02,328 INFO L231 Difference]: Finished difference. Result has 106 places, 131 transitions, 1108 flow [2024-01-31 17:04:02,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1108, PETRI_PLACES=106, PETRI_TRANSITIONS=131} [2024-01-31 17:04:02,328 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 59 predicate places. [2024-01-31 17:04:02,329 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 131 transitions, 1108 flow [2024-01-31 17:04:02,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 17:04:02,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:02,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:02,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 17:04:02,329 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:04:02,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash 611069053, now seen corresponding path program 5 times [2024-01-31 17:04:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:02,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323609123] [2024-01-31 17:04:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:02,403 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 17:04:02,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:02,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323609123] [2024-01-31 17:04:02,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323609123] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:02,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180117334] [2024-01-31 17:04:02,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:04:02,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:02,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:02,405 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 17:04:02,428 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 17:04:02,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:02,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:02,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 17:04:02,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:02,557 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 17:04:02,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:02,596 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 17:04:02,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180117334] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:02,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:02,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-01-31 17:04:02,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261318916] [2024-01-31 17:04:02,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:02,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 17:04:02,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 17:04:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-01-31 17:04:02,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-31 17:04:02,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 131 transitions, 1108 flow. Second operand has 11 states, 11 states have (on average 12.0) internal successors, (132), 11 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 17:04:02,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:02,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-31 17:04:02,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:04,641 INFO L124 PetriNetUnfolderBase]: 18926/25234 cut-off events. [2024-01-31 17:04:04,642 INFO L125 PetriNetUnfolderBase]: For 59636/59636 co-relation queries the response was YES. [2024-01-31 17:04:04,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94004 conditions, 25234 events. 18926/25234 cut-off events. For 59636/59636 co-relation queries the response was YES. Maximal size of possible extension queue 963. Compared 132267 event pairs, 1631 based on Foata normal form. 268/25501 useless extension candidates. Maximal degree in co-relation 88628. Up to 4728 conditions per place. [2024-01-31 17:04:04,990 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 263 selfloop transitions, 85 changer transitions 0/351 dead transitions. [2024-01-31 17:04:04,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 351 transitions, 2712 flow [2024-01-31 17:04:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:04:04,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:04:04,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 368 transitions. [2024-01-31 17:04:04,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705426356589147 [2024-01-31 17:04:04,993 INFO L175 Difference]: Start difference. First operand has 106 places, 131 transitions, 1108 flow. Second operand 15 states and 368 transitions. [2024-01-31 17:04:04,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 351 transitions, 2712 flow [2024-01-31 17:04:05,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 351 transitions, 2647 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-01-31 17:04:05,636 INFO L231 Difference]: Finished difference. Result has 118 places, 153 transitions, 1548 flow [2024-01-31 17:04:05,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1548, PETRI_PLACES=118, PETRI_TRANSITIONS=153} [2024-01-31 17:04:05,637 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 71 predicate places. [2024-01-31 17:04:05,637 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 153 transitions, 1548 flow [2024-01-31 17:04:05,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.0) internal successors, (132), 11 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 17:04:05,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:05,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:05,655 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 17:04:05,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:05,852 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:04:05,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:05,853 INFO L85 PathProgramCache]: Analyzing trace with hash 530308319, now seen corresponding path program 3 times [2024-01-31 17:04:05,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:05,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247325332] [2024-01-31 17:04:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:05,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:05,935 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 17:04:05,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:05,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247325332] [2024-01-31 17:04:05,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247325332] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:05,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:05,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:05,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430947510] [2024-01-31 17:04:05,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:05,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:04:05,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:05,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:04:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:04:05,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-31 17:04:05,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 153 transitions, 1548 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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 17:04:05,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:05,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-31 17:04:05,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:07,924 INFO L124 PetriNetUnfolderBase]: 19294/25832 cut-off events. [2024-01-31 17:04:07,925 INFO L125 PetriNetUnfolderBase]: For 93742/93742 co-relation queries the response was YES. [2024-01-31 17:04:08,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102801 conditions, 25832 events. 19294/25832 cut-off events. For 93742/93742 co-relation queries the response was YES. Maximal size of possible extension queue 1005. Compared 137831 event pairs, 8011 based on Foata normal form. 120/25939 useless extension candidates. Maximal degree in co-relation 99718. Up to 18158 conditions per place. [2024-01-31 17:04:08,089 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 173 selfloop transitions, 42 changer transitions 0/218 dead transitions. [2024-01-31 17:04:08,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 218 transitions, 2239 flow [2024-01-31 17:04:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:04:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:04:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-01-31 17:04:08,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-01-31 17:04:08,091 INFO L175 Difference]: Start difference. First operand has 118 places, 153 transitions, 1548 flow. Second operand 6 states and 148 transitions. [2024-01-31 17:04:08,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 218 transitions, 2239 flow [2024-01-31 17:04:09,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 218 transitions, 2189 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-31 17:04:09,173 INFO L231 Difference]: Finished difference. Result has 122 places, 157 transitions, 1643 flow [2024-01-31 17:04:09,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1643, PETRI_PLACES=122, PETRI_TRANSITIONS=157} [2024-01-31 17:04:09,173 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 75 predicate places. [2024-01-31 17:04:09,173 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 157 transitions, 1643 flow [2024-01-31 17:04:09,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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 17:04:09,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:09,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:09,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 17:04:09,174 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:04:09,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:09,174 INFO L85 PathProgramCache]: Analyzing trace with hash 367430581, now seen corresponding path program 4 times [2024-01-31 17:04:09,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:09,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738841844] [2024-01-31 17:04:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:09,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:09,252 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 17:04:09,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:09,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738841844] [2024-01-31 17:04:09,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738841844] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:09,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:09,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:04:09,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926339355] [2024-01-31 17:04:09,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:09,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:04:09,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:09,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:04:09,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:04:09,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-31 17:04:09,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 157 transitions, 1643 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:04:09,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:09,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-31 17:04:09,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:11,528 INFO L124 PetriNetUnfolderBase]: 18119/24563 cut-off events. [2024-01-31 17:04:11,528 INFO L125 PetriNetUnfolderBase]: For 97255/97275 co-relation queries the response was YES. [2024-01-31 17:04:11,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99456 conditions, 24563 events. 18119/24563 cut-off events. For 97255/97275 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 135101 event pairs, 7456 based on Foata normal form. 68/24570 useless extension candidates. Maximal degree in co-relation 93543. Up to 17055 conditions per place. [2024-01-31 17:04:11,683 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 137 selfloop transitions, 30 changer transitions 13/204 dead transitions. [2024-01-31 17:04:11,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 204 transitions, 2177 flow [2024-01-31 17:04:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:04:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:04:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-01-31 17:04:11,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906976744186047 [2024-01-31 17:04:11,685 INFO L175 Difference]: Start difference. First operand has 122 places, 157 transitions, 1643 flow. Second operand 5 states and 127 transitions. [2024-01-31 17:04:11,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 204 transitions, 2177 flow [2024-01-31 17:04:12,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 204 transitions, 2122 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-31 17:04:12,736 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1643 flow [2024-01-31 17:04:12,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1643, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2024-01-31 17:04:12,737 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 77 predicate places. [2024-01-31 17:04:12,737 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1643 flow [2024-01-31 17:04:12,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:04:12,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:12,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:12,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 17:04:12,738 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:04:12,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1792852717, now seen corresponding path program 5 times [2024-01-31 17:04:12,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:12,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251710642] [2024-01-31 17:04:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:12,841 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 17:04:12,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:12,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251710642] [2024-01-31 17:04:12,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251710642] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:12,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:12,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:12,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081059398] [2024-01-31 17:04:12,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:12,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:04:12,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:04:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:04:12,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-31 17:04:12,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1643 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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 17:04:12,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:12,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-31 17:04:12,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:14,986 INFO L124 PetriNetUnfolderBase]: 20753/27745 cut-off events. [2024-01-31 17:04:14,986 INFO L125 PetriNetUnfolderBase]: For 107158/107158 co-relation queries the response was YES. [2024-01-31 17:04:15,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110460 conditions, 27745 events. 20753/27745 cut-off events. For 107158/107158 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 147971 event pairs, 5659 based on Foata normal form. 230/27973 useless extension candidates. Maximal degree in co-relation 106810. Up to 11718 conditions per place. [2024-01-31 17:04:15,179 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 174 selfloop transitions, 46 changer transitions 1/224 dead transitions. [2024-01-31 17:04:15,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 224 transitions, 2385 flow [2024-01-31 17:04:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:04:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:04:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-01-31 17:04:15,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-01-31 17:04:15,190 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1643 flow. Second operand 6 states and 153 transitions. [2024-01-31 17:04:15,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 224 transitions, 2385 flow [2024-01-31 17:04:16,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 224 transitions, 2305 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-01-31 17:04:16,593 INFO L231 Difference]: Finished difference. Result has 124 places, 158 transitions, 1706 flow [2024-01-31 17:04:16,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1706, PETRI_PLACES=124, PETRI_TRANSITIONS=158} [2024-01-31 17:04:16,594 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 77 predicate places. [2024-01-31 17:04:16,594 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 158 transitions, 1706 flow [2024-01-31 17:04:16,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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 17:04:16,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:16,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:16,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 17:04:16,596 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:04:16,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:16,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1391058349, now seen corresponding path program 6 times [2024-01-31 17:04:16,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:16,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416130913] [2024-01-31 17:04:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:16,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:16,666 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 17:04:16,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:16,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416130913] [2024-01-31 17:04:16,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416130913] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:16,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:16,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:04:16,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328614347] [2024-01-31 17:04:16,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:16,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:04:16,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:16,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:04:16,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:04:16,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-31 17:04:16,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 158 transitions, 1706 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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 17:04:16,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:16,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-31 17:04:16,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:18,724 INFO L124 PetriNetUnfolderBase]: 20192/26976 cut-off events. [2024-01-31 17:04:18,724 INFO L125 PetriNetUnfolderBase]: For 107335/107335 co-relation queries the response was YES. [2024-01-31 17:04:18,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107742 conditions, 26976 events. 20192/26976 cut-off events. For 107335/107335 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 143844 event pairs, 5910 based on Foata normal form. 158/27132 useless extension candidates. Maximal degree in co-relation 104726. Up to 13657 conditions per place. [2024-01-31 17:04:18,866 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 163 selfloop transitions, 50 changer transitions 1/217 dead transitions. [2024-01-31 17:04:18,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 217 transitions, 2336 flow [2024-01-31 17:04:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:04:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:04:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-01-31 17:04:18,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-01-31 17:04:18,868 INFO L175 Difference]: Start difference. First operand has 124 places, 158 transitions, 1706 flow. Second operand 6 states and 148 transitions. [2024-01-31 17:04:18,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 217 transitions, 2336 flow [2024-01-31 17:04:19,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 217 transitions, 2211 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-01-31 17:04:19,973 INFO L231 Difference]: Finished difference. Result has 122 places, 156 transitions, 1644 flow [2024-01-31 17:04:19,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1644, PETRI_PLACES=122, PETRI_TRANSITIONS=156} [2024-01-31 17:04:19,974 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 75 predicate places. [2024-01-31 17:04:19,974 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 156 transitions, 1644 flow [2024-01-31 17:04:19,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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 17:04:19,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:19,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:19,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 17:04:19,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:04:19,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1634101919, now seen corresponding path program 6 times [2024-01-31 17:04:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:19,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071737790] [2024-01-31 17:04:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:20,042 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 17:04:20,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:20,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071737790] [2024-01-31 17:04:20,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071737790] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:04:20,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:04:20,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:04:20,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840117419] [2024-01-31 17:04:20,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:20,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:04:20,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:20,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:04:20,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:04:20,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-01-31 17:04:20,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 156 transitions, 1644 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:04:20,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:20,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-01-31 17:04:20,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:22,119 INFO L124 PetriNetUnfolderBase]: 17499/23579 cut-off events. [2024-01-31 17:04:22,120 INFO L125 PetriNetUnfolderBase]: For 95105/95447 co-relation queries the response was YES. [2024-01-31 17:04:22,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93550 conditions, 23579 events. 17499/23579 cut-off events. For 95105/95447 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 127435 event pairs, 5260 based on Foata normal form. 56/23541 useless extension candidates. Maximal degree in co-relation 88009. Up to 11696 conditions per place. [2024-01-31 17:04:22,269 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 131 selfloop transitions, 34 changer transitions 12/202 dead transitions. [2024-01-31 17:04:22,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 202 transitions, 2155 flow [2024-01-31 17:04:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:04:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:04:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-01-31 17:04:22,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-01-31 17:04:22,273 INFO L175 Difference]: Start difference. First operand has 122 places, 156 transitions, 1644 flow. Second operand 5 states and 125 transitions. [2024-01-31 17:04:22,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 202 transitions, 2155 flow [2024-01-31 17:04:23,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 202 transitions, 1971 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-01-31 17:04:23,671 INFO L231 Difference]: Finished difference. Result has 115 places, 155 transitions, 1513 flow [2024-01-31 17:04:23,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1461, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1513, PETRI_PLACES=115, PETRI_TRANSITIONS=155} [2024-01-31 17:04:23,673 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 68 predicate places. [2024-01-31 17:04:23,673 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 155 transitions, 1513 flow [2024-01-31 17:04:23,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 17:04:23,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:23,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:23,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-31 17:04:23,674 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:04:23,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:23,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1072002265, now seen corresponding path program 1 times [2024-01-31 17:04:23,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:23,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173692015] [2024-01-31 17:04:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:23,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:23,774 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 17:04:23,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:23,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173692015] [2024-01-31 17:04:23,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173692015] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:23,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680375330] [2024-01-31 17:04:23,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:23,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:23,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:23,776 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 17:04:23,777 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 17:04:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:23,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:04:23,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:23,991 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 17:04:23,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:04:24,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680375330] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:24,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:24,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-01-31 17:04:24,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706498057] [2024-01-31 17:04:24,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:24,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:04:24,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:04:24,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:04:24,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-31 17:04:24,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 155 transitions, 1513 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:04:24,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:24,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-31 17:04:24,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:28,716 INFO L124 PetriNetUnfolderBase]: 40901/57415 cut-off events. [2024-01-31 17:04:28,716 INFO L125 PetriNetUnfolderBase]: For 220180/221184 co-relation queries the response was YES. [2024-01-31 17:04:28,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212170 conditions, 57415 events. 40901/57415 cut-off events. For 220180/221184 co-relation queries the response was YES. Maximal size of possible extension queue 1869. Compared 367103 event pairs, 4081 based on Foata normal form. 1801/59086 useless extension candidates. Maximal degree in co-relation 192376. Up to 20484 conditions per place. [2024-01-31 17:04:29,117 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 406 selfloop transitions, 22 changer transitions 5/481 dead transitions. [2024-01-31 17:04:29,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 481 transitions, 5164 flow [2024-01-31 17:04:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:04:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:04:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2024-01-31 17:04:29,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.770764119601329 [2024-01-31 17:04:29,119 INFO L175 Difference]: Start difference. First operand has 115 places, 155 transitions, 1513 flow. Second operand 7 states and 232 transitions. [2024-01-31 17:04:29,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 481 transitions, 5164 flow [2024-01-31 17:04:33,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 481 transitions, 4890 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-31 17:04:33,475 INFO L231 Difference]: Finished difference. Result has 118 places, 174 transitions, 1636 flow [2024-01-31 17:04:33,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1636, PETRI_PLACES=118, PETRI_TRANSITIONS=174} [2024-01-31 17:04:33,476 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 71 predicate places. [2024-01-31 17:04:33,476 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 174 transitions, 1636 flow [2024-01-31 17:04:33,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 17:04:33,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:33,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:33,488 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 17:04:33,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 17:04:33,677 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:04:33,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:33,678 INFO L85 PathProgramCache]: Analyzing trace with hash 106333929, now seen corresponding path program 2 times [2024-01-31 17:04:33,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:33,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301905324] [2024-01-31 17:04:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:33,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:33,799 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 17:04:33,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:33,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301905324] [2024-01-31 17:04:33,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301905324] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:33,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484188152] [2024-01-31 17:04:33,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:04:33,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:33,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:33,801 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 17:04:33,820 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 17:04:33,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:04:33,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:33,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:04:33,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:34,005 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 17:04:34,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:04:34,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484188152] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:34,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:04:34,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2024-01-31 17:04:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406567765] [2024-01-31 17:04:34,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:04:34,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:04:34,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:34,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:04:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:04:34,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-31 17:04:34,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 174 transitions, 1636 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:34,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:34,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-31 17:04:34,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand