./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i --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/40_barrier_vf-pthread.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/pthread-ext/40_barrier_vf-pthread.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/40_barrier_vf-pthread.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 17:32:30,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:32:30,108 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:32:30,111 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:32:30,111 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:32:30,136 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:32:30,136 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:32:30,137 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:32:30,137 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:32:30,137 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:32:30,138 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:32:30,138 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:32:30,138 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:32:30,139 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:32:30,139 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:32:30,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:32:30,140 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:32:30,140 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:32:30,140 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:32:30,140 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:32:30,141 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:32:30,141 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:32:30,142 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:32:30,142 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:32:30,142 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:32:30,142 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:32:30,143 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:32:30,143 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:32:30,143 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:32:30,144 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:32:30,144 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:32:30,144 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:32:30,144 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:32:30,145 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:32:30,145 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:32:30,145 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:32:30,146 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:32:30,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:32:30,146 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:32:30,147 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:32:30,147 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:32:30,147 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:32:30,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:32:30,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:32:30,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:32:30,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:32:30,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:32:30,369 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:32:30,370 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:32:30,371 INFO L431 ainManager$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/40_barrier_vf-pthread.yml/witness.yml [2024-01-31 17:32:30,439 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:32:30,439 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:32:30,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2024-01-31 17:32:31,390 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:32:31,569 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:32:31,569 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2024-01-31 17:32:31,579 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1916d530/e913f84ec5ba4a2db8a4308970a942ec/FLAG39d751e80 [2024-01-31 17:32:31,590 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1916d530/e913f84ec5ba4a2db8a4308970a942ec [2024-01-31 17:32:31,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:32:31,591 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:32:31,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:32:31,592 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:32:31,595 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:32:31,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:32:30" (1/2) ... [2024-01-31 17:32:31,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d403d29 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:32:31, skipping insertion in model container [2024-01-31 17:32:31,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:32:30" (1/2) ... [2024-01-31 17:32:31,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48537017 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:32:31, skipping insertion in model container [2024-01-31 17:32:31,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:32:31" (2/2) ... [2024-01-31 17:32:31,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d403d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:31, skipping insertion in model container [2024-01-31 17:32:31,598 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:32:31" (2/2) ... [2024-01-31 17:32:31,598 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:32:31,623 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:32:31,624 INFO L98 nessWitnessExtractor]: Location invariant before [L704-L704] (unsigned long )arg == 0UL [2024-01-31 17:32:31,648 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:32:31,875 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i[30842,30855] [2024-01-31 17:32:31,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:32:31,899 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:32:31,941 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i[30842,30855] Start Parsing Local [2024-01-31 17:32:31,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:32:32,014 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:32:32,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32 WrapperNode [2024-01-31 17:32:32,015 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:32:32,016 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:32:32,016 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:32:32,016 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:32:32,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,041 INFO L138 Inliner]: procedures = 165, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2024-01-31 17:32:32,041 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:32:32,042 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:32:32,042 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:32:32,042 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:32:32,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,052 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,060 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 10, 1]. 56 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 10, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-01-31 17:32:32,060 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,061 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,075 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:32:32,081 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:32:32,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:32:32,082 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:32:32,082 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (1/1) ... [2024-01-31 17:32:32,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:32:32,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:32:32,110 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 17:32:32,114 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 17:32:32,133 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 17:32:32,134 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 17:32:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:32:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:32:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:32:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:32:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 17:32:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:32:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:32:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:32:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:32:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:32:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:32:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:32:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 17:32:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:32:32,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:32:32,137 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 17:32:32,257 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:32:32,259 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:32:32,378 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:32:32,378 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:32:32,479 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:32:32,480 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:32:32,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:32:32 BoogieIcfgContainer [2024-01-31 17:32:32,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:32:32,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:32:32,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:32:32,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:32:32,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:32:30" (1/4) ... [2024-01-31 17:32:32,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1fe06b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:32:32, skipping insertion in model container [2024-01-31 17:32:32,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:32:31" (2/4) ... [2024-01-31 17:32:32,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1fe06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:32:32, skipping insertion in model container [2024-01-31 17:32:32,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:32:32" (3/4) ... [2024-01-31 17:32:32,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1fe06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:32:32, skipping insertion in model container [2024-01-31 17:32:32,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:32:32" (4/4) ... [2024-01-31 17:32:32,485 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf-pthread.i [2024-01-31 17:32:32,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:32:32,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 17:32:32,531 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:32:32,552 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 17:32:32,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 23 transitions, 50 flow [2024-01-31 17:32:32,595 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2024-01-31 17:32:32,595 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:32:32,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 25 events. 3/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-01-31 17:32:32,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 23 transitions, 50 flow [2024-01-31 17:32:32,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 23 transitions, 50 flow [2024-01-31 17:32:32,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:32:32,609 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;@2179da12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:32:32,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-31 17:32:32,614 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:32:32,614 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-01-31 17:32:32,614 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:32:32,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:32,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-31 17:32:32,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 17:32:32,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2062371610, now seen corresponding path program 1 times [2024-01-31 17:32:32,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:32,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121186408] [2024-01-31 17:32:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:32,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 17:32:32,749 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 17:32:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 17:32:32,792 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 17:32:32,794 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 17:32:32,794 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-31 17:32:32,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-01-31 17:32:32,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-31 17:32:32,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 5 remaining) [2024-01-31 17:32:32,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-31 17:32:32,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:32:32,797 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-31 17:32:32,802 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 17:32:32,802 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 17:32:32,828 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 17:32:32,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 41 transitions, 92 flow [2024-01-31 17:32:32,848 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2024-01-31 17:32:32,848 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:32:32,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 96 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2024-01-31 17:32:32,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 41 transitions, 92 flow [2024-01-31 17:32:32,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 41 transitions, 92 flow [2024-01-31 17:32:32,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:32:32,851 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;@2179da12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:32:32,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-31 17:32:32,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:32:32,856 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-01-31 17:32:32,856 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:32:32,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:32,856 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-31 17:32:32,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 17:32:32,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash -895673496, now seen corresponding path program 1 times [2024-01-31 17:32:32,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:32,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659987578] [2024-01-31 17:32:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:32,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 17:32:32,872 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 17:32:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 17:32:32,885 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 17:32:32,885 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 17:32:32,885 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-01-31 17:32:32,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 7 remaining) [2024-01-31 17:32:32,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-01-31 17:32:32,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 7 remaining) [2024-01-31 17:32:32,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-01-31 17:32:32,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 7 remaining) [2024-01-31 17:32:32,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-01-31 17:32:32,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:32:32,886 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-31 17:32:32,886 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 17:32:32,886 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 17:32:32,903 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 17:32:32,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 59 transitions, 136 flow [2024-01-31 17:32:32,922 INFO L124 PetriNetUnfolderBase]: 9/67 cut-off events. [2024-01-31 17:32:32,922 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 17:32:32,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 9/67 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 184 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2024-01-31 17:32:32,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 59 transitions, 136 flow [2024-01-31 17:32:32,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 59 transitions, 136 flow [2024-01-31 17:32:32,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:32:32,928 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;@2179da12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:32:32,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-01-31 17:32:32,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:32:32,940 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-01-31 17:32:32,940 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 17:32:32,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:32,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:32:32,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:32:32,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:32,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1002886815, now seen corresponding path program 1 times [2024-01-31 17:32:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:32,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618361168] [2024-01-31 17:32:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:32,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:33,102 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 17:32:33,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:32:33,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618361168] [2024-01-31 17:32:33,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618361168] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:32:33,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:32:33,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:32:33,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754277451] [2024-01-31 17:32:33,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:32:33,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:32:33,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:32:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:32:33,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 59 [2024-01-31 17:32:33,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 59 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:32:33,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:33,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 59 [2024-01-31 17:32:33,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:32:34,499 INFO L124 PetriNetUnfolderBase]: 11865/20026 cut-off events. [2024-01-31 17:32:34,499 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2024-01-31 17:32:34,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36347 conditions, 20026 events. 11865/20026 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 158839 event pairs, 3130 based on Foata normal form. 4215/23178 useless extension candidates. Maximal degree in co-relation 22373. Up to 6104 conditions per place. [2024-01-31 17:32:34,614 INFO L140 encePairwiseOnDemand]: 45/59 looper letters, 78 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-01-31 17:32:34,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 104 transitions, 421 flow [2024-01-31 17:32:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:32:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:32:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2024-01-31 17:32:34,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7584745762711864 [2024-01-31 17:32:34,624 INFO L175 Difference]: Start difference. First operand has 57 places, 59 transitions, 136 flow. Second operand 4 states and 179 transitions. [2024-01-31 17:32:34,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 104 transitions, 421 flow [2024-01-31 17:32:34,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 104 transitions, 415 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-01-31 17:32:34,629 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 152 flow [2024-01-31 17:32:34,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2024-01-31 17:32:34,633 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2024-01-31 17:32:34,633 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 152 flow [2024-01-31 17:32:34,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:32:34,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:34,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:32:34,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:32:34,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:32:34,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1025675204, now seen corresponding path program 1 times [2024-01-31 17:32:34,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:34,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44161141] [2024-01-31 17:32:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:34,714 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 17:32:34,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:32:34,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44161141] [2024-01-31 17:32:34,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44161141] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:32:34,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:32:34,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:32:34,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555493758] [2024-01-31 17:32:34,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:32:34,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:32:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:32:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:32:34,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 59 [2024-01-31 17:32:34,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 17:32:34,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:34,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 59 [2024-01-31 17:32:34,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:32:35,416 INFO L124 PetriNetUnfolderBase]: 6742/11640 cut-off events. [2024-01-31 17:32:35,416 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2024-01-31 17:32:35,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21771 conditions, 11640 events. 6742/11640 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 88221 event pairs, 2218 based on Foata normal form. 474/11520 useless extension candidates. Maximal degree in co-relation 18533. Up to 6994 conditions per place. [2024-01-31 17:32:35,523 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 53 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2024-01-31 17:32:35,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 313 flow [2024-01-31 17:32:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:32:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:32:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-01-31 17:32:35,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576271186440678 [2024-01-31 17:32:35,529 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 152 flow. Second operand 3 states and 102 transitions. [2024-01-31 17:32:35,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 313 flow [2024-01-31 17:32:35,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 313 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:32:35,533 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 170 flow [2024-01-31 17:32:35,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-01-31 17:32:35,534 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-01-31 17:32:35,534 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 170 flow [2024-01-31 17:32:35,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 17:32:35,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:35,535 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-31 17:32:35,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:32:35,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:32:35,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash 910569337, now seen corresponding path program 1 times [2024-01-31 17:32:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:35,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64641130] [2024-01-31 17:32:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 17:32:35,551 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 17:32:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 17:32:35,559 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 17:32:35,559 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 17:32:35,559 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-01-31 17:32:35,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 9 remaining) [2024-01-31 17:32:35,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2024-01-31 17:32:35,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 9 remaining) [2024-01-31 17:32:35,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2024-01-31 17:32:35,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 9 remaining) [2024-01-31 17:32:35,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2024-01-31 17:32:35,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 9 remaining) [2024-01-31 17:32:35,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2024-01-31 17:32:35,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:32:35,561 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-31 17:32:35,562 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 17:32:35,562 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-31 17:32:35,581 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 17:32:35,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 77 transitions, 182 flow [2024-01-31 17:32:35,589 INFO L124 PetriNetUnfolderBase]: 12/88 cut-off events. [2024-01-31 17:32:35,589 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-31 17:32:35,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 88 events. 12/88 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 254 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2024-01-31 17:32:35,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 77 transitions, 182 flow [2024-01-31 17:32:35,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 77 transitions, 182 flow [2024-01-31 17:32:35,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:32:35,592 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;@2179da12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:32:35,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-01-31 17:32:35,594 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:32:35,594 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-01-31 17:32:35,595 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 17:32:35,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:35,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:32:35,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 17:32:35,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:35,595 INFO L85 PathProgramCache]: Analyzing trace with hash 232661505, now seen corresponding path program 1 times [2024-01-31 17:32:35,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:35,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011262137] [2024-01-31 17:32:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:35,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:35,637 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 17:32:35,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:32:35,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011262137] [2024-01-31 17:32:35,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011262137] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:32:35,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:32:35,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:32:35,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245172220] [2024-01-31 17:32:35,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:32:35,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:32:35,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:32:35,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:32:35,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 77 [2024-01-31 17:32:35,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:32:35,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:35,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 77 [2024-01-31 17:32:35,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:32:51,055 INFO L124 PetriNetUnfolderBase]: 184809/277386 cut-off events. [2024-01-31 17:32:51,055 INFO L125 PetriNetUnfolderBase]: For 13779/13779 co-relation queries the response was YES. [2024-01-31 17:32:51,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514267 conditions, 277386 events. 184809/277386 cut-off events. For 13779/13779 co-relation queries the response was YES. Maximal size of possible extension queue 12202. Compared 2521142 event pairs, 49795 based on Foata normal form. 60687/325551 useless extension candidates. Maximal degree in co-relation 179243. Up to 83388 conditions per place. [2024-01-31 17:32:52,883 INFO L140 encePairwiseOnDemand]: 59/77 looper letters, 103 selfloop transitions, 13 changer transitions 0/137 dead transitions. [2024-01-31 17:32:52,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 137 transitions, 571 flow [2024-01-31 17:32:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:32:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:32:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 235 transitions. [2024-01-31 17:32:52,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.762987012987013 [2024-01-31 17:32:52,887 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 182 flow. Second operand 4 states and 235 transitions. [2024-01-31 17:32:52,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 137 transitions, 571 flow [2024-01-31 17:32:52,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 137 transitions, 553 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-01-31 17:32:52,898 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 200 flow [2024-01-31 17:32:52,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2024-01-31 17:32:52,901 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -6 predicate places. [2024-01-31 17:32:52,901 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 200 flow [2024-01-31 17:32:52,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:32:52,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:52,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:32:52,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:32:52,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 17:32:52,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:52,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1378382854, now seen corresponding path program 1 times [2024-01-31 17:32:52,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:52,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889767418] [2024-01-31 17:32:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:52,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:52,963 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 17:32:52,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:32:52,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889767418] [2024-01-31 17:32:52,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889767418] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:32:52,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:32:52,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:32:52,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931784994] [2024-01-31 17:32:52,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:32:52,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:32:52,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:32:52,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:32:52,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 77 [2024-01-31 17:32:52,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:32:52,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:52,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 77 [2024-01-31 17:32:52,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:33:02,991 INFO L124 PetriNetUnfolderBase]: 124939/191400 cut-off events. [2024-01-31 17:33:02,992 INFO L125 PetriNetUnfolderBase]: For 11908/11908 co-relation queries the response was YES. [2024-01-31 17:33:03,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364087 conditions, 191400 events. 124939/191400 cut-off events. For 11908/11908 co-relation queries the response was YES. Maximal size of possible extension queue 8231. Compared 1733871 event pairs, 36811 based on Foata normal form. 4062/186261 useless extension candidates. Maximal degree in co-relation 309789. Up to 140026 conditions per place. [2024-01-31 17:33:04,059 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 78 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2024-01-31 17:33:04,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 464 flow [2024-01-31 17:33:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:33:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:33:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-01-31 17:33:04,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974025974025974 [2024-01-31 17:33:04,061 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 200 flow. Second operand 3 states and 138 transitions. [2024-01-31 17:33:04,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 464 flow [2024-01-31 17:33:04,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 464 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:33:04,066 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 247 flow [2024-01-31 17:33:04,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2024-01-31 17:33:04,067 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2024-01-31 17:33:04,067 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 247 flow [2024-01-31 17:33:04,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:33:04,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:33:04,067 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-01-31 17:33:04,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 17:33:04,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 17:33:04,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:33:04,068 INFO L85 PathProgramCache]: Analyzing trace with hash 339561041, now seen corresponding path program 1 times [2024-01-31 17:33:04,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:33:04,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817724646] [2024-01-31 17:33:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:33:04,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:33:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 17:33:04,078 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 17:33:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 17:33:04,085 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 17:33:04,085 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 17:33:04,085 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2024-01-31 17:33:04,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 11 remaining) [2024-01-31 17:33:04,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2024-01-31 17:33:04,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 11 remaining) [2024-01-31 17:33:04,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 11 remaining) [2024-01-31 17:33:04,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 11 remaining) [2024-01-31 17:33:04,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 11 remaining) [2024-01-31 17:33:04,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 11 remaining) [2024-01-31 17:33:04,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 11 remaining) [2024-01-31 17:33:04,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 11 remaining) [2024-01-31 17:33:04,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 11 remaining) [2024-01-31 17:33:04,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 17:33:04,087 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-31 17:33:04,087 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 17:33:04,088 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-01-31 17:33:04,108 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 17:33:04,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 95 transitions, 230 flow [2024-01-31 17:33:04,117 INFO L124 PetriNetUnfolderBase]: 15/109 cut-off events. [2024-01-31 17:33:04,117 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-31 17:33:04,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 109 events. 15/109 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 326 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 106. Up to 6 conditions per place. [2024-01-31 17:33:04,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 95 transitions, 230 flow [2024-01-31 17:33:04,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 95 transitions, 230 flow [2024-01-31 17:33:04,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:33:04,122 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;@2179da12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:33:04,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-01-31 17:33:04,124 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:33:04,124 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2024-01-31 17:33:04,125 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-31 17:33:04,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:33:04,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:33:04,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:33:04,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:33:04,125 INFO L85 PathProgramCache]: Analyzing trace with hash -726152577, now seen corresponding path program 1 times [2024-01-31 17:33:04,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:33:04,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476540260] [2024-01-31 17:33:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:33:04,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:33:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:33:04,202 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 17:33:04,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:33:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476540260] [2024-01-31 17:33:04,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476540260] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:33:04,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:33:04,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:33:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300936058] [2024-01-31 17:33:04,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:33:04,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:33:04,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:33:04,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:33:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:33:04,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 95 [2024-01-31 17:33:04,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 17:33:04,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:33:04,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 95 [2024-01-31 17:33:04,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand