./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur-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/37_stack_lock_p0_vs_concur-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/37_stack_lock_p0_vs_concur-pthread.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/37_stack_lock_p0_vs_concur-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 16:43:09,982 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:43:10,047 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:43:10,052 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:43:10,052 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:43:10,076 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:43:10,077 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:43:10,077 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:43:10,078 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:43:10,081 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:43:10,081 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:43:10,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:43:10,082 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:43:10,083 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:43:10,083 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:43:10,084 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:43:10,084 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:43:10,084 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:43:10,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:43:10,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:43:10,085 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:43:10,085 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:43:10,085 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:43:10,085 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:43:10,086 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:43:10,086 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:43:10,086 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:43:10,086 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:43:10,087 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:43:10,087 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:43:10,088 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:43:10,088 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:43:10,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:43:10,088 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:43:10,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:43:10,089 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:43:10,089 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:43:10,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:43:10,089 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:43:10,089 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:43:10,089 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:43:10,090 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:43:10,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:43:10,090 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:43:10,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:43:10,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:43:10,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:43:10,336 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:43:10,337 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:43:10,338 INFO L431 ainManager$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/37_stack_lock_p0_vs_concur-pthread.yml/witness.yml [2024-01-31 16:43:10,499 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:43:10,500 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:43:10,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2024-01-31 16:43:11,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:43:11,654 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:43:11,654 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2024-01-31 16:43:11,669 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3a622d09/50fc621349164cd79a14147fd1a44dd4/FLAGa0d230cf0 [2024-01-31 16:43:11,684 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3a622d09/50fc621349164cd79a14147fd1a44dd4 [2024-01-31 16:43:11,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:43:11,685 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:43:11,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:43:11,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:43:11,691 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:43:11,692 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:43:10" (1/2) ... [2024-01-31 16:43:11,692 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1813534 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:11, skipping insertion in model container [2024-01-31 16:43:11,693 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:43:10" (1/2) ... [2024-01-31 16:43:11,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e667c4b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:43:11, skipping insertion in model container [2024-01-31 16:43:11,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:43:11" (2/2) ... [2024-01-31 16:43:11,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1813534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:11, skipping insertion in model container [2024-01-31 16:43:11,695 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:43:11" (2/2) ... [2024-01-31 16:43:11,695 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:43:11,882 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:43:11,883 INFO L98 nessWitnessExtractor]: Location invariant after [L713-L713] (((1 <= top) && (top <= 64)) && ((unsigned long )arg == 0UL)) && (top != 0) [2024-01-31 16:43:11,883 INFO L98 nessWitnessExtractor]: Location invariant before [L713-L713] (unsigned long )arg == 0UL [2024-01-31 16:43:11,884 INFO L98 nessWitnessExtractor]: Location invariant after [L699-L699] ((((((((((((((2147483638LL + (long long )d) + (long long )oldTop >= 0LL) && ((2147483638LL + (long long )d) + (long long )newTop >= 0LL)) && ((4294967296LL + (long long )newTop) + (long long )oldTop >= 0LL)) && ((2147483658LL - (long long )d) + (long long )oldTop >= 0LL)) && ((2147483658LL - (long long )d) + (long long )newTop >= 0LL)) && ((4294967295LL - (long long )newTop) + (long long )oldTop >= 0LL)) && ((2147483637LL + (long long )d) - (long long )oldTop >= 0LL)) && ((2147483637LL + (long long )d) - (long long )newTop >= 0LL)) && ((4294967295LL + (long long )newTop) - (long long )oldTop >= 0LL)) && ((2147483657LL - (long long )d) - (long long )oldTop >= 0LL)) && ((2147483657LL - (long long )d) - (long long )newTop >= 0LL)) && ((4294967294LL - (long long )newTop) - (long long )oldTop >= 0LL)) && (10 == d)) && (d == 10) [2024-01-31 16:43:11,884 INFO L98 nessWitnessExtractor]: Location invariant before [L713-L713] (top == 0) && ((unsigned long )arg == 0UL) [2024-01-31 16:43:11,920 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:43:12,173 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/37_stack_lock_p0_vs_concur-pthread.i[31052,31065] [2024-01-31 16:43:12,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:43:12,189 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:43:12,229 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:43:12,231 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/37_stack_lock_p0_vs_concur-pthread.i[31052,31065] Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:43:12,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:43:12,304 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:43:12,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12 WrapperNode [2024-01-31 16:43:12,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:43:12,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:43:12,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:43:12,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:43:12,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,320 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,335 INFO L138 Inliner]: procedures = 165, calls = 32, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 89 [2024-01-31 16:43:12,335 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:43:12,336 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:43:12,336 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:43:12,336 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:43:12,344 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,344 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,347 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,357 INFO L175 MemorySlicer]: Split 15 memory accesses to 4 slices as follows [2, 7, 1, 5]. 47 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 1, 0, 5]. The 3 writes are split as follows [0, 2, 1, 0]. [2024-01-31 16:43:12,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,362 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:43:12,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:43:12,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:43:12,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:43:12,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (1/1) ... [2024-01-31 16:43:12,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:43:12,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:43:12,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:43:12,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:43:12,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:43:12,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:43:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:43:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:43:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 16:43:12,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 16:43:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:43:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:43:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:43:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:43:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:43:12,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:43:12,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:43:12,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:43:12,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:43:12,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:43:12,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:43:12,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:43:12,437 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:43:12,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:43:12,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:43:12,439 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:43:12,551 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:43:12,552 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:43:12,686 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:43:12,686 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:43:12,784 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:43:12,787 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:43:12,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:43:12 BoogieIcfgContainer [2024-01-31 16:43:12,788 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:43:12,790 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:43:12,790 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:43:12,792 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:43:12,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:43:10" (1/4) ... [2024-01-31 16:43:12,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372fec88 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:43:12, skipping insertion in model container [2024-01-31 16:43:12,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:43:11" (2/4) ... [2024-01-31 16:43:12,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372fec88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:43:12, skipping insertion in model container [2024-01-31 16:43:12,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:43:12" (3/4) ... [2024-01-31 16:43:12,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372fec88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:43:12, skipping insertion in model container [2024-01-31 16:43:12,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:43:12" (4/4) ... [2024-01-31 16:43:12,794 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur-pthread.i [2024-01-31 16:43:12,807 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:43:12,807 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-01-31 16:43:12,807 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:43:12,865 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:43:12,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 32 transitions, 68 flow [2024-01-31 16:43:12,915 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2024-01-31 16:43:12,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:43:12,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 34 events. 3/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-01-31 16:43:12,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 32 transitions, 68 flow [2024-01-31 16:43:12,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 32 transitions, 68 flow [2024-01-31 16:43:12,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:43:12,932 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;@29f7dab4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:43:12,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-01-31 16:43:12,935 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:43:12,935 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-01-31 16:43:12,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:43:12,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:12,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:43:12,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-01-31 16:43:12,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:12,940 INFO L85 PathProgramCache]: Analyzing trace with hash -265866413, now seen corresponding path program 1 times [2024-01-31 16:43:12,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:12,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069287960] [2024-01-31 16:43:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:12,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:43:13,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:13,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069287960] [2024-01-31 16:43:13,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069287960] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:13,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:13,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:43:13,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30242214] [2024-01-31 16:43:13,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:13,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:43:13,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:13,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:43:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:43:13,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 32 [2024-01-31 16:43:13,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 16:43:13,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:13,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 32 [2024-01-31 16:43:13,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:13,445 INFO L124 PetriNetUnfolderBase]: 23/92 cut-off events. [2024-01-31 16:43:13,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:43:13,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 92 events. 23/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 218 event pairs, 0 based on Foata normal form. 6/89 useless extension candidates. Maximal degree in co-relation 140. Up to 50 conditions per place. [2024-01-31 16:43:13,450 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 15 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-01-31 16:43:13,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 98 flow [2024-01-31 16:43:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:43:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:43:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-01-31 16:43:13,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-01-31 16:43:13,462 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 68 flow. Second operand 4 states and 76 transitions. [2024-01-31 16:43:13,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 98 flow [2024-01-31 16:43:13,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 98 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:43:13,466 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 62 flow [2024-01-31 16:43:13,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-01-31 16:43:13,471 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-01-31 16:43:13,472 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 62 flow [2024-01-31 16:43:13,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 16:43:13,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:13,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-31 16:43:13,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:43:13,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-01-31 16:43:13,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash -265877767, now seen corresponding path program 1 times [2024-01-31 16:43:13,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:13,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183704963] [2024-01-31 16:43:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:13,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:13,488 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:43:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:13,507 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:43:13,508 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:43:13,509 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-01-31 16:43:13,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 9 remaining) [2024-01-31 16:43:13,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 9 remaining) [2024-01-31 16:43:13,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 9 remaining) [2024-01-31 16:43:13,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2024-01-31 16:43:13,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 9 remaining) [2024-01-31 16:43:13,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 9 remaining) [2024-01-31 16:43:13,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 9 remaining) [2024-01-31 16:43:13,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2024-01-31 16:43:13,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:43:13,512 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-31 16:43:13,514 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:43:13,514 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 16:43:13,541 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:43:13,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 128 flow [2024-01-31 16:43:13,559 INFO L124 PetriNetUnfolderBase]: 6/64 cut-off events. [2024-01-31 16:43:13,559 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:43:13,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 64 events. 6/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 155 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 55. Up to 3 conditions per place. [2024-01-31 16:43:13,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 128 flow [2024-01-31 16:43:13,564 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 59 transitions, 128 flow [2024-01-31 16:43:13,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:43:13,569 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;@29f7dab4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:43:13,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-01-31 16:43:13,573 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:43:13,573 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2024-01-31 16:43:13,574 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:43:13,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:13,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:43:13,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-01-31 16:43:13,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:13,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1480357875, now seen corresponding path program 1 times [2024-01-31 16:43:13,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:13,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950762522] [2024-01-31 16:43:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:13,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:43:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950762522] [2024-01-31 16:43:13,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950762522] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:13,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:13,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:43:13,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110983494] [2024-01-31 16:43:13,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:13,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:43:13,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:43:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:43:13,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-01-31 16:43:13,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 128 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 16:43:13,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:13,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-01-31 16:43:13,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:13,845 INFO L124 PetriNetUnfolderBase]: 574/1343 cut-off events. [2024-01-31 16:43:13,845 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-01-31 16:43:13,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 1343 events. 574/1343 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8226 event pairs, 18 based on Foata normal form. 150/1379 useless extension candidates. Maximal degree in co-relation 2078. Up to 850 conditions per place. [2024-01-31 16:43:13,856 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 35 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-01-31 16:43:13,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 217 flow [2024-01-31 16:43:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:43:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:43:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-01-31 16:43:13,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6694915254237288 [2024-01-31 16:43:13,860 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 128 flow. Second operand 4 states and 158 transitions. [2024-01-31 16:43:13,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 217 flow [2024-01-31 16:43:13,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 217 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:43:13,863 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 116 flow [2024-01-31 16:43:13,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-01-31 16:43:13,863 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2024-01-31 16:43:13,864 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 116 flow [2024-01-31 16:43:13,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 16:43:13,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:13,864 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-31 16:43:13,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:43:13,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-01-31 16:43:13,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash -488996606, now seen corresponding path program 1 times [2024-01-31 16:43:13,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:13,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232964475] [2024-01-31 16:43:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:13,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:13,891 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:43:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:13,916 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:43:13,917 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:43:13,917 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-01-31 16:43:13,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 13 remaining) [2024-01-31 16:43:13,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 13 remaining) [2024-01-31 16:43:13,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 13 remaining) [2024-01-31 16:43:13,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2024-01-31 16:43:13,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 13 remaining) [2024-01-31 16:43:13,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 13 remaining) [2024-01-31 16:43:13,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 13 remaining) [2024-01-31 16:43:13,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2024-01-31 16:43:13,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 13 remaining) [2024-01-31 16:43:13,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 13 remaining) [2024-01-31 16:43:13,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 13 remaining) [2024-01-31 16:43:13,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2024-01-31 16:43:13,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:43:13,924 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-01-31 16:43:13,925 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:43:13,925 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 16:43:13,958 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:43:13,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 86 transitions, 190 flow [2024-01-31 16:43:13,966 INFO L124 PetriNetUnfolderBase]: 9/94 cut-off events. [2024-01-31 16:43:13,966 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:43:13,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 9/94 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 299 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2024-01-31 16:43:13,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 86 transitions, 190 flow [2024-01-31 16:43:13,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 86 transitions, 190 flow [2024-01-31 16:43:13,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:43:13,969 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;@29f7dab4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:43:13,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-01-31 16:43:13,971 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:43:13,971 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2024-01-31 16:43:13,971 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:43:13,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:13,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:43:13,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:43:13,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:13,972 INFO L85 PathProgramCache]: Analyzing trace with hash -269657639, now seen corresponding path program 1 times [2024-01-31 16:43:13,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:13,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999287336] [2024-01-31 16:43:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:13,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:43:14,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:14,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999287336] [2024-01-31 16:43:14,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999287336] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:14,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:14,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:43:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317447829] [2024-01-31 16:43:14,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:14,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:43:14,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:43:14,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:43:14,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 86 [2024-01-31 16:43:14,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:14,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:14,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 86 [2024-01-31 16:43:14,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:15,719 INFO L124 PetriNetUnfolderBase]: 9254/21143 cut-off events. [2024-01-31 16:43:15,720 INFO L125 PetriNetUnfolderBase]: For 697/697 co-relation queries the response was YES. [2024-01-31 16:43:15,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34446 conditions, 21143 events. 9254/21143 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 212759 event pairs, 4584 based on Foata normal form. 2601/21425 useless extension candidates. Maximal degree in co-relation 28391. Up to 11960 conditions per place. [2024-01-31 16:43:15,846 INFO L140 encePairwiseOnDemand]: 73/86 looper letters, 55 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2024-01-31 16:43:15,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 340 flow [2024-01-31 16:43:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:43:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:43:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2024-01-31 16:43:15,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6976744186046512 [2024-01-31 16:43:15,853 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 190 flow. Second operand 4 states and 240 transitions. [2024-01-31 16:43:15,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 340 flow [2024-01-31 16:43:15,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 98 transitions, 336 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-31 16:43:15,858 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 170 flow [2024-01-31 16:43:15,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-01-31 16:43:15,858 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2024-01-31 16:43:15,859 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 170 flow [2024-01-31 16:43:15,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:15,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:15,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:43:15,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:43:15,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:43:15,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:15,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1407754892, now seen corresponding path program 1 times [2024-01-31 16:43:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:15,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944866620] [2024-01-31 16:43:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:15,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:15,935 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 16:43:15,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:15,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944866620] [2024-01-31 16:43:15,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944866620] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:15,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:15,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:43:15,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239512743] [2024-01-31 16:43:15,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:15,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:43:15,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:15,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:43:15,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:43:15,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 86 [2024-01-31 16:43:15,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:15,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:15,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 86 [2024-01-31 16:43:15,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:17,378 INFO L124 PetriNetUnfolderBase]: 9371/19179 cut-off events. [2024-01-31 16:43:17,378 INFO L125 PetriNetUnfolderBase]: For 397/397 co-relation queries the response was YES. [2024-01-31 16:43:17,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32361 conditions, 19179 events. 9371/19179 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 174414 event pairs, 2628 based on Foata normal form. 0/17455 useless extension candidates. Maximal degree in co-relation 32344. Up to 11900 conditions per place. [2024-01-31 16:43:17,467 INFO L140 encePairwiseOnDemand]: 83/86 looper letters, 64 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2024-01-31 16:43:17,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 106 transitions, 369 flow [2024-01-31 16:43:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:43:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:43:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-01-31 16:43:17,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6715116279069767 [2024-01-31 16:43:17,470 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 170 flow. Second operand 4 states and 231 transitions. [2024-01-31 16:43:17,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 106 transitions, 369 flow [2024-01-31 16:43:17,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 106 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:43:17,472 INFO L231 Difference]: Finished difference. Result has 82 places, 74 transitions, 169 flow [2024-01-31 16:43:17,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=82, PETRI_TRANSITIONS=74} [2024-01-31 16:43:17,473 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -2 predicate places. [2024-01-31 16:43:17,473 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 74 transitions, 169 flow [2024-01-31 16:43:17,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:17,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:17,474 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-31 16:43:17,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:43:17,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-01-31 16:43:17,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:17,474 INFO L85 PathProgramCache]: Analyzing trace with hash 490799768, now seen corresponding path program 1 times [2024-01-31 16:43:17,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:17,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555681845] [2024-01-31 16:43:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:17,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:17,486 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:43:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:43:17,495 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:43:17,495 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:43:17,496 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 17 remaining) [2024-01-31 16:43:17,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 17 remaining) [2024-01-31 16:43:17,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 17 remaining) [2024-01-31 16:43:17,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 17 remaining) [2024-01-31 16:43:17,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (12 of 17 remaining) [2024-01-31 16:43:17,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 17 remaining) [2024-01-31 16:43:17,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 17 remaining) [2024-01-31 16:43:17,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 17 remaining) [2024-01-31 16:43:17,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (8 of 17 remaining) [2024-01-31 16:43:17,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 17 remaining) [2024-01-31 16:43:17,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 17 remaining) [2024-01-31 16:43:17,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 17 remaining) [2024-01-31 16:43:17,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 17 remaining) [2024-01-31 16:43:17,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 17 remaining) [2024-01-31 16:43:17,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 17 remaining) [2024-01-31 16:43:17,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 17 remaining) [2024-01-31 16:43:17,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (0 of 17 remaining) [2024-01-31 16:43:17,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:43:17,498 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-31 16:43:17,499 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:43:17,499 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-31 16:43:17,535 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:43:17,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 113 transitions, 254 flow [2024-01-31 16:43:17,547 INFO L124 PetriNetUnfolderBase]: 12/124 cut-off events. [2024-01-31 16:43:17,547 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-31 16:43:17,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 124 events. 12/124 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 440 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 107. Up to 5 conditions per place. [2024-01-31 16:43:17,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 113 transitions, 254 flow [2024-01-31 16:43:17,549 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 113 transitions, 254 flow [2024-01-31 16:43:17,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:43:17,550 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;@29f7dab4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:43:17,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-01-31 16:43:17,551 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:43:17,552 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2024-01-31 16:43:17,552 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:43:17,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:17,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:43:17,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-01-31 16:43:17,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1220894023, now seen corresponding path program 1 times [2024-01-31 16:43:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:17,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195419351] [2024-01-31 16:43:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:43:17,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195419351] [2024-01-31 16:43:17,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195419351] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:17,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:17,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:43:17,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628305135] [2024-01-31 16:43:17,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:17,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:43:17,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:17,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:43:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:43:17,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 113 [2024-01-31 16:43:17,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 113 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:17,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:17,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 113 [2024-01-31 16:43:17,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:43:32,669 INFO L124 PetriNetUnfolderBase]: 131484/212991 cut-off events. [2024-01-31 16:43:32,669 INFO L125 PetriNetUnfolderBase]: For 11765/11765 co-relation queries the response was YES. [2024-01-31 16:43:33,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383777 conditions, 212991 events. 131484/212991 cut-off events. For 11765/11765 co-relation queries the response was YES. Maximal size of possible extension queue 5439. Compared 2093509 event pairs, 7668 based on Foata normal form. 37332/237018 useless extension candidates. Maximal degree in co-relation 218046. Up to 152850 conditions per place. [2024-01-31 16:43:34,458 INFO L140 encePairwiseOnDemand]: 97/113 looper letters, 75 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2024-01-31 16:43:34,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 467 flow [2024-01-31 16:43:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:43:34,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:43:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 322 transitions. [2024-01-31 16:43:34,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7123893805309734 [2024-01-31 16:43:34,462 INFO L175 Difference]: Start difference. First operand has 110 places, 113 transitions, 254 flow. Second operand 4 states and 322 transitions. [2024-01-31 16:43:34,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 467 flow [2024-01-31 16:43:34,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 132 transitions, 455 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-01-31 16:43:34,470 INFO L231 Difference]: Finished difference. Result has 107 places, 99 transitions, 224 flow [2024-01-31 16:43:34,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=107, PETRI_TRANSITIONS=99} [2024-01-31 16:43:34,472 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -3 predicate places. [2024-01-31 16:43:34,473 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 99 transitions, 224 flow [2024-01-31 16:43:34,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:34,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:43:34,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:43:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:43:34,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-01-31 16:43:34,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:43:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash 550626711, now seen corresponding path program 1 times [2024-01-31 16:43:34,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:43:34,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366894313] [2024-01-31 16:43:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:43:34,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:43:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:43:34,549 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 16:43:34,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:43:34,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366894313] [2024-01-31 16:43:34,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366894313] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:43:34,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:43:34,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:43:34,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615670701] [2024-01-31 16:43:34,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:43:34,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:43:34,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:43:34,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:43:34,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:43:34,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 113 [2024-01-31 16:43:34,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 99 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:43:34,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:43:34,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 113 [2024-01-31 16:43:34,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand