./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/31_simple_loop5_vs-pthread.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/31_simple_loop5_vs-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-dev-958ec4d-m [2024-02-07 14:23:04,112 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:23:04,178 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:23:04,183 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:23:04,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:23:04,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:23:04,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:23:04,208 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:23:04,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:23:04,212 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:23:04,212 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:23:04,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:23:04,213 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:23:04,214 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:23:04,214 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:23:04,214 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:23:04,214 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:23:04,215 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:23:04,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:23:04,215 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:23:04,215 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:23:04,215 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:23:04,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:23:04,216 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:23:04,216 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:23:04,216 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:23:04,216 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:23:04,217 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:23:04,217 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:23:04,217 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:23:04,218 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:23:04,218 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:23:04,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:23:04,219 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:23:04,219 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:23:04,219 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:23:04,219 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:23:04,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:23:04,219 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:23:04,220 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:23:04,220 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:23:04,220 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:23:04,220 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:23:04,220 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:23:04,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:23:04,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:23:04,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:23:04,443 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:23:04,444 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:23:04,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-02-07 14:23:05,682 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:23:05,940 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:23:05,942 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-02-07 14:23:05,951 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf2db90f6/25977abd1a984adcb7030f5b1695389d/FLAG21caff18a [2024-02-07 14:23:05,965 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf2db90f6/25977abd1a984adcb7030f5b1695389d [2024-02-07 14:23:05,967 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:23:05,967 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:23:05,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml [2024-02-07 14:23:06,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:23:06,081 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:23:06,082 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:23:06,082 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:23:06,085 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:23:06,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:23:05" (1/2) ... [2024-02-07 14:23:06,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6e8ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:23:06, skipping insertion in model container [2024-02-07 14:23:06,087 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:23:05" (1/2) ... [2024-02-07 14:23:06,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a5439e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:23:06, skipping insertion in model container [2024-02-07 14:23:06,088 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:23:06" (2/2) ... [2024-02-07 14:23:06,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6e8ebb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06, skipping insertion in model container [2024-02-07 14:23:06,089 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:23:06" (2/2) ... [2024-02-07 14:23:06,089 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:23:06,210 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:23:06,212 INFO L76 edCorrectnessWitness]: Location invariant before [L697-L697] (((((((((((0 <= b) && (0 <= temp)) && (1 <= b)) && (1 <= temp)) && (b <= 3)) && (b <= 127)) && (temp <= 3)) && (temp <= 127)) && (b != 0)) && (temp != 0)) && ((b == 1 || b == 2) || b == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-02-07 14:23:06,212 INFO L76 edCorrectnessWitness]: Location invariant before [L695-L695] (((((((((((0 <= b) && (0 <= temp)) && (1 <= b)) && (1 <= temp)) && (b <= 3)) && (b <= 127)) && (temp <= 3)) && (temp <= 127)) && (b != 0)) && (temp != 0)) && ((b == 1 || b == 2) || b == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-02-07 14:23:06,212 INFO L76 edCorrectnessWitness]: Location invariant before [L696-L696] (((((((((((0 <= a) && (0 <= c)) && (1 <= a)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (c <= 3)) && (c <= 127)) && (a != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((c == 1 || c == 2) || c == 3) [2024-02-07 14:23:06,212 INFO L76 edCorrectnessWitness]: Location invariant before [L707-L707] (((((((((((0 <= a) && (0 <= b)) && (1 <= a)) && (1 <= b)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (a != 0)) && (b != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3) [2024-02-07 14:23:06,212 INFO L76 edCorrectnessWitness]: Location invariant before [L694-L694] (((((0 <= a) && (1 <= a)) && (a <= 3)) && (a <= 127)) && (a != 0)) && ((a == 1 || a == 2) || a == 3) [2024-02-07 14:23:06,213 INFO L76 edCorrectnessWitness]: Location invariant before [L698-L698] (((((0 <= c) && (1 <= c)) && (c <= 3)) && (c <= 127)) && (c != 0)) && ((c == 1 || c == 2) || c == 3) [2024-02-07 14:23:06,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:23:06,548 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/31_simple_loop5_vs-pthread.i[30648,30661] [2024-02-07 14:23:06,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:23:06,564 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:23:06,679 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/31_simple_loop5_vs-pthread.i[30648,30661] [2024-02-07 14:23:06,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:23:06,714 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:23:06,714 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06 WrapperNode [2024-02-07 14:23:06,714 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:23:06,715 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:23:06,715 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:23:06,715 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:23:06,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,738 INFO L138 Inliner]: procedures = 163, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2024-02-07 14:23:06,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:23:06,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:23:06,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:23:06,739 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:23:06,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,761 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,771 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-02-07 14:23:06,771 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,771 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,792 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,793 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,794 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,800 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:23:06,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:23:06,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:23:06,807 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:23:06,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (1/1) ... [2024-02-07 14:23:06,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:23:06,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:23:06,840 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) [2024-02-07 14:23:06,853 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 [2024-02-07 14:23:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-02-07 14:23:06,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-02-07 14:23:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-07 14:23:06,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-07 14:23:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:23:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:23:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:23:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 14:23:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:23:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:23:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:23:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:23:06,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:23:06,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:23:06,891 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 14:23:06,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:23:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:23:06,893 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:23:06,993 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:23:06,995 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:23:07,170 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:23:07,170 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:23:07,233 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:23:07,234 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-07 14:23:07,234 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:23:07 BoogieIcfgContainer [2024-02-07 14:23:07,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:23:07,236 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:23:07,236 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:23:07,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:23:07,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:23:05" (1/4) ... [2024-02-07 14:23:07,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5af252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:23:07, skipping insertion in model container [2024-02-07 14:23:07,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:23:06" (2/4) ... [2024-02-07 14:23:07,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5af252 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:23:07, skipping insertion in model container [2024-02-07 14:23:07,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:23:06" (3/4) ... [2024-02-07 14:23:07,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5af252 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:23:07, skipping insertion in model container [2024-02-07 14:23:07,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:23:07" (4/4) ... [2024-02-07 14:23:07,241 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2024-02-07 14:23:07,255 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:23:07,255 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-02-07 14:23:07,255 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:23:07,298 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:23:07,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 39 transitions, 86 flow [2024-02-07 14:23:07,367 INFO L124 PetriNetUnfolderBase]: 3/40 cut-off events. [2024-02-07 14:23:07,368 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:23:07,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 40 events. 3/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 71 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2024-02-07 14:23:07,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 39 transitions, 86 flow [2024-02-07 14:23:07,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 38 transitions, 83 flow [2024-02-07 14:23:07,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:23:07,395 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;@5e47ce23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:23:07,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-02-07 14:23:07,403 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:23:07,404 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2024-02-07 14:23:07,404 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:23:07,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:23:07,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:23:07,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:23:07,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:23:07,410 INFO L85 PathProgramCache]: Analyzing trace with hash 245500004, now seen corresponding path program 1 times [2024-02-07 14:23:07,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:23:07,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687775640] [2024-02-07 14:23:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:23:07,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:23:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:23:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:23:07,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:23:07,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687775640] [2024-02-07 14:23:07,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687775640] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:23:07,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:23:07,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:23:07,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461668211] [2024-02-07 14:23:07,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:23:07,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:23:07,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:23:07,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:23:07,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:23:07,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2024-02-07 14:23:07,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:07,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:23:07,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2024-02-07 14:23:07,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:23:08,012 INFO L124 PetriNetUnfolderBase]: 198/459 cut-off events. [2024-02-07 14:23:08,013 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:23:08,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 459 events. 198/459 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2437 event pairs, 70 based on Foata normal form. 98/516 useless extension candidates. Maximal degree in co-relation 800. Up to 269 conditions per place. [2024-02-07 14:23:08,018 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 22 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-02-07 14:23:08,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 41 transitions, 137 flow [2024-02-07 14:23:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:23:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:23:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-02-07 14:23:08,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7521367521367521 [2024-02-07 14:23:08,029 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 83 flow. Second operand 3 states and 88 transitions. [2024-02-07 14:23:08,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 41 transitions, 137 flow [2024-02-07 14:23:08,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 41 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:23:08,033 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 90 flow [2024-02-07 14:23:08,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-02-07 14:23:08,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2024-02-07 14:23:08,037 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 90 flow [2024-02-07 14:23:08,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:08,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:23:08,038 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:23:08,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:23:08,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 14:23:08,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:23:08,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1720951693, now seen corresponding path program 1 times [2024-02-07 14:23:08,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:23:08,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320710687] [2024-02-07 14:23:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:23:08,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:23:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:23:08,052 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:23:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:23:08,074 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:23:08,074 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:23:08,076 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-02-07 14:23:08,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 16 remaining) [2024-02-07 14:23:08,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 16 remaining) [2024-02-07 14:23:08,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 16 remaining) [2024-02-07 14:23:08,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 16 remaining) [2024-02-07 14:23:08,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 16 remaining) [2024-02-07 14:23:08,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 16 remaining) [2024-02-07 14:23:08,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (8 of 16 remaining) [2024-02-07 14:23:08,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 16 remaining) [2024-02-07 14:23:08,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 16 remaining) [2024-02-07 14:23:08,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 16 remaining) [2024-02-07 14:23:08,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 16 remaining) [2024-02-07 14:23:08,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 16 remaining) [2024-02-07 14:23:08,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 16 remaining) [2024-02-07 14:23:08,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 16 remaining) [2024-02-07 14:23:08,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 16 remaining) [2024-02-07 14:23:08,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:23:08,080 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 14:23:08,082 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:23:08,082 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 14:23:08,104 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:23:08,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 71 transitions, 162 flow [2024-02-07 14:23:08,112 INFO L124 PetriNetUnfolderBase]: 4/61 cut-off events. [2024-02-07 14:23:08,112 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:23:08,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 61 events. 4/61 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 149 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 68. Up to 3 conditions per place. [2024-02-07 14:23:08,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 71 transitions, 162 flow [2024-02-07 14:23:08,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 125 flow [2024-02-07 14:23:08,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:23:08,115 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;@5e47ce23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:23:08,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2024-02-07 14:23:08,117 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:23:08,117 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2024-02-07 14:23:08,117 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:23:08,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:23:08,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:23:08,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 20 more)] === [2024-02-07 14:23:08,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:23:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1821680971, now seen corresponding path program 1 times [2024-02-07 14:23:08,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:23:08,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497125466] [2024-02-07 14:23:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:23:08,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:23:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:23:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:23:08,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:23:08,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497125466] [2024-02-07 14:23:08,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497125466] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:23:08,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:23:08,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:23:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891941972] [2024-02-07 14:23:08,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:23:08,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:23:08,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:23:08,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:23:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:23:08,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 71 [2024-02-07 14:23:08,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:08,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:23:08,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 71 [2024-02-07 14:23:08,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:23:08,609 INFO L124 PetriNetUnfolderBase]: 2762/5033 cut-off events. [2024-02-07 14:23:08,609 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-02-07 14:23:08,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9107 conditions, 5033 events. 2762/5033 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38126 event pairs, 871 based on Foata normal form. 1053/5611 useless extension candidates. Maximal degree in co-relation 9096. Up to 3634 conditions per place. [2024-02-07 14:23:08,694 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 33 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-02-07 14:23:08,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 214 flow [2024-02-07 14:23:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:23:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:23:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2024-02-07 14:23:08,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7089201877934272 [2024-02-07 14:23:08,696 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 125 flow. Second operand 3 states and 151 transitions. [2024-02-07 14:23:08,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 214 flow [2024-02-07 14:23:08,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:23:08,699 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 139 flow [2024-02-07 14:23:08,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-02-07 14:23:08,699 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2024-02-07 14:23:08,700 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 139 flow [2024-02-07 14:23:08,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:08,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:23:08,700 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:23:08,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:23:08,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 20 more)] === [2024-02-07 14:23:08,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:23:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash 582639861, now seen corresponding path program 1 times [2024-02-07 14:23:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:23:08,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117399250] [2024-02-07 14:23:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:23:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:23:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:23:08,712 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:23:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:23:08,720 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:23:08,720 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:23:08,721 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2024-02-07 14:23:08,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 23 remaining) [2024-02-07 14:23:08,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 23 remaining) [2024-02-07 14:23:08,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 23 remaining) [2024-02-07 14:23:08,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 23 remaining) [2024-02-07 14:23:08,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 23 remaining) [2024-02-07 14:23:08,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 23 remaining) [2024-02-07 14:23:08,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (15 of 23 remaining) [2024-02-07 14:23:08,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 23 remaining) [2024-02-07 14:23:08,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 23 remaining) [2024-02-07 14:23:08,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 23 remaining) [2024-02-07 14:23:08,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 23 remaining) [2024-02-07 14:23:08,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 23 remaining) [2024-02-07 14:23:08,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 23 remaining) [2024-02-07 14:23:08,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 23 remaining) [2024-02-07 14:23:08,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 23 remaining) [2024-02-07 14:23:08,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 23 remaining) [2024-02-07 14:23:08,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 23 remaining) [2024-02-07 14:23:08,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 23 remaining) [2024-02-07 14:23:08,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 23 remaining) [2024-02-07 14:23:08,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 23 remaining) [2024-02-07 14:23:08,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 23 remaining) [2024-02-07 14:23:08,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 23 remaining) [2024-02-07 14:23:08,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:23:08,725 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 14:23:08,726 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:23:08,726 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 14:23:08,756 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:23:08,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 103 transitions, 242 flow [2024-02-07 14:23:08,764 INFO L124 PetriNetUnfolderBase]: 5/82 cut-off events. [2024-02-07 14:23:08,765 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-07 14:23:08,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 82 events. 5/82 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 241 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2024-02-07 14:23:08,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 103 transitions, 242 flow [2024-02-07 14:23:08,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 74 transitions, 169 flow [2024-02-07 14:23:08,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:23:08,768 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;@5e47ce23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:23:08,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-02-07 14:23:08,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:23:08,770 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2024-02-07 14:23:08,770 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:23:08,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:23:08,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:23:08,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 27 more)] === [2024-02-07 14:23:08,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:23:08,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1627494011, now seen corresponding path program 1 times [2024-02-07 14:23:08,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:23:08,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330911983] [2024-02-07 14:23:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:23:08,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:23:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:23:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:23:08,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:23:08,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330911983] [2024-02-07 14:23:08,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330911983] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:23:08,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:23:08,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:23:08,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006357955] [2024-02-07 14:23:08,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:23:08,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:23:08,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:23:08,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:23:08,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:23:08,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 103 [2024-02-07 14:23:08,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:08,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:23:08,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 103 [2024-02-07 14:23:08,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:23:12,764 INFO L124 PetriNetUnfolderBase]: 30486/49170 cut-off events. [2024-02-07 14:23:12,765 INFO L125 PetriNetUnfolderBase]: For 2328/2328 co-relation queries the response was YES. [2024-02-07 14:23:12,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90245 conditions, 49170 events. 30486/49170 cut-off events. For 2328/2328 co-relation queries the response was YES. Maximal size of possible extension queue 2430. Compared 435331 event pairs, 10459 based on Foata normal form. 10289/54399 useless extension candidates. Maximal degree in co-relation 90233. Up to 38429 conditions per place. [2024-02-07 14:23:13,078 INFO L140 encePairwiseOnDemand]: 88/103 looper letters, 44 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2024-02-07 14:23:13,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 295 flow [2024-02-07 14:23:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:23:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:23:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2024-02-07 14:23:13,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925566343042071 [2024-02-07 14:23:13,085 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 169 flow. Second operand 3 states and 214 transitions. [2024-02-07 14:23:13,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 295 flow [2024-02-07 14:23:13,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 290 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-02-07 14:23:13,092 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 188 flow [2024-02-07 14:23:13,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-02-07 14:23:13,093 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2024-02-07 14:23:13,093 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 188 flow [2024-02-07 14:23:13,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:13,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:23:13,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:23:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:23:13,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 27 more)] === [2024-02-07 14:23:13,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:23:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash -31703934, now seen corresponding path program 1 times [2024-02-07 14:23:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:23:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453272372] [2024-02-07 14:23:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:23:13,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:23:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:23:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:23:13,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:23:13,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453272372] [2024-02-07 14:23:13,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453272372] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:23:13,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:23:13,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:23:13,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499200646] [2024-02-07 14:23:13,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:23:13,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:23:13,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:23:13,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:23:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:23:13,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 103 [2024-02-07 14:23:13,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:13,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:23:13,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 103 [2024-02-07 14:23:13,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:23:19,244 INFO L124 PetriNetUnfolderBase]: 61005/91191 cut-off events. [2024-02-07 14:23:19,244 INFO L125 PetriNetUnfolderBase]: For 16569/16569 co-relation queries the response was YES. [2024-02-07 14:23:19,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190300 conditions, 91191 events. 61005/91191 cut-off events. For 16569/16569 co-relation queries the response was YES. Maximal size of possible extension queue 4532. Compared 791939 event pairs, 8926 based on Foata normal form. 741/83599 useless extension candidates. Maximal degree in co-relation 190286. Up to 74680 conditions per place. [2024-02-07 14:23:20,189 INFO L140 encePairwiseOnDemand]: 90/103 looper letters, 76 selfloop transitions, 13 changer transitions 0/118 dead transitions. [2024-02-07 14:23:20,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 506 flow [2024-02-07 14:23:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:23:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:23:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2024-02-07 14:23:20,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6116504854368932 [2024-02-07 14:23:20,191 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 188 flow. Second operand 5 states and 315 transitions. [2024-02-07 14:23:20,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 506 flow [2024-02-07 14:23:20,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 502 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:23:20,209 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 277 flow [2024-02-07 14:23:20,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2024-02-07 14:23:20,211 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2024-02-07 14:23:20,211 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 277 flow [2024-02-07 14:23:20,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:20,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:23:20,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:23:20,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:23:20,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 27 more)] === [2024-02-07 14:23:20,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:23:20,213 INFO L85 PathProgramCache]: Analyzing trace with hash -982821528, now seen corresponding path program 1 times [2024-02-07 14:23:20,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:23:20,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988227616] [2024-02-07 14:23:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:23:20,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:23:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:23:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:23:20,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:23:20,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988227616] [2024-02-07 14:23:20,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988227616] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:23:20,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:23:20,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:23:20,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88882398] [2024-02-07 14:23:20,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:23:20,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:23:20,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:23:20,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:23:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:23:20,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 103 [2024-02-07 14:23:20,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:20,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:23:20,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 103 [2024-02-07 14:23:20,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:23:28,335 INFO L124 PetriNetUnfolderBase]: 71225/106505 cut-off events. [2024-02-07 14:23:28,335 INFO L125 PetriNetUnfolderBase]: For 42738/43647 co-relation queries the response was YES. [2024-02-07 14:23:28,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248964 conditions, 106505 events. 71225/106505 cut-off events. For 42738/43647 co-relation queries the response was YES. Maximal size of possible extension queue 5108. Compared 930243 event pairs, 13291 based on Foata normal form. 2847/106053 useless extension candidates. Maximal degree in co-relation 248946. Up to 82503 conditions per place. [2024-02-07 14:23:29,228 INFO L140 encePairwiseOnDemand]: 86/103 looper letters, 86 selfloop transitions, 20 changer transitions 0/136 dead transitions. [2024-02-07 14:23:29,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 136 transitions, 695 flow [2024-02-07 14:23:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:23:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:23:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 344 transitions. [2024-02-07 14:23:29,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6679611650485436 [2024-02-07 14:23:29,230 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 277 flow. Second operand 5 states and 344 transitions. [2024-02-07 14:23:29,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 136 transitions, 695 flow [2024-02-07 14:23:29,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 136 transitions, 684 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:23:29,239 INFO L231 Difference]: Finished difference. Result has 86 places, 93 transitions, 416 flow [2024-02-07 14:23:29,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=416, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2024-02-07 14:23:29,240 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 7 predicate places. [2024-02-07 14:23:29,240 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 416 flow [2024-02-07 14:23:29,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:29,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:23:29,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:23:29,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:23:29,241 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 27 more)] === [2024-02-07 14:23:29,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:23:29,241 INFO L85 PathProgramCache]: Analyzing trace with hash -402695868, now seen corresponding path program 1 times [2024-02-07 14:23:29,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:23:29,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186014123] [2024-02-07 14:23:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:23:29,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:23:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:23:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:23:29,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:23:29,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186014123] [2024-02-07 14:23:29,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186014123] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:23:29,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:23:29,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:23:29,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538387060] [2024-02-07 14:23:29,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:23:29,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:23:29,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:23:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:23:29,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:23:29,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 103 [2024-02-07 14:23:29,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 416 flow. Second operand has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:23:29,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:23:29,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 103 [2024-02-07 14:23:29,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand