./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/40_barrier_vf-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d8006e4b Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/40_barrier_vf-pthread.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-d8006e4-m [2024-02-05 10:37:59,803 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:37:59,845 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:37:59,855 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:37:59,856 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:37:59,880 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:37:59,881 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:37:59,881 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:37:59,882 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:37:59,882 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:37:59,882 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:37:59,882 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:37:59,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:37:59,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:37:59,883 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:37:59,883 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:37:59,884 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:37:59,884 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:37:59,884 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:37:59,884 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:37:59,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:37:59,885 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:37:59,885 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:37:59,885 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:37:59,885 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:37:59,886 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:37:59,886 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:37:59,886 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:37:59,886 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:37:59,886 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:37:59,887 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:37:59,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:37:59,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:37:59,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:37:59,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:37:59,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:37:59,888 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:37:59,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:37:59,888 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:37:59,888 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:37:59,888 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:37:59,894 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:37:59,894 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:37:59,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:38:00,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:38:00,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:38:00,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:38:00,128 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:38:00,129 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:38:00,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/40_barrier_vf-pthread.yml/witness.yml [2024-02-05 10:38:00,242 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:38:00,242 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:38:00,242 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2024-02-05 10:38:01,189 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:38:01,400 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:38:01,401 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2024-02-05 10:38:01,414 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e2c07672/fb17f953e3164c16b8ea4c36b6fa0f52/FLAG533fd2544 [2024-02-05 10:38:01,429 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e2c07672/fb17f953e3164c16b8ea4c36b6fa0f52 [2024-02-05 10:38:01,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:38:01,433 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:38:01,435 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:38:01,435 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:38:01,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:38:01,439 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:38:00" (1/2) ... [2024-02-05 10:38:01,440 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0b46ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:38:01, skipping insertion in model container [2024-02-05 10:38:01,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:38:00" (1/2) ... [2024-02-05 10:38:01,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4349041b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:38:01, skipping insertion in model container [2024-02-05 10:38:01,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:38:01" (2/2) ... [2024-02-05 10:38:01,442 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0b46ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01, skipping insertion in model container [2024-02-05 10:38:01,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:38:01" (2/2) ... [2024-02-05 10:38:01,442 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:38:01,473 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:38:01,474 INFO L101 nessWitnessExtractor]: Location invariant before [L704-L704] (unsigned long )arg == 0UL [2024-02-05 10:38:01,474 INFO L101 nessWitnessExtractor]: Location invariant before [L693-L693] COND == (_Bool)0 || COND == (_Bool)1 [2024-02-05 10:38:01,474 INFO L101 nessWitnessExtractor]: Location invariant before [L704-L704] (unsigned long )arg == 0UL [2024-02-05 10:38:01,475 INFO L101 nessWitnessExtractor]: Location invariant before [L703-L703] (unsigned long )arg == 0UL [2024-02-05 10:38:01,475 INFO L101 nessWitnessExtractor]: Location invariant after [L704-L704] (unsigned long )arg == 0UL [2024-02-05 10:38:01,475 INFO L101 nessWitnessExtractor]: Location invariant before [L697-L697] (COND == (_Bool)1) && ((unsigned int )count == 3U) [2024-02-05 10:38:01,476 INFO L101 nessWitnessExtractor]: Location invariant before [L694-L694] COND == (_Bool)0 || COND == (_Bool)1 [2024-02-05 10:38:01,476 INFO L101 nessWitnessExtractor]: Location invariant before [L700-L700] COND == (_Bool)0 [2024-02-05 10:38:01,476 INFO L101 nessWitnessExtractor]: Location invariant before [L701-L701] COND == (_Bool)1 [2024-02-05 10:38:01,476 INFO L101 nessWitnessExtractor]: Location invariant before [L695-L695] ((unsigned int )count == 3U) && (COND == (_Bool)0 || COND == (_Bool)1) [2024-02-05 10:38:01,476 INFO L101 nessWitnessExtractor]: Loop invariant at [L699-L699] COND == (_Bool)0 || COND == (_Bool)1 [2024-02-05 10:38:01,476 INFO L101 nessWitnessExtractor]: Location invariant before [L696-L696] (COND == (_Bool)1) && ((unsigned int )count == 3U) [2024-02-05 10:38:01,515 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:38:01,836 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i[30842,30855] [2024-02-05 10:38:01,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:38:01,853 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:38:01,929 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i[30842,30855] Start Parsing Local [2024-02-05 10:38:01,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:38:01,969 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:38:01,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01 WrapperNode [2024-02-05 10:38:01,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:38:01,970 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:38:01,970 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:38:01,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:38:01,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:01,987 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,015 INFO L138 Inliner]: procedures = 165, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2024-02-05 10:38:02,016 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:38:02,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:38:02,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:38:02,018 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:38:02,030 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,033 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,044 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 10, 1]. 56 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 10, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-02-05 10:38:02,045 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,050 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,053 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,057 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,057 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,059 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:38:02,060 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:38:02,060 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:38:02,060 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:38:02,060 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (1/1) ... [2024-02-05 10:38:02,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:38:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:38:02,082 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) [2024-02-05 10:38:02,086 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 [2024-02-05 10:38:02,109 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-05 10:38:02,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-05 10:38:02,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:38:02,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:38:02,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:38:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-05 10:38:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-05 10:38:02,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:38:02,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:38:02,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:38:02,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:38:02,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:38:02,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:38:02,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-05 10:38:02,118 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-05 10:38:02,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:38:02,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:38:02,119 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-05 10:38:02,215 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:38:02,216 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:38:02,383 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:38:02,384 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:38:02,476 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:38:02,477 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-05 10:38:02,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:38:02 BoogieIcfgContainer [2024-02-05 10:38:02,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:38:02,479 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:38:02,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:38:02,482 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:38:02,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:38:00" (1/4) ... [2024-02-05 10:38:02,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62741866 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:38:02, skipping insertion in model container [2024-02-05 10:38:02,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:38:01" (2/4) ... [2024-02-05 10:38:02,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62741866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:38:02, skipping insertion in model container [2024-02-05 10:38:02,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:01" (3/4) ... [2024-02-05 10:38:02,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62741866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:38:02, skipping insertion in model container [2024-02-05 10:38:02,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:38:02" (4/4) ... [2024-02-05 10:38:02,486 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf-pthread.i [2024-02-05 10:38:02,499 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:38:02,500 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-02-05 10:38:02,500 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:38:02,553 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:38:02,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 44 transitions, 92 flow [2024-02-05 10:38:02,613 INFO L124 PetriNetUnfolderBase]: 4/46 cut-off events. [2024-02-05 10:38:02,613 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:38:02,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 46 events. 4/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 72 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 41. Up to 3 conditions per place. [2024-02-05 10:38:02,616 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 44 transitions, 92 flow [2024-02-05 10:38:02,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 44 transitions, 92 flow [2024-02-05 10:38:02,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:38:02,634 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;@2bbc5471, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:38:02,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-02-05 10:38:02,638 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:38:02,638 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-02-05 10:38:02,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:38:02,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:02,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:38:02,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-05 10:38:02,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:02,644 INFO L85 PathProgramCache]: Analyzing trace with hash 236594894, now seen corresponding path program 1 times [2024-02-05 10:38:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:02,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5866668] [2024-02-05 10:38:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:02,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:02,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5866668] [2024-02-05 10:38:02,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5866668] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:38:02,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:38:02,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:38:02,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413998666] [2024-02-05 10:38:02,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:38:02,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:38:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:03,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:38:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:38:03,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 44 [2024-02-05 10:38:03,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:38:03,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:03,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 44 [2024-02-05 10:38:03,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:03,101 INFO L124 PetriNetUnfolderBase]: 22/115 cut-off events. [2024-02-05 10:38:03,101 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:38:03,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 115 events. 22/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 422 event pairs, 0 based on Foata normal form. 12/106 useless extension candidates. Maximal degree in co-relation 159. Up to 46 conditions per place. [2024-02-05 10:38:03,103 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 15 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-02-05 10:38:03,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 116 flow [2024-02-05 10:38:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:38:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:38:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-02-05 10:38:03,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2024-02-05 10:38:03,113 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 4 states and 114 transitions. [2024-02-05 10:38:03,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 116 flow [2024-02-05 10:38:03,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:38:03,117 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 80 flow [2024-02-05 10:38:03,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-02-05 10:38:03,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2024-02-05 10:38:03,120 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 80 flow [2024-02-05 10:38:03,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:38:03,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:03,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-05 10:38:03,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:38:03,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-05 10:38:03,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:03,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1255523799, now seen corresponding path program 1 times [2024-02-05 10:38:03,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:03,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159099179] [2024-02-05 10:38:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:03,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:38:03,141 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:38:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:38:03,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:38:03,163 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:38:03,164 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-02-05 10:38:03,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 25 remaining) [2024-02-05 10:38:03,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 25 remaining) [2024-02-05 10:38:03,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 25 remaining) [2024-02-05 10:38:03,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 25 remaining) [2024-02-05 10:38:03,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 25 remaining) [2024-02-05 10:38:03,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 25 remaining) [2024-02-05 10:38:03,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 25 remaining) [2024-02-05 10:38:03,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 25 remaining) [2024-02-05 10:38:03,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 25 remaining) [2024-02-05 10:38:03,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 25 remaining) [2024-02-05 10:38:03,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 25 remaining) [2024-02-05 10:38:03,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (12 of 25 remaining) [2024-02-05 10:38:03,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 25 remaining) [2024-02-05 10:38:03,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 25 remaining) [2024-02-05 10:38:03,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 25 remaining) [2024-02-05 10:38:03,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 25 remaining) [2024-02-05 10:38:03,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 25 remaining) [2024-02-05 10:38:03,170 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 25 remaining) [2024-02-05 10:38:03,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 25 remaining) [2024-02-05 10:38:03,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 25 remaining) [2024-02-05 10:38:03,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 25 remaining) [2024-02-05 10:38:03,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 25 remaining) [2024-02-05 10:38:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 25 remaining) [2024-02-05 10:38:03,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (0 of 25 remaining) [2024-02-05 10:38:03,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:38:03,180 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-05 10:38:03,183 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-05 10:38:03,183 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-05 10:38:03,206 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:38:03,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 176 flow [2024-02-05 10:38:03,231 INFO L124 PetriNetUnfolderBase]: 8/88 cut-off events. [2024-02-05 10:38:03,232 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:38:03,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 88 events. 8/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 79. Up to 3 conditions per place. [2024-02-05 10:38:03,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 83 transitions, 176 flow [2024-02-05 10:38:03,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 83 transitions, 176 flow [2024-02-05 10:38:03,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:38:03,235 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;@2bbc5471, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:38:03,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2024-02-05 10:38:03,238 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:38:03,238 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-02-05 10:38:03,238 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:38:03,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:03,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:38:03,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-05 10:38:03,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:03,238 INFO L85 PathProgramCache]: Analyzing trace with hash 315839943, now seen corresponding path program 1 times [2024-02-05 10:38:03,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:03,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494949920] [2024-02-05 10:38:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:03,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:03,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:03,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494949920] [2024-02-05 10:38:03,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494949920] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:38:03,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:38:03,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:38:03,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456216055] [2024-02-05 10:38:03,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:38:03,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:38:03,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:03,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:38:03,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:38:03,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 83 [2024-02-05 10:38:03,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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) [2024-02-05 10:38:03,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:03,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 83 [2024-02-05 10:38:03,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:03,603 INFO L124 PetriNetUnfolderBase]: 578/1733 cut-off events. [2024-02-05 10:38:03,604 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-05 10:38:03,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 1733 events. 578/1733 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 13409 event pairs, 56 based on Foata normal form. 234/1585 useless extension candidates. Maximal degree in co-relation 2401. Up to 804 conditions per place. [2024-02-05 10:38:03,615 INFO L140 encePairwiseOnDemand]: 71/83 looper letters, 35 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2024-02-05 10:38:03,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 257 flow [2024-02-05 10:38:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:38:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:38:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2024-02-05 10:38:03,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7228915662650602 [2024-02-05 10:38:03,621 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 176 flow. Second operand 4 states and 240 transitions. [2024-02-05 10:38:03,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 257 flow [2024-02-05 10:38:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:38:03,623 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 156 flow [2024-02-05 10:38:03,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-02-05 10:38:03,623 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2024-02-05 10:38:03,624 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 156 flow [2024-02-05 10:38:03,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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) [2024-02-05 10:38:03,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:03,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:38:03,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:38:03,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-05 10:38:03,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:03,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1085225256, now seen corresponding path program 1 times [2024-02-05 10:38:03,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:03,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302353847] [2024-02-05 10:38:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:03,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:03,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:03,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302353847] [2024-02-05 10:38:03,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302353847] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:38:03,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:38:03,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:38:03,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046932515] [2024-02-05 10:38:03,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:38:03,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:38:03,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:03,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:38:03,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:38:03,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 83 [2024-02-05 10:38:03,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2024-02-05 10:38:03,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:03,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 83 [2024-02-05 10:38:03,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:03,951 INFO L124 PetriNetUnfolderBase]: 1076/2398 cut-off events. [2024-02-05 10:38:03,951 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-02-05 10:38:03,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4106 conditions, 2398 events. 1076/2398 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17080 event pairs, 335 based on Foata normal form. 162/2391 useless extension candidates. Maximal degree in co-relation 4090. Up to 1402 conditions per place. [2024-02-05 10:38:03,962 INFO L140 encePairwiseOnDemand]: 70/83 looper letters, 49 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2024-02-05 10:38:03,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 295 flow [2024-02-05 10:38:03,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:38:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:38:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-02-05 10:38:03,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6947791164658634 [2024-02-05 10:38:03,964 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 156 flow. Second operand 3 states and 173 transitions. [2024-02-05 10:38:03,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 295 flow [2024-02-05 10:38:03,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 86 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:38:03,966 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 190 flow [2024-02-05 10:38:03,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2024-02-05 10:38:03,966 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -4 predicate places. [2024-02-05 10:38:03,967 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 190 flow [2024-02-05 10:38:03,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2024-02-05 10:38:03,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:03,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-05 10:38:03,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:38:03,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-05 10:38:03,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1151416436, now seen corresponding path program 1 times [2024-02-05 10:38:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:03,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632703014] [2024-02-05 10:38:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:03,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:38:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632703014] [2024-02-05 10:38:04,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632703014] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:38:04,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:38:04,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:38:04,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630172055] [2024-02-05 10:38:04,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:38:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:38:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:38:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:38:04,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 83 [2024-02-05 10:38:04,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2024-02-05 10:38:04,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 83 [2024-02-05 10:38:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:04,199 INFO L124 PetriNetUnfolderBase]: 539/1463 cut-off events. [2024-02-05 10:38:04,199 INFO L125 PetriNetUnfolderBase]: For 92/116 co-relation queries the response was YES. [2024-02-05 10:38:04,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2530 conditions, 1463 events. 539/1463 cut-off events. For 92/116 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10679 event pairs, 21 based on Foata normal form. 60/1407 useless extension candidates. Maximal degree in co-relation 2513. Up to 737 conditions per place. [2024-02-05 10:38:04,208 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 46 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-02-05 10:38:04,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 330 flow [2024-02-05 10:38:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:38:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:38:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2024-02-05 10:38:04,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.713855421686747 [2024-02-05 10:38:04,210 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 190 flow. Second operand 4 states and 237 transitions. [2024-02-05 10:38:04,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 330 flow [2024-02-05 10:38:04,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:38:04,213 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 185 flow [2024-02-05 10:38:04,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-02-05 10:38:04,213 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, -5 predicate places. [2024-02-05 10:38:04,214 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 185 flow [2024-02-05 10:38:04,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2024-02-05 10:38:04,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:04,214 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-02-05 10:38:04,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:38:04,215 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 34 more)] === [2024-02-05 10:38:04,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:04,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1334201948, now seen corresponding path program 1 times [2024-02-05 10:38:04,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:04,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464006593] [2024-02-05 10:38:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:04,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:38:04,225 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:38:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:38:04,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:38:04,233 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:38:04,233 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (36 of 37 remaining) [2024-02-05 10:38:04,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 37 remaining) [2024-02-05 10:38:04,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 37 remaining) [2024-02-05 10:38:04,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 37 remaining) [2024-02-05 10:38:04,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 37 remaining) [2024-02-05 10:38:04,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 37 remaining) [2024-02-05 10:38:04,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 37 remaining) [2024-02-05 10:38:04,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 37 remaining) [2024-02-05 10:38:04,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 37 remaining) [2024-02-05 10:38:04,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 37 remaining) [2024-02-05 10:38:04,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 37 remaining) [2024-02-05 10:38:04,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 37 remaining) [2024-02-05 10:38:04,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (24 of 37 remaining) [2024-02-05 10:38:04,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 37 remaining) [2024-02-05 10:38:04,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 37 remaining) [2024-02-05 10:38:04,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 37 remaining) [2024-02-05 10:38:04,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 37 remaining) [2024-02-05 10:38:04,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 37 remaining) [2024-02-05 10:38:04,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 37 remaining) [2024-02-05 10:38:04,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 37 remaining) [2024-02-05 10:38:04,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 37 remaining) [2024-02-05 10:38:04,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 37 remaining) [2024-02-05 10:38:04,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 37 remaining) [2024-02-05 10:38:04,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 37 remaining) [2024-02-05 10:38:04,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (12 of 37 remaining) [2024-02-05 10:38:04,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 37 remaining) [2024-02-05 10:38:04,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 37 remaining) [2024-02-05 10:38:04,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 37 remaining) [2024-02-05 10:38:04,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 37 remaining) [2024-02-05 10:38:04,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 37 remaining) [2024-02-05 10:38:04,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 37 remaining) [2024-02-05 10:38:04,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 37 remaining) [2024-02-05 10:38:04,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 37 remaining) [2024-02-05 10:38:04,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 37 remaining) [2024-02-05 10:38:04,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 37 remaining) [2024-02-05 10:38:04,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 37 remaining) [2024-02-05 10:38:04,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (0 of 37 remaining) [2024-02-05 10:38:04,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:38:04,240 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-02-05 10:38:04,241 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-05 10:38:04,241 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-05 10:38:04,264 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:38:04,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 262 flow [2024-02-05 10:38:04,276 INFO L124 PetriNetUnfolderBase]: 12/130 cut-off events. [2024-02-05 10:38:04,276 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-05 10:38:04,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 130 events. 12/130 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 504 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 117. Up to 4 conditions per place. [2024-02-05 10:38:04,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 122 transitions, 262 flow [2024-02-05 10:38:04,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 122 transitions, 262 flow [2024-02-05 10:38:04,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:38:04,280 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;@2bbc5471, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:38:04,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2024-02-05 10:38:04,282 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:38:04,282 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-05 10:38:04,282 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:38:04,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:04,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:38:04,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-05 10:38:04,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash 432301671, now seen corresponding path program 1 times [2024-02-05 10:38:04,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:04,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185591707] [2024-02-05 10:38:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:04,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:04,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:04,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185591707] [2024-02-05 10:38:04,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185591707] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:38:04,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:38:04,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:38:04,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426829163] [2024-02-05 10:38:04,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:38:04,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:38:04,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:38:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:38:04,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2024-02-05 10:38:04,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 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) [2024-02-05 10:38:04,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:04,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2024-02-05 10:38:04,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:05,736 INFO L124 PetriNetUnfolderBase]: 9160/21040 cut-off events. [2024-02-05 10:38:05,736 INFO L125 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2024-02-05 10:38:05,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33337 conditions, 21040 events. 9160/21040 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 223550 event pairs, 780 based on Foata normal form. 3510/20364 useless extension candidates. Maximal degree in co-relation 27210. Up to 11134 conditions per place. [2024-02-05 10:38:05,862 INFO L140 encePairwiseOnDemand]: 107/122 looper letters, 55 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2024-02-05 10:38:05,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 129 transitions, 402 flow [2024-02-05 10:38:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:38:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:38:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2024-02-05 10:38:05,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-02-05 10:38:05,863 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 262 flow. Second operand 4 states and 366 transitions. [2024-02-05 10:38:05,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 129 transitions, 402 flow [2024-02-05 10:38:05,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 129 transitions, 398 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-05 10:38:05,866 INFO L231 Difference]: Finished difference. Result has 110 places, 106 transitions, 232 flow [2024-02-05 10:38:05,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=110, PETRI_TRANSITIONS=106} [2024-02-05 10:38:05,866 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -7 predicate places. [2024-02-05 10:38:05,867 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 106 transitions, 232 flow [2024-02-05 10:38:05,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 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) [2024-02-05 10:38:05,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:05,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-05 10:38:05,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:38:05,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-05 10:38:05,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:05,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1973492660, now seen corresponding path program 1 times [2024-02-05 10:38:05,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:05,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227871] [2024-02-05 10:38:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:05,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:38:05,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:05,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227871] [2024-02-05 10:38:05,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227871] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:38:05,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:38:05,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:38:05,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255079275] [2024-02-05 10:38:05,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:38:05,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:38:05,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:05,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:38:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:38:05,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2024-02-05 10:38:05,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 106 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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) [2024-02-05 10:38:05,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:05,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2024-02-05 10:38:05,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:07,404 INFO L124 PetriNetUnfolderBase]: 9103/22029 cut-off events. [2024-02-05 10:38:07,404 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2024-02-05 10:38:07,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34204 conditions, 22029 events. 9103/22029 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 242012 event pairs, 2044 based on Foata normal form. 660/18131 useless extension candidates. Maximal degree in co-relation 34187. Up to 11028 conditions per place. [2024-02-05 10:38:07,608 INFO L140 encePairwiseOnDemand]: 117/122 looper letters, 64 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2024-02-05 10:38:07,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 427 flow [2024-02-05 10:38:07,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:38:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:38:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2024-02-05 10:38:07,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7315573770491803 [2024-02-05 10:38:07,609 INFO L175 Difference]: Start difference. First operand has 110 places, 106 transitions, 232 flow. Second operand 4 states and 357 transitions. [2024-02-05 10:38:07,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 427 flow [2024-02-05 10:38:07,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 135 transitions, 424 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:38:07,612 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 227 flow [2024-02-05 10:38:07,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-02-05 10:38:07,613 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2024-02-05 10:38:07,613 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 227 flow [2024-02-05 10:38:07,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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) [2024-02-05 10:38:07,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:07,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:38:07,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:38:07,614 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-05 10:38:07,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1907340430, now seen corresponding path program 1 times [2024-02-05 10:38:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:07,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892343662] [2024-02-05 10:38:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:07,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:07,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:07,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892343662] [2024-02-05 10:38:07,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892343662] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:38:07,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:38:07,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:38:07,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185863821] [2024-02-05 10:38:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:38:07,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:38:07,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:38:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:38:07,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 122 [2024-02-05 10:38:07,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 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) [2024-02-05 10:38:07,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:07,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 122 [2024-02-05 10:38:07,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:10,472 INFO L124 PetriNetUnfolderBase]: 32481/54102 cut-off events. [2024-02-05 10:38:10,473 INFO L125 PetriNetUnfolderBase]: For 667/667 co-relation queries the response was YES. [2024-02-05 10:38:10,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97614 conditions, 54102 events. 32481/54102 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 2795. Compared 487181 event pairs, 10368 based on Foata normal form. 1690/52264 useless extension candidates. Maximal degree in co-relation 97598. Up to 40618 conditions per place. [2024-02-05 10:38:10,809 INFO L140 encePairwiseOnDemand]: 103/122 looper letters, 72 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2024-02-05 10:38:10,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 125 transitions, 435 flow [2024-02-05 10:38:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:38:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:38:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2024-02-05 10:38:10,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6994535519125683 [2024-02-05 10:38:10,811 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 227 flow. Second operand 3 states and 256 transitions. [2024-02-05 10:38:10,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 125 transitions, 435 flow [2024-02-05 10:38:10,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:38:10,815 INFO L231 Difference]: Finished difference. Result has 109 places, 106 transitions, 278 flow [2024-02-05 10:38:10,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=109, PETRI_TRANSITIONS=106} [2024-02-05 10:38:10,816 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -8 predicate places. [2024-02-05 10:38:10,816 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 278 flow [2024-02-05 10:38:10,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 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) [2024-02-05 10:38:10,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:10,817 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-02-05 10:38:10,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:38:10,817 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-05 10:38:10,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:10,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1385600840, now seen corresponding path program 1 times [2024-02-05 10:38:10,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:10,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361046683] [2024-02-05 10:38:10,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:10,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-05 10:38:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:11,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361046683] [2024-02-05 10:38:11,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361046683] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:38:11,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:38:11,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:38:11,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055092607] [2024-02-05 10:38:11,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:38:11,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:38:11,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:11,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:38:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:38:11,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2024-02-05 10:38:11,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2024-02-05 10:38:11,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:11,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2024-02-05 10:38:11,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:12,420 INFO L124 PetriNetUnfolderBase]: 10888/22230 cut-off events. [2024-02-05 10:38:12,420 INFO L125 PetriNetUnfolderBase]: For 1821/2706 co-relation queries the response was YES. [2024-02-05 10:38:12,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40222 conditions, 22230 events. 10888/22230 cut-off events. For 1821/2706 co-relation queries the response was YES. Maximal size of possible extension queue 1277. Compared 223562 event pairs, 1266 based on Foata normal form. 774/20296 useless extension candidates. Maximal degree in co-relation 40204. Up to 10888 conditions per place. [2024-02-05 10:38:12,549 INFO L140 encePairwiseOnDemand]: 117/122 looper letters, 79 selfloop transitions, 2 changer transitions 0/147 dead transitions. [2024-02-05 10:38:12,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 147 transitions, 542 flow [2024-02-05 10:38:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:38:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:38:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 365 transitions. [2024-02-05 10:38:12,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7479508196721312 [2024-02-05 10:38:12,551 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 278 flow. Second operand 4 states and 365 transitions. [2024-02-05 10:38:12,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 147 transitions, 542 flow [2024-02-05 10:38:12,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 147 transitions, 534 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:38:12,556 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 272 flow [2024-02-05 10:38:12,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-02-05 10:38:12,556 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2024-02-05 10:38:12,557 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 272 flow [2024-02-05 10:38:12,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2024-02-05 10:38:12,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:12,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:38:12,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-05 10:38:12,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-05 10:38:12,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:12,558 INFO L85 PathProgramCache]: Analyzing trace with hash 839080429, now seen corresponding path program 1 times [2024-02-05 10:38:12,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:12,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165473961] [2024-02-05 10:38:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:12,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:12,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:12,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165473961] [2024-02-05 10:38:12,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165473961] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:38:12,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:38:12,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:38:12,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881695565] [2024-02-05 10:38:12,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:38:12,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:38:12,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:38:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:38:12,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 122 [2024-02-05 10:38:12,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 272 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) [2024-02-05 10:38:12,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:12,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 122 [2024-02-05 10:38:12,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:18,235 INFO L124 PetriNetUnfolderBase]: 65263/104997 cut-off events. [2024-02-05 10:38:18,236 INFO L125 PetriNetUnfolderBase]: For 11423/11657 co-relation queries the response was YES. [2024-02-05 10:38:18,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203978 conditions, 104997 events. 65263/104997 cut-off events. For 11423/11657 co-relation queries the response was YES. Maximal size of possible extension queue 3113. Compared 917027 event pairs, 35569 based on Foata normal form. 10056/111189 useless extension candidates. Maximal degree in co-relation 203960. Up to 59310 conditions per place. [2024-02-05 10:38:18,955 INFO L140 encePairwiseOnDemand]: 91/122 looper letters, 99 selfloop transitions, 19 changer transitions 0/149 dead transitions. [2024-02-05 10:38:18,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 149 transitions, 606 flow [2024-02-05 10:38:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:38:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:38:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 296 transitions. [2024-02-05 10:38:18,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6065573770491803 [2024-02-05 10:38:18,958 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 272 flow. Second operand 4 states and 296 transitions. [2024-02-05 10:38:18,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 149 transitions, 606 flow [2024-02-05 10:38:18,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 149 transitions, 601 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:38:18,966 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 404 flow [2024-02-05 10:38:18,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-02-05 10:38:18,967 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -15 predicate places. [2024-02-05 10:38:18,967 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 404 flow [2024-02-05 10:38:18,967 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) [2024-02-05 10:38:18,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:18,967 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-02-05 10:38:18,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:38:18,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 46 more)] === [2024-02-05 10:38:18,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash 3922440, now seen corresponding path program 1 times [2024-02-05 10:38:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:18,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137630265] [2024-02-05 10:38:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:18,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:38:18,986 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-05 10:38:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-05 10:38:18,996 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-05 10:38:18,996 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-05 10:38:18,996 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2024-02-05 10:38:18,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (47 of 49 remaining) [2024-02-05 10:38:18,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (46 of 49 remaining) [2024-02-05 10:38:18,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (45 of 49 remaining) [2024-02-05 10:38:18,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (44 of 49 remaining) [2024-02-05 10:38:18,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (43 of 49 remaining) [2024-02-05 10:38:18,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (42 of 49 remaining) [2024-02-05 10:38:18,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (41 of 49 remaining) [2024-02-05 10:38:18,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 49 remaining) [2024-02-05 10:38:18,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 49 remaining) [2024-02-05 10:38:18,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 49 remaining) [2024-02-05 10:38:18,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 49 remaining) [2024-02-05 10:38:18,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (36 of 49 remaining) [2024-02-05 10:38:18,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 49 remaining) [2024-02-05 10:38:18,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 49 remaining) [2024-02-05 10:38:18,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 49 remaining) [2024-02-05 10:38:18,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 49 remaining) [2024-02-05 10:38:18,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 49 remaining) [2024-02-05 10:38:18,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 49 remaining) [2024-02-05 10:38:18,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 49 remaining) [2024-02-05 10:38:18,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 49 remaining) [2024-02-05 10:38:18,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 49 remaining) [2024-02-05 10:38:18,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 49 remaining) [2024-02-05 10:38:19,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 49 remaining) [2024-02-05 10:38:19,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (24 of 49 remaining) [2024-02-05 10:38:19,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 49 remaining) [2024-02-05 10:38:19,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 49 remaining) [2024-02-05 10:38:19,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 49 remaining) [2024-02-05 10:38:19,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 49 remaining) [2024-02-05 10:38:19,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 49 remaining) [2024-02-05 10:38:19,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 49 remaining) [2024-02-05 10:38:19,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 49 remaining) [2024-02-05 10:38:19,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 49 remaining) [2024-02-05 10:38:19,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 49 remaining) [2024-02-05 10:38:19,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 49 remaining) [2024-02-05 10:38:19,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 49 remaining) [2024-02-05 10:38:19,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (12 of 49 remaining) [2024-02-05 10:38:19,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 49 remaining) [2024-02-05 10:38:19,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 49 remaining) [2024-02-05 10:38:19,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 49 remaining) [2024-02-05 10:38:19,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 49 remaining) [2024-02-05 10:38:19,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 49 remaining) [2024-02-05 10:38:19,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 49 remaining) [2024-02-05 10:38:19,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 49 remaining) [2024-02-05 10:38:19,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 49 remaining) [2024-02-05 10:38:19,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 49 remaining) [2024-02-05 10:38:19,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 49 remaining) [2024-02-05 10:38:19,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 49 remaining) [2024-02-05 10:38:19,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONERROR_FUNCTION (0 of 49 remaining) [2024-02-05 10:38:19,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-05 10:38:19,003 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-02-05 10:38:19,004 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-05 10:38:19,004 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-05 10:38:19,037 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-05 10:38:19,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 161 transitions, 350 flow [2024-02-05 10:38:19,051 INFO L124 PetriNetUnfolderBase]: 16/172 cut-off events. [2024-02-05 10:38:19,052 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-05 10:38:19,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 172 events. 16/172 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 750 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 155. Up to 5 conditions per place. [2024-02-05 10:38:19,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 161 transitions, 350 flow [2024-02-05 10:38:19,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 161 transitions, 350 flow [2024-02-05 10:38:19,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:38:19,057 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;@2bbc5471, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:38:19,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-02-05 10:38:19,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:38:19,058 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-05 10:38:19,058 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:38:19,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:19,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:38:19,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 58 more)] === [2024-02-05 10:38:19,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash 585982510, now seen corresponding path program 1 times [2024-02-05 10:38:19,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:19,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386055212] [2024-02-05 10:38:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:19,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:19,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386055212] [2024-02-05 10:38:19,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386055212] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:38:19,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:38:19,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:38:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901535577] [2024-02-05 10:38:19,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:38:19,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:38:19,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:38:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:38:19,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 161 [2024-02-05 10:38:19,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 161 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 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) [2024-02-05 10:38:19,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:19,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 161 [2024-02-05 10:38:19,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand