./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c --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/bench-exp2x3.wvr.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/weaver/bench-exp2x3.wvr.c ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/bench-exp2x3.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-d8006e4-m [2024-02-05 10:31:40,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:31:40,360 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:31:40,364 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:31:40,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:31:40,389 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:31:40,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:31:40,389 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:31:40,390 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:31:40,396 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:31:40,396 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:31:40,396 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:31:40,397 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:31:40,397 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:31:40,397 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:31:40,397 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:31:40,397 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:31:40,397 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:31:40,398 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:31:40,398 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:31:40,398 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:31:40,404 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:31:40,404 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:31:40,404 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:31:40,405 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:31:40,405 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:31:40,405 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:31:40,405 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:31:40,406 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:31:40,406 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:31:40,407 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:31:40,407 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:31:40,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:31:40,407 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:31:40,407 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:31:40,408 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:31:40,408 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:31:40,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:31:40,408 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:31:40,408 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:31:40,408 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:31:40,409 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:31:40,409 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:31:40,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:31:40,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:31:40,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:31:40,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:31:40,638 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:31:40,638 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:31:40,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c [2024-02-05 10:31:41,672 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:31:41,838 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:31:41,838 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c [2024-02-05 10:31:41,844 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18d8757f7/9f9218e8e8d94137b045aaab70044c5d/FLAGed7639af9 [2024-02-05 10:31:41,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18d8757f7/9f9218e8e8d94137b045aaab70044c5d [2024-02-05 10:31:41,855 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:31:41,856 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:31:41,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/bench-exp2x3.wvr.yml/witness.yml [2024-02-05 10:31:41,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:31:41,948 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:31:41,950 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:31:41,950 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:31:41,953 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:31:41,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:31:41" (1/2) ... [2024-02-05 10:31:41,955 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3113e4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:31:41, skipping insertion in model container [2024-02-05 10:31:41,955 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:31:41" (1/2) ... [2024-02-05 10:31:41,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@411f6217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:31:41, skipping insertion in model container [2024-02-05 10:31:41,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:31:41" (2/2) ... [2024-02-05 10:31:41,957 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3113e4c0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:41, skipping insertion in model container [2024-02-05 10:31:41,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:31:41" (2/2) ... [2024-02-05 10:31:41,957 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:31:41,982 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:31:41,983 INFO L101 nessWitnessExtractor]: Loop invariant at [L54-L54] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,983 INFO L101 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,984 INFO L101 nessWitnessExtractor]: Location invariant before [L66-L66] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,984 INFO L101 nessWitnessExtractor]: Location invariant before [L75-L75] ((x3 == 0U) && (x4 == 0U)) && (n == 0U) [2024-02-05 10:31:41,984 INFO L101 nessWitnessExtractor]: Loop invariant at [L46-L46] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,984 INFO L101 nessWitnessExtractor]: Loop invariant at [L62-L62] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,985 INFO L101 nessWitnessExtractor]: Location invariant before [L74-L74] (((x2 == 0U) && (x3 == 0U)) && (x4 == 0U)) && (n == 0U) [2024-02-05 10:31:41,985 INFO L101 nessWitnessExtractor]: Loop invariant at [L38-L38] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,985 INFO L101 nessWitnessExtractor]: Location invariant before [L58-L58] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,985 INFO L101 nessWitnessExtractor]: Location invariant before [L39-L39] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,985 INFO L101 nessWitnessExtractor]: Location invariant before [L50-L50] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,985 INFO L101 nessWitnessExtractor]: Location invariant before [L47-L47] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,985 INFO L101 nessWitnessExtractor]: Location invariant before [L55-L55] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,986 INFO L101 nessWitnessExtractor]: Location invariant before [L76-L76] (x4 == 0U) && (n == 0U) [2024-02-05 10:31:41,986 INFO L101 nessWitnessExtractor]: Location invariant before [L63-L63] (unsigned long )_argptr == 0UL [2024-02-05 10:31:41,986 INFO L101 nessWitnessExtractor]: Location invariant before [L73-L73] (((((((((0LL - (long long )n) + (long long )x1 >= 0LL) && ((long long )n + (long long )x1 >= 0LL)) && ((0LL - (long long )n) - (long long )x1 >= 0LL)) && ((long long )n - (long long )x1 >= 0LL)) && (x1 == 0U)) && (x2 == 0U)) && (x3 == 0U)) && (x4 == 0U)) && (n == 0U) [2024-02-05 10:31:41,986 INFO L101 nessWitnessExtractor]: Location invariant before [L77-L77] n == 0U [2024-02-05 10:31:42,004 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:31:42,128 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c[2289,2302] [2024-02-05 10:31:42,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:31:42,137 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 Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:31:42,184 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c[2289,2302] [2024-02-05 10:31:42,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:31:42,196 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:31:42,196 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42 WrapperNode [2024-02-05 10:31:42,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:31:42,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:31:42,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:31:42,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:31:42,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,224 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,247 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 100 [2024-02-05 10:31:42,247 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:31:42,248 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:31:42,248 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:31:42,248 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:31:42,255 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,259 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,280 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-05 10:31:42,281 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,281 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,292 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,295 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,296 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,297 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,299 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:31:42,299 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:31:42,300 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:31:42,300 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:31:42,301 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (1/1) ... [2024-02-05 10:31:42,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:31:42,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:31:42,334 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 10:31:42,353 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 10:31:42,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:31:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-05 10:31:42,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-05 10:31:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-05 10:31:42,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-05 10:31:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-05 10:31:42,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-05 10:31:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-05 10:31:42,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-05 10:31:42,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:31:42,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:31:42,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:31:42,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-05 10:31:42,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-05 10:31:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:31:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:31:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:31:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:31:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-05 10:31:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-05 10:31:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:31:42,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:31:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-05 10:31:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-05 10:31:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-05 10:31:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-05 10:31:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-05 10:31:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:31:42,375 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 10:31:42,489 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:31:42,491 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:31:42,723 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:31:42,724 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:31:42,870 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:31:42,871 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-05 10:31:42,871 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:31:42 BoogieIcfgContainer [2024-02-05 10:31:42,871 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:31:42,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:31:42,877 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:31:42,880 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:31:42,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:31:41" (1/4) ... [2024-02-05 10:31:42,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ffadd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:31:42, skipping insertion in model container [2024-02-05 10:31:42,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:31:41" (2/4) ... [2024-02-05 10:31:42,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ffadd6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:31:42, skipping insertion in model container [2024-02-05 10:31:42,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:31:42" (3/4) ... [2024-02-05 10:31:42,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ffadd6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:31:42, skipping insertion in model container [2024-02-05 10:31:42,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:31:42" (4/4) ... [2024-02-05 10:31:42,882 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2024-02-05 10:31:42,895 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:31:42,895 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-02-05 10:31:42,895 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:31:42,978 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-05 10:31:43,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 73 transitions, 174 flow [2024-02-05 10:31:43,053 INFO L124 PetriNetUnfolderBase]: 8/69 cut-off events. [2024-02-05 10:31:43,053 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-05 10:31:43,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 69 events. 8/69 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 138 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-02-05 10:31:43,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 73 transitions, 174 flow [2024-02-05 10:31:43,061 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 68 transitions, 160 flow [2024-02-05 10:31:43,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:31:43,082 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;@5dfc3695, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:31:43,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-02-05 10:31:43,086 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:31:43,086 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:31:43,087 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:31:43,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:43,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:31:43,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:43,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:43,093 INFO L85 PathProgramCache]: Analyzing trace with hash 11415, now seen corresponding path program 1 times [2024-02-05 10:31:43,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:43,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134069159] [2024-02-05 10:31:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:43,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:43,532 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 10:31:43,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:43,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134069159] [2024-02-05 10:31:43,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134069159] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:43,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:43,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:31:43,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761529671] [2024-02-05 10:31:43,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:43,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:31:43,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:31:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:31:43,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 73 [2024-02-05 10:31:43,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 10:31:43,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:43,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 73 [2024-02-05 10:31:43,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:44,220 INFO L124 PetriNetUnfolderBase]: 3119/5228 cut-off events. [2024-02-05 10:31:44,221 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-02-05 10:31:44,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9404 conditions, 5228 events. 3119/5228 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36105 event pairs, 1757 based on Foata normal form. 1329/5921 useless extension candidates. Maximal degree in co-relation 7808. Up to 3915 conditions per place. [2024-02-05 10:31:44,261 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 36 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-02-05 10:31:44,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 63 transitions, 226 flow [2024-02-05 10:31:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:31:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:31:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-02-05 10:31:44,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593607305936073 [2024-02-05 10:31:44,273 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 160 flow. Second operand 3 states and 130 transitions. [2024-02-05 10:31:44,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 63 transitions, 226 flow [2024-02-05 10:31:44,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 63 transitions, 210 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-02-05 10:31:44,289 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 138 flow [2024-02-05 10:31:44,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-02-05 10:31:44,293 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2024-02-05 10:31:44,294 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 138 flow [2024-02-05 10:31:44,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 10:31:44,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:44,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-05 10:31:44,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:31:44,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:44,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash 354197, now seen corresponding path program 1 times [2024-02-05 10:31:44,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:44,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686095314] [2024-02-05 10:31:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:44,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:44,378 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 10:31:44,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:44,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686095314] [2024-02-05 10:31:44,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686095314] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:44,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:44,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:31:44,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668193045] [2024-02-05 10:31:44,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:44,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:31:44,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:44,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:31:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:31:44,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 73 [2024-02-05 10:31:44,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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 10:31:44,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:44,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 73 [2024-02-05 10:31:44,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:44,825 INFO L124 PetriNetUnfolderBase]: 3119/5227 cut-off events. [2024-02-05 10:31:44,825 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-02-05 10:31:44,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 5227 events. 3119/5227 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 35964 event pairs, 1757 based on Foata normal form. 0/4592 useless extension candidates. Maximal degree in co-relation 9222. Up to 3913 conditions per place. [2024-02-05 10:31:44,860 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 35 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2024-02-05 10:31:44,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 210 flow [2024-02-05 10:31:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:31:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:31:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-02-05 10:31:44,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844748858447488 [2024-02-05 10:31:44,863 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 138 flow. Second operand 3 states and 128 transitions. [2024-02-05 10:31:44,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 210 flow [2024-02-05 10:31:44,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:31:44,865 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 136 flow [2024-02-05 10:31:44,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-02-05 10:31:44,866 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -8 predicate places. [2024-02-05 10:31:44,866 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 136 flow [2024-02-05 10:31:44,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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 10:31:44,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:44,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-05 10:31:44,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:31:44,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:44,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash 10980490, now seen corresponding path program 1 times [2024-02-05 10:31:44,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:44,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25033156] [2024-02-05 10:31:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:44,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:44,921 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 10:31:44,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:44,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25033156] [2024-02-05 10:31:44,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25033156] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:44,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:44,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:31:44,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166952784] [2024-02-05 10:31:44,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:44,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:31:44,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:31:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:31:44,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 73 [2024-02-05 10:31:44,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 10:31:44,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:44,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 73 [2024-02-05 10:31:44,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:45,330 INFO L124 PetriNetUnfolderBase]: 3119/5226 cut-off events. [2024-02-05 10:31:45,330 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-02-05 10:31:45,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9229 conditions, 5226 events. 3119/5226 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36057 event pairs, 1757 based on Foata normal form. 0/4592 useless extension candidates. Maximal degree in co-relation 9218. Up to 3911 conditions per place. [2024-02-05 10:31:45,357 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 34 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-02-05 10:31:45,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 206 flow [2024-02-05 10:31:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:31:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:31:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-02-05 10:31:45,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593607305936073 [2024-02-05 10:31:45,359 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 136 flow. Second operand 3 states and 130 transitions. [2024-02-05 10:31:45,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 206 flow [2024-02-05 10:31:45,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:31:45,360 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 134 flow [2024-02-05 10:31:45,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-02-05 10:31:45,361 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2024-02-05 10:31:45,361 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 134 flow [2024-02-05 10:31:45,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 10:31:45,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:45,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:31:45,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:31:45,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:45,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:45,363 INFO L85 PathProgramCache]: Analyzing trace with hash 340395585, now seen corresponding path program 1 times [2024-02-05 10:31:45,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:45,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285809393] [2024-02-05 10:31:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:45,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:45,405 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 10:31:45,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:45,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285809393] [2024-02-05 10:31:45,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285809393] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:45,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:45,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:31:45,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164697770] [2024-02-05 10:31:45,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:45,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:31:45,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:45,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:31:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:31:45,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 73 [2024-02-05 10:31:45,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:31:45,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:45,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 73 [2024-02-05 10:31:45,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:45,793 INFO L124 PetriNetUnfolderBase]: 3119/5225 cut-off events. [2024-02-05 10:31:45,793 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-02-05 10:31:45,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9227 conditions, 5225 events. 3119/5225 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36026 event pairs, 1757 based on Foata normal form. 0/4592 useless extension candidates. Maximal degree in co-relation 9214. Up to 3909 conditions per place. [2024-02-05 10:31:45,826 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 33 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-05 10:31:45,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 202 flow [2024-02-05 10:31:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:31:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:31:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 132 transitions. [2024-02-05 10:31:45,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027397260273972 [2024-02-05 10:31:45,829 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 134 flow. Second operand 3 states and 132 transitions. [2024-02-05 10:31:45,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 202 flow [2024-02-05 10:31:45,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:31:45,831 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 132 flow [2024-02-05 10:31:45,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-02-05 10:31:45,833 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2024-02-05 10:31:45,833 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 132 flow [2024-02-05 10:31:45,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:31:45,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:45,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-05 10:31:45,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:31:45,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:45,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:45,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1962328882, now seen corresponding path program 1 times [2024-02-05 10:31:45,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:45,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406536381] [2024-02-05 10:31:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:45,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:45,888 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 10:31:45,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:45,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406536381] [2024-02-05 10:31:45,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406536381] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:45,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:45,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:31:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304988016] [2024-02-05 10:31:45,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:45,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:31:45,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:31:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:31:45,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 73 [2024-02-05 10:31:45,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 10:31:45,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:45,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 73 [2024-02-05 10:31:45,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:46,166 INFO L124 PetriNetUnfolderBase]: 3119/5224 cut-off events. [2024-02-05 10:31:46,166 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-02-05 10:31:46,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9225 conditions, 5224 events. 3119/5224 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36028 event pairs, 1757 based on Foata normal form. 0/4592 useless extension candidates. Maximal degree in co-relation 9210. Up to 3907 conditions per place. [2024-02-05 10:31:46,198 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 32 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-02-05 10:31:46,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 198 flow [2024-02-05 10:31:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:31:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:31:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2024-02-05 10:31:46,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118721461187214 [2024-02-05 10:31:46,200 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 132 flow. Second operand 3 states and 134 transitions. [2024-02-05 10:31:46,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 198 flow [2024-02-05 10:31:46,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 59 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:31:46,201 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 130 flow [2024-02-05 10:31:46,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-02-05 10:31:46,204 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -11 predicate places. [2024-02-05 10:31:46,204 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 130 flow [2024-02-05 10:31:46,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 10:31:46,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:46,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:46,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:31:46,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:46,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash 940290437, now seen corresponding path program 1 times [2024-02-05 10:31:46,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:46,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054388529] [2024-02-05 10:31:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:46,281 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 10:31:46,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:46,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054388529] [2024-02-05 10:31:46,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054388529] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:46,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:46,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:31:46,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586072003] [2024-02-05 10:31:46,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:46,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:46,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:46,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:46,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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 10:31:46,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:46,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:46,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:46,442 INFO L124 PetriNetUnfolderBase]: 1181/2120 cut-off events. [2024-02-05 10:31:46,442 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-02-05 10:31:46,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3659 conditions, 2120 events. 1181/2120 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12605 event pairs, 419 based on Foata normal form. 80/1906 useless extension candidates. Maximal degree in co-relation 3642. Up to 1229 conditions per place. [2024-02-05 10:31:46,455 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 42 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-02-05 10:31:46,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 241 flow [2024-02-05 10:31:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:31:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:31:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2024-02-05 10:31:46,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6267123287671232 [2024-02-05 10:31:46,456 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 130 flow. Second operand 4 states and 183 transitions. [2024-02-05 10:31:46,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 241 flow [2024-02-05 10:31:46,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 237 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:31:46,458 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 124 flow [2024-02-05 10:31:46,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-02-05 10:31:46,460 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -13 predicate places. [2024-02-05 10:31:46,461 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 124 flow [2024-02-05 10:31:46,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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 10:31:46,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:46,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:46,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:31:46,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:46,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1674751101, now seen corresponding path program 1 times [2024-02-05 10:31:46,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:46,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055639639] [2024-02-05 10:31:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:46,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:46,538 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 10:31:46,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:46,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055639639] [2024-02-05 10:31:46,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055639639] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:46,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:46,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:31:46,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998740342] [2024-02-05 10:31:46,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:46,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:46,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:46,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:46,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:46,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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 10:31:46,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:46,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:46,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:46,688 INFO L124 PetriNetUnfolderBase]: 1166/2042 cut-off events. [2024-02-05 10:31:46,688 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-02-05 10:31:46,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3566 conditions, 2042 events. 1166/2042 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12460 event pairs, 121 based on Foata normal form. 96/1841 useless extension candidates. Maximal degree in co-relation 3545. Up to 1136 conditions per place. [2024-02-05 10:31:46,698 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 44 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-02-05 10:31:46,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 243 flow [2024-02-05 10:31:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:31:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:31:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 185 transitions. [2024-02-05 10:31:46,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335616438356164 [2024-02-05 10:31:46,700 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 124 flow. Second operand 4 states and 185 transitions. [2024-02-05 10:31:46,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 243 flow [2024-02-05 10:31:46,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:31:46,704 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 119 flow [2024-02-05 10:31:46,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-02-05 10:31:46,705 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -15 predicate places. [2024-02-05 10:31:46,705 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 119 flow [2024-02-05 10:31:46,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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 10:31:46,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:46,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:46,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:31:46,706 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:46,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:46,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1177298064, now seen corresponding path program 1 times [2024-02-05 10:31:46,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:46,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106591849] [2024-02-05 10:31:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:46,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:46,779 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 10:31:46,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:46,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106591849] [2024-02-05 10:31:46,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106591849] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:46,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:46,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:31:46,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551608296] [2024-02-05 10:31:46,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:46,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:46,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:46,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:46,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 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 10:31:46,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:46,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:46,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:46,942 INFO L124 PetriNetUnfolderBase]: 1169/2081 cut-off events. [2024-02-05 10:31:46,943 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-05 10:31:46,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3613 conditions, 2081 events. 1169/2081 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12250 event pairs, 143 based on Foata normal form. 96/1898 useless extension candidates. Maximal degree in co-relation 3593. Up to 1073 conditions per place. [2024-02-05 10:31:46,950 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 46 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-02-05 10:31:46,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 246 flow [2024-02-05 10:31:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:31:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:31:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 187 transitions. [2024-02-05 10:31:46,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6404109589041096 [2024-02-05 10:31:46,951 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 119 flow. Second operand 4 states and 187 transitions. [2024-02-05 10:31:46,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 246 flow [2024-02-05 10:31:46,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:31:46,953 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 114 flow [2024-02-05 10:31:46,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-02-05 10:31:46,953 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -17 predicate places. [2024-02-05 10:31:46,953 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 114 flow [2024-02-05 10:31:46,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 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 10:31:46,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:46,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:46,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:31:46,954 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:46,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1808049526, now seen corresponding path program 1 times [2024-02-05 10:31:46,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:46,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139943489] [2024-02-05 10:31:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:46,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:47,021 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 10:31:47,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:47,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139943489] [2024-02-05 10:31:47,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139943489] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:47,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:47,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:31:47,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198334984] [2024-02-05 10:31:47,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:47,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:47,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:47,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:47,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:47,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:47,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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 10:31:47,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:47,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:47,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:47,171 INFO L124 PetriNetUnfolderBase]: 1194/1866 cut-off events. [2024-02-05 10:31:47,171 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-02-05 10:31:47,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3438 conditions, 1866 events. 1194/1866 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9688 event pairs, 117 based on Foata normal form. 80/1749 useless extension candidates. Maximal degree in co-relation 3418. Up to 892 conditions per place. [2024-02-05 10:31:47,178 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 48 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2024-02-05 10:31:47,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 249 flow [2024-02-05 10:31:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:31:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:31:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2024-02-05 10:31:47,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472602739726028 [2024-02-05 10:31:47,180 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 114 flow. Second operand 4 states and 189 transitions. [2024-02-05 10:31:47,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 249 flow [2024-02-05 10:31:47,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:31:47,181 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 109 flow [2024-02-05 10:31:47,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-02-05 10:31:47,183 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -19 predicate places. [2024-02-05 10:31:47,183 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 109 flow [2024-02-05 10:31:47,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 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 10:31:47,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:47,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:47,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:31:47,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:47,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:47,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2086548613, now seen corresponding path program 1 times [2024-02-05 10:31:47,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:47,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033582629] [2024-02-05 10:31:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:47,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:47,341 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 10:31:47,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033582629] [2024-02-05 10:31:47,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033582629] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:47,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:47,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:31:47,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628480044] [2024-02-05 10:31:47,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:47,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:31:47,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:47,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:31:47,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:31:47,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 73 [2024-02-05 10:31:47,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 10:31:47,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:47,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 73 [2024-02-05 10:31:47,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:47,560 INFO L124 PetriNetUnfolderBase]: 1537/2695 cut-off events. [2024-02-05 10:31:47,560 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-02-05 10:31:47,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4742 conditions, 2695 events. 1537/2695 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16380 event pairs, 141 based on Foata normal form. 1/2389 useless extension candidates. Maximal degree in co-relation 4722. Up to 1737 conditions per place. [2024-02-05 10:31:47,569 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 44 selfloop transitions, 7 changer transitions 1/69 dead transitions. [2024-02-05 10:31:47,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 266 flow [2024-02-05 10:31:47,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:31:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:31:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-02-05 10:31:47,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7625570776255708 [2024-02-05 10:31:47,571 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 109 flow. Second operand 3 states and 167 transitions. [2024-02-05 10:31:47,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 266 flow [2024-02-05 10:31:47,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 261 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:31:47,572 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 145 flow [2024-02-05 10:31:47,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-02-05 10:31:47,573 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -18 predicate places. [2024-02-05 10:31:47,573 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 145 flow [2024-02-05 10:31:47,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 10:31:47,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:47,574 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:47,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-05 10:31:47,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:47,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:47,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2129419317, now seen corresponding path program 1 times [2024-02-05 10:31:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:47,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425950065] [2024-02-05 10:31:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:47,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:47,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:47,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425950065] [2024-02-05 10:31:47,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425950065] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:47,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:47,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:31:47,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946438104] [2024-02-05 10:31:47,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:47,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:47,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:47,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:47,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:47,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:47,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:47,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:48,203 INFO L124 PetriNetUnfolderBase]: 5247/7687 cut-off events. [2024-02-05 10:31:48,203 INFO L125 PetriNetUnfolderBase]: For 1689/2088 co-relation queries the response was YES. [2024-02-05 10:31:48,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16991 conditions, 7687 events. 5247/7687 cut-off events. For 1689/2088 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 46524 event pairs, 1007 based on Foata normal form. 28/6452 useless extension candidates. Maximal degree in co-relation 16966. Up to 2333 conditions per place. [2024-02-05 10:31:48,245 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 85 selfloop transitions, 15 changer transitions 0/113 dead transitions. [2024-02-05 10:31:48,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 113 transitions, 518 flow [2024-02-05 10:31:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:31:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:31:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-02-05 10:31:48,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7205479452054795 [2024-02-05 10:31:48,247 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 145 flow. Second operand 5 states and 263 transitions. [2024-02-05 10:31:48,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 113 transitions, 518 flow [2024-02-05 10:31:48,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 113 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:31:48,249 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 236 flow [2024-02-05 10:31:48,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-02-05 10:31:48,249 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -12 predicate places. [2024-02-05 10:31:48,249 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 236 flow [2024-02-05 10:31:48,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:48,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:48,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:48,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:31:48,250 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:48,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash -479888405, now seen corresponding path program 2 times [2024-02-05 10:31:48,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:48,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107233621] [2024-02-05 10:31:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:48,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:48,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:48,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107233621] [2024-02-05 10:31:48,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107233621] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:48,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:48,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:31:48,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824813011] [2024-02-05 10:31:48,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:48,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:48,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:48,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:48,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:48,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:48,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:48,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:48,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:48,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:48,785 INFO L124 PetriNetUnfolderBase]: 5085/7537 cut-off events. [2024-02-05 10:31:48,786 INFO L125 PetriNetUnfolderBase]: For 4836/4872 co-relation queries the response was YES. [2024-02-05 10:31:48,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19043 conditions, 7537 events. 5085/7537 cut-off events. For 4836/4872 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 45943 event pairs, 851 based on Foata normal form. 156/7148 useless extension candidates. Maximal degree in co-relation 19011. Up to 2535 conditions per place. [2024-02-05 10:31:48,824 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 91 selfloop transitions, 17 changer transitions 0/121 dead transitions. [2024-02-05 10:31:48,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 121 transitions, 635 flow [2024-02-05 10:31:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:31:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:31:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-02-05 10:31:48,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7287671232876712 [2024-02-05 10:31:48,826 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 236 flow. Second operand 5 states and 266 transitions. [2024-02-05 10:31:48,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 121 transitions, 635 flow [2024-02-05 10:31:48,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 121 transitions, 635 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:31:48,830 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 345 flow [2024-02-05 10:31:48,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-02-05 10:31:48,831 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -4 predicate places. [2024-02-05 10:31:48,831 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 345 flow [2024-02-05 10:31:48,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:48,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:48,832 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:48,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-05 10:31:48,832 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:48,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:48,833 INFO L85 PathProgramCache]: Analyzing trace with hash -38823653, now seen corresponding path program 1 times [2024-02-05 10:31:48,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:48,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280440158] [2024-02-05 10:31:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:48,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:48,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:48,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280440158] [2024-02-05 10:31:48,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280440158] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:48,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:48,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:31:48,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466498684] [2024-02-05 10:31:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:48,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:48,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:48,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:48,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 345 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:48,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:48,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:48,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:49,470 INFO L124 PetriNetUnfolderBase]: 5393/7745 cut-off events. [2024-02-05 10:31:49,470 INFO L125 PetriNetUnfolderBase]: For 13222/13607 co-relation queries the response was YES. [2024-02-05 10:31:49,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22756 conditions, 7745 events. 5393/7745 cut-off events. For 13222/13607 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 45832 event pairs, 559 based on Foata normal form. 123/7394 useless extension candidates. Maximal degree in co-relation 22714. Up to 2909 conditions per place. [2024-02-05 10:31:49,509 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 93 selfloop transitions, 14 changer transitions 0/120 dead transitions. [2024-02-05 10:31:49,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 120 transitions, 741 flow [2024-02-05 10:31:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:31:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:31:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 262 transitions. [2024-02-05 10:31:49,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7178082191780822 [2024-02-05 10:31:49,511 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 345 flow. Second operand 5 states and 262 transitions. [2024-02-05 10:31:49,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 120 transitions, 741 flow [2024-02-05 10:31:49,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 120 transitions, 737 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-05 10:31:49,522 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 432 flow [2024-02-05 10:31:49,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=432, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-02-05 10:31:49,523 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2024-02-05 10:31:49,524 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 432 flow [2024-02-05 10:31:49,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:49,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:49,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:49,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-05 10:31:49,525 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:49,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash -303524965, now seen corresponding path program 2 times [2024-02-05 10:31:49,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:49,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599426891] [2024-02-05 10:31:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:49,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:49,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:49,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599426891] [2024-02-05 10:31:49,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599426891] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:49,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:49,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:31:49,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301155949] [2024-02-05 10:31:49,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:49,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:49,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:49,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:49,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:49,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:49,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:49,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:50,161 INFO L124 PetriNetUnfolderBase]: 5105/7451 cut-off events. [2024-02-05 10:31:50,161 INFO L125 PetriNetUnfolderBase]: For 16006/16077 co-relation queries the response was YES. [2024-02-05 10:31:50,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22774 conditions, 7451 events. 5105/7451 cut-off events. For 16006/16077 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 45069 event pairs, 1295 based on Foata normal form. 138/7030 useless extension candidates. Maximal degree in co-relation 22723. Up to 3184 conditions per place. [2024-02-05 10:31:50,208 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 96 selfloop transitions, 16 changer transitions 0/125 dead transitions. [2024-02-05 10:31:50,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 125 transitions, 839 flow [2024-02-05 10:31:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:31:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:31:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-02-05 10:31:50,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7205479452054795 [2024-02-05 10:31:50,211 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 432 flow. Second operand 5 states and 263 transitions. [2024-02-05 10:31:50,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 125 transitions, 839 flow [2024-02-05 10:31:50,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 125 transitions, 830 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-02-05 10:31:50,229 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 512 flow [2024-02-05 10:31:50,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2024-02-05 10:31:50,230 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2024-02-05 10:31:50,230 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 512 flow [2024-02-05 10:31:50,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:50,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:50,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:50,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-05 10:31:50,231 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:50,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1085100089, now seen corresponding path program 1 times [2024-02-05 10:31:50,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:50,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686031409] [2024-02-05 10:31:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:50,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:50,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:50,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686031409] [2024-02-05 10:31:50,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686031409] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:31:50,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011917949] [2024-02-05 10:31:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:50,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:31:50,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:31:50,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:31:50,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-05 10:31:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:50,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-05 10:31:50,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:31:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:50,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:31:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:50,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011917949] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:31:50,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:31:50,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-02-05 10:31:50,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697848136] [2024-02-05 10:31:50,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:31:50,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-05 10:31:50,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:50,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-05 10:31:50,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-05 10:31:50,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:50,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 512 flow. Second operand has 6 states, 6 states have (on average 41.5) internal successors, (249), 6 states have internal predecessors, (249), 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 10:31:50,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:50,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:50,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:52,012 INFO L124 PetriNetUnfolderBase]: 11638/16107 cut-off events. [2024-02-05 10:31:52,012 INFO L125 PetriNetUnfolderBase]: For 71748/80842 co-relation queries the response was YES. [2024-02-05 10:31:52,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52941 conditions, 16107 events. 11638/16107 cut-off events. For 71748/80842 co-relation queries the response was YES. Maximal size of possible extension queue 1120. Compared 103761 event pairs, 1216 based on Foata normal form. 1703/15438 useless extension candidates. Maximal degree in co-relation 52883. Up to 5326 conditions per place. [2024-02-05 10:31:52,162 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 178 selfloop transitions, 16 changer transitions 0/221 dead transitions. [2024-02-05 10:31:52,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 221 transitions, 1878 flow [2024-02-05 10:31:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:31:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:31:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 446 transitions. [2024-02-05 10:31:52,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6788432267884322 [2024-02-05 10:31:52,164 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 512 flow. Second operand 9 states and 446 transitions. [2024-02-05 10:31:52,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 221 transitions, 1878 flow [2024-02-05 10:31:52,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 221 transitions, 1841 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-02-05 10:31:52,182 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 609 flow [2024-02-05 10:31:52,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=609, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2024-02-05 10:31:52,184 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 22 predicate places. [2024-02-05 10:31:52,184 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 609 flow [2024-02-05 10:31:52,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.5) internal successors, (249), 6 states have internal predecessors, (249), 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 10:31:52,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:52,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:52,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-05 10:31:52,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-05 10:31:52,400 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:52,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:52,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1289215961, now seen corresponding path program 2 times [2024-02-05 10:31:52,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:52,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18175122] [2024-02-05 10:31:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:52,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:52,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:52,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18175122] [2024-02-05 10:31:52,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18175122] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:52,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:52,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:31:52,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307584251] [2024-02-05 10:31:52,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:52,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:52,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:52,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:52,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:52,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:52,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 609 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:52,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:52,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:52,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:53,682 INFO L124 PetriNetUnfolderBase]: 10215/14068 cut-off events. [2024-02-05 10:31:53,682 INFO L125 PetriNetUnfolderBase]: For 71071/79089 co-relation queries the response was YES. [2024-02-05 10:31:53,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54377 conditions, 14068 events. 10215/14068 cut-off events. For 71071/79089 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 87301 event pairs, 1014 based on Foata normal form. 1636/14859 useless extension candidates. Maximal degree in co-relation 54310. Up to 4753 conditions per place. [2024-02-05 10:31:53,785 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 116 selfloop transitions, 18 changer transitions 0/161 dead transitions. [2024-02-05 10:31:53,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 161 transitions, 1442 flow [2024-02-05 10:31:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:31:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:31:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 258 transitions. [2024-02-05 10:31:53,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7068493150684931 [2024-02-05 10:31:53,787 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 609 flow. Second operand 5 states and 258 transitions. [2024-02-05 10:31:53,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 161 transitions, 1442 flow [2024-02-05 10:31:53,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 161 transitions, 1440 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:31:53,837 INFO L231 Difference]: Finished difference. Result has 101 places, 92 transitions, 753 flow [2024-02-05 10:31:53,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=753, PETRI_PLACES=101, PETRI_TRANSITIONS=92} [2024-02-05 10:31:53,838 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 28 predicate places. [2024-02-05 10:31:53,838 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 92 transitions, 753 flow [2024-02-05 10:31:53,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:53,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:53,839 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:53,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-05 10:31:53,839 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:53,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1973970357, now seen corresponding path program 1 times [2024-02-05 10:31:53,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:53,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604002505] [2024-02-05 10:31:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:53,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:53,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:53,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604002505] [2024-02-05 10:31:53,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604002505] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:53,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:53,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:31:53,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570898443] [2024-02-05 10:31:53,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:53,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:53,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:53,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:53,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 92 transitions, 753 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:53,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:53,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:53,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:55,052 INFO L124 PetriNetUnfolderBase]: 10087/13770 cut-off events. [2024-02-05 10:31:55,052 INFO L125 PetriNetUnfolderBase]: For 82237/90431 co-relation queries the response was YES. [2024-02-05 10:31:55,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57345 conditions, 13770 events. 10087/13770 cut-off events. For 82237/90431 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 83583 event pairs, 938 based on Foata normal form. 1684/14609 useless extension candidates. Maximal degree in co-relation 57270. Up to 6699 conditions per place. [2024-02-05 10:31:55,152 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 122 selfloop transitions, 12 changer transitions 0/161 dead transitions. [2024-02-05 10:31:55,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 161 transitions, 1511 flow [2024-02-05 10:31:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:31:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:31:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-02-05 10:31:55,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7041095890410959 [2024-02-05 10:31:55,154 INFO L175 Difference]: Start difference. First operand has 101 places, 92 transitions, 753 flow. Second operand 5 states and 257 transitions. [2024-02-05 10:31:55,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 161 transitions, 1511 flow [2024-02-05 10:31:55,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1501 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-02-05 10:31:55,251 INFO L231 Difference]: Finished difference. Result has 108 places, 93 transitions, 788 flow [2024-02-05 10:31:55,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=788, PETRI_PLACES=108, PETRI_TRANSITIONS=93} [2024-02-05 10:31:55,252 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 35 predicate places. [2024-02-05 10:31:55,252 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 93 transitions, 788 flow [2024-02-05 10:31:55,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:55,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:55,252 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:55,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-05 10:31:55,253 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:55,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1563603453, now seen corresponding path program 2 times [2024-02-05 10:31:55,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:55,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601023146] [2024-02-05 10:31:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:55,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:55,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:55,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601023146] [2024-02-05 10:31:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601023146] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:31:55,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:31:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:31:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743575210] [2024-02-05 10:31:55,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:31:55,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:31:55,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:31:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:31:55,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:31:55,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 73 [2024-02-05 10:31:55,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 93 transitions, 788 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:55,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:31:55,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 73 [2024-02-05 10:31:55,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:31:56,491 INFO L124 PetriNetUnfolderBase]: 10152/14167 cut-off events. [2024-02-05 10:31:56,492 INFO L125 PetriNetUnfolderBase]: For 91922/100168 co-relation queries the response was YES. [2024-02-05 10:31:56,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60613 conditions, 14167 events. 10152/14167 cut-off events. For 91922/100168 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 90170 event pairs, 1508 based on Foata normal form. 1779/15049 useless extension candidates. Maximal degree in co-relation 60529. Up to 6567 conditions per place. [2024-02-05 10:31:56,595 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 126 selfloop transitions, 16 changer transitions 0/169 dead transitions. [2024-02-05 10:31:56,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 169 transitions, 1633 flow [2024-02-05 10:31:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:31:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:31:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-02-05 10:31:56,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7095890410958904 [2024-02-05 10:31:56,597 INFO L175 Difference]: Start difference. First operand has 108 places, 93 transitions, 788 flow. Second operand 5 states and 259 transitions. [2024-02-05 10:31:56,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 169 transitions, 1633 flow [2024-02-05 10:31:56,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 169 transitions, 1616 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-02-05 10:31:56,723 INFO L231 Difference]: Finished difference. Result has 114 places, 98 transitions, 888 flow [2024-02-05 10:31:56,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=888, PETRI_PLACES=114, PETRI_TRANSITIONS=98} [2024-02-05 10:31:56,724 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 41 predicate places. [2024-02-05 10:31:56,724 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 98 transitions, 888 flow [2024-02-05 10:31:56,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 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 10:31:56,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:31:56,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:31:56,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-05 10:31:56,724 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:31:56,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:31:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1708123933, now seen corresponding path program 1 times [2024-02-05 10:31:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:31:56,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673045758] [2024-02-05 10:31:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:31:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:31:57,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:31:57,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673045758] [2024-02-05 10:31:57,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673045758] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:31:57,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402796299] [2024-02-05 10:31:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:31:57,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:31:57,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:31:57,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:31:57,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-05 10:31:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:31:57,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-05 10:31:57,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:39,807 WARN L293 SmtUtils]: Spent 8.84s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-05 10:34:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:50,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:20,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402796299] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:20,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:20,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2024-02-05 10:35:20,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800503189] [2024-02-05 10:35:20,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:20,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-05 10:35:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:20,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-05 10:35:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=269, Unknown=21, NotChecked=0, Total=380 [2024-02-05 10:35:24,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:35:28,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:35:32,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:35:36,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:35:41,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:35:45,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:35:49,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:35:53,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:35:57,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:01,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:01,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 73 [2024-02-05 10:36:01,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 98 transitions, 888 flow. Second operand has 20 states, 20 states have (on average 29.15) internal successors, (583), 20 states have internal predecessors, (583), 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 10:36:01,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:01,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 73 [2024-02-05 10:36:01,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:22,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:26,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:29,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:32,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:35,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:36,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:38,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:43,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:47,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:49,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:59,587 WARN L293 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 37 DAG size of output: 34 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-05 10:37:04,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:37:20,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:37:22,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-05 10:37:24,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:37:31,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:37:35,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:37:36,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:37:43,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:37:51,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:37:53,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-05 10:37:58,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:38:06,911 INFO L124 PetriNetUnfolderBase]: 43347/59817 cut-off events. [2024-02-05 10:38:06,912 INFO L125 PetriNetUnfolderBase]: For 416787/416868 co-relation queries the response was YES. [2024-02-05 10:38:07,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289614 conditions, 59817 events. 43347/59817 cut-off events. For 416787/416868 co-relation queries the response was YES. Maximal size of possible extension queue 2906. Compared 405245 event pairs, 3453 based on Foata normal form. 148/59878 useless extension candidates. Maximal degree in co-relation 289523. Up to 27482 conditions per place. [2024-02-05 10:38:07,443 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 513 selfloop transitions, 194 changer transitions 19/735 dead transitions. [2024-02-05 10:38:07,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 735 transitions, 7462 flow [2024-02-05 10:38:07,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-05 10:38:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-05 10:38:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 998 transitions. [2024-02-05 10:38:07,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214196762141968 [2024-02-05 10:38:07,455 INFO L175 Difference]: Start difference. First operand has 114 places, 98 transitions, 888 flow. Second operand 22 states and 998 transitions. [2024-02-05 10:38:07,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 735 transitions, 7462 flow [2024-02-05 10:38:08,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 735 transitions, 7361 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-02-05 10:38:08,525 INFO L231 Difference]: Finished difference. Result has 144 places, 288 transitions, 3955 flow [2024-02-05 10:38:08,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3955, PETRI_PLACES=144, PETRI_TRANSITIONS=288} [2024-02-05 10:38:08,525 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 71 predicate places. [2024-02-05 10:38:08,526 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 288 transitions, 3955 flow [2024-02-05 10:38:08,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.15) internal successors, (583), 20 states have internal predecessors, (583), 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 10:38:08,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:08,526 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:38:08,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-05 10:38:08,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:38:08,739 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:38:08,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash -735036515, now seen corresponding path program 2 times [2024-02-05 10:38:08,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:08,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234821890] [2024-02-05 10:38:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:08,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:09,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234821890] [2024-02-05 10:38:09,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234821890] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:38:09,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281659131] [2024-02-05 10:38:09,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:38:09,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:38:09,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:38:09,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:38:09,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-05 10:38:09,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:38:09,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:38:09,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-05 10:38:09,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:38:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:13,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:38:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:14,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281659131] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:38:14,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:38:14,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-02-05 10:38:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172294172] [2024-02-05 10:38:14,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:38:14,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-05 10:38:14,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-05 10:38:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-02-05 10:38:16,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 73 [2024-02-05 10:38:16,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 288 transitions, 3955 flow. Second operand has 19 states, 19 states have (on average 36.36842105263158) internal successors, (691), 19 states have internal predecessors, (691), 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 10:38:16,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:16,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 73 [2024-02-05 10:38:16,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:29,002 INFO L124 PetriNetUnfolderBase]: 44420/62997 cut-off events. [2024-02-05 10:38:29,003 INFO L125 PetriNetUnfolderBase]: For 645360/662013 co-relation queries the response was YES. [2024-02-05 10:38:29,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344844 conditions, 62997 events. 44420/62997 cut-off events. For 645360/662013 co-relation queries the response was YES. Maximal size of possible extension queue 3211. Compared 454216 event pairs, 3370 based on Foata normal form. 2508/63577 useless extension candidates. Maximal degree in co-relation 344739. Up to 30739 conditions per place. [2024-02-05 10:38:29,833 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 515 selfloop transitions, 427 changer transitions 19/980 dead transitions. [2024-02-05 10:38:29,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 980 transitions, 13040 flow [2024-02-05 10:38:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-05 10:38:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-05 10:38:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1223 transitions. [2024-02-05 10:38:29,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6980593607305936 [2024-02-05 10:38:29,838 INFO L175 Difference]: Start difference. First operand has 144 places, 288 transitions, 3955 flow. Second operand 24 states and 1223 transitions. [2024-02-05 10:38:29,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 980 transitions, 13040 flow [2024-02-05 10:38:33,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 980 transitions, 12251 flow, removed 389 selfloop flow, removed 2 redundant places. [2024-02-05 10:38:33,298 INFO L231 Difference]: Finished difference. Result has 176 places, 602 transitions, 9967 flow [2024-02-05 10:38:33,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=3594, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=9967, PETRI_PLACES=176, PETRI_TRANSITIONS=602} [2024-02-05 10:38:33,298 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 103 predicate places. [2024-02-05 10:38:33,299 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 602 transitions, 9967 flow [2024-02-05 10:38:33,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 36.36842105263158) internal successors, (691), 19 states have internal predecessors, (691), 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 10:38:33,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:33,299 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:38:33,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-05 10:38:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:38:33,511 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:38:33,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash 954494525, now seen corresponding path program 1 times [2024-02-05 10:38:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380230999] [2024-02-05 10:38:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:33,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:33,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380230999] [2024-02-05 10:38:33,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380230999] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:38:33,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244643680] [2024-02-05 10:38:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:33,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:38:33,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:38:33,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:38:33,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-05 10:38:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:34,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-05 10:38:34,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:39:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:39:01,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:39:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:39:02,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244643680] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:39:02,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:39:02,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-02-05 10:39:02,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831698967] [2024-02-05 10:39:02,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:39:02,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-05 10:39:02,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:39:02,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-05 10:39:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=243, Unknown=3, NotChecked=0, Total=342 [2024-02-05 10:39:07,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:39:13,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:39:15,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:39:16,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:39:20,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:39:23,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:39:27,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:39:27,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 73 [2024-02-05 10:39:27,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 602 transitions, 9967 flow. Second operand has 19 states, 19 states have (on average 29.57894736842105) internal successors, (562), 19 states have internal predecessors, (562), 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 10:39:27,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:39:27,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 73 [2024-02-05 10:39:27,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:39:42,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:40:07,638 INFO L124 PetriNetUnfolderBase]: 114224/156395 cut-off events. [2024-02-05 10:40:07,638 INFO L125 PetriNetUnfolderBase]: For 2210211/2210220 co-relation queries the response was YES. [2024-02-05 10:40:09,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979380 conditions, 156395 events. 114224/156395 cut-off events. For 2210211/2210220 co-relation queries the response was YES. Maximal size of possible extension queue 8065. Compared 1136406 event pairs, 10195 based on Foata normal form. 94/156349 useless extension candidates. Maximal degree in co-relation 979261. Up to 96245 conditions per place. [2024-02-05 10:40:10,687 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 1307 selfloop transitions, 1408 changer transitions 29/2753 dead transitions. [2024-02-05 10:40:10,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 2753 transitions, 48870 flow [2024-02-05 10:40:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-05 10:40:10,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-05 10:40:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1026 transitions. [2024-02-05 10:40:10,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6110780226325193 [2024-02-05 10:40:10,690 INFO L175 Difference]: Start difference. First operand has 176 places, 602 transitions, 9967 flow. Second operand 23 states and 1026 transitions. [2024-02-05 10:40:10,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 2753 transitions, 48870 flow