./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-11.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_safe-11.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-11.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_safe-11.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:21:06,183 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:21:06,230 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:21:06,238 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:21:06,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:21:06,276 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:21:06,277 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:21:06,277 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:21:06,278 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:21:06,278 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:21:06,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:21:06,279 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:21:06,279 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:21:06,280 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:21:06,280 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:21:06,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:21:06,281 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:21:06,281 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:21:06,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:21:06,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:21:06,282 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:21:06,283 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:21:06,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:21:06,284 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:21:06,284 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:21:06,285 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:21:06,285 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:21:06,285 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:21:06,286 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:21:06,286 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:21:06,286 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:21:06,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:21:06,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:21:06,287 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:21:06,287 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:21:06,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:21:06,287 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:21:06,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:21:06,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:21:06,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:21:06,288 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:21:06,289 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:21:06,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:21:06,289 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:21:06,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:21:06,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:21:06,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:21:06,532 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:21:06,533 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:21:06,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_safe-11.yml/witness.yml [2024-02-07 14:21:06,637 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:21:06,638 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:21:06,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-11.i [2024-02-07 14:21:07,623 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:21:07,808 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:21:07,809 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-11.i [2024-02-07 14:21:07,837 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/143c8de78/5c3db1139748419691e26a3da9b97f6d/FLAG0927c7a6a [2024-02-07 14:21:07,847 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/143c8de78/5c3db1139748419691e26a3da9b97f6d [2024-02-07 14:21:07,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:21:07,853 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:21:07,854 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:21:07,854 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:21:07,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:21:07,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:21:06" (1/2) ... [2024-02-07 14:21:07,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44210c25 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:07, skipping insertion in model container [2024-02-07 14:21:07,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:21:06" (1/2) ... [2024-02-07 14:21:07,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@79293c70 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:07, skipping insertion in model container [2024-02-07 14:21:07,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:21:07" (2/2) ... [2024-02-07 14:21:07,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44210c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:07, skipping insertion in model container [2024-02-07 14:21:07,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:21:07" (2/2) ... [2024-02-07 14:21:07,863 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:21:07,965 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:21:07,966 INFO L76 edCorrectnessWitness]: Location invariant before [L706-L706] (0 <= cur) && (0 <= prev) [2024-02-07 14:21:07,966 INFO L76 edCorrectnessWitness]: Location invariant before [L690-L690] 2 <= i [2024-02-07 14:21:07,966 INFO L76 edCorrectnessWitness]: Location invariant before [L726-L726] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-02-07 14:21:07,966 INFO L76 edCorrectnessWitness]: Location invariant before [L719-L719] j == 1 [2024-02-07 14:21:07,967 INFO L76 edCorrectnessWitness]: Location invariant before [L724-L724] (((1 <= i) && (1 <= j)) && (1 <= correct)) && (correct != 0) [2024-02-07 14:21:07,967 INFO L76 edCorrectnessWitness]: Location invariant before [L716-L716] i == 1 [2024-02-07 14:21:07,967 INFO L76 edCorrectnessWitness]: Location invariant before [L681-L681] ((0 <= expression) && (expression <= 1)) && (expression == 0 || expression == 1) [2024-02-07 14:21:07,967 INFO L76 edCorrectnessWitness]: Location invariant before [L698-L698] 2 <= j [2024-02-07 14:21:07,967 INFO L76 edCorrectnessWitness]: Location invariant before [L708-L708] (0 <= prev) && (0 <= next) [2024-02-07 14:21:07,967 INFO L76 edCorrectnessWitness]: Location invariant before [L707-L707] (0 <= cur) && (0 <= next) [2024-02-07 14:21:07,967 INFO L76 edCorrectnessWitness]: Location invariant before [L725-L725] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-02-07 14:21:07,968 INFO L76 edCorrectnessWitness]: Location invariant before [L689-L689] (1 <= i) && (1 <= j) [2024-02-07 14:21:07,968 INFO L76 edCorrectnessWitness]: Location invariant before [L710-L710] 0 <= prev [2024-02-07 14:21:07,968 INFO L76 edCorrectnessWitness]: Location invariant before [L697-L697] (1 <= i) && (1 <= j) [2024-02-07 14:21:07,968 INFO L76 edCorrectnessWitness]: Location invariant after [L724-L724] (((1 <= i) && (1 <= j)) && (1 <= correct)) && (correct != 0) [2024-02-07 14:21:07,968 INFO L76 edCorrectnessWitness]: Location invariant before [L723-L723] 0 <= correct [2024-02-07 14:21:08,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:21:08,304 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-11.i[30241,30254] [2024-02-07 14:21:08,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:21:08,330 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 14:21:08,375 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-11.i[30241,30254] 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 [2024-02-07 14:21:08,383 WARN L423 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-02-07 14:21:08,383 WARN L423 MainDispatcher]: Unable to annotate assert_cond = i <= correct && j <= correct with a witness entry Start Parsing Local Start Parsing Local [2024-02-07 14:21:08,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:21:08,434 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:21:08,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08 WrapperNode [2024-02-07 14:21:08,434 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:21:08,435 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:21:08,435 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:21:08,436 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:21:08,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,489 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2024-02-07 14:21:08,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:21:08,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:21:08,490 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:21:08,491 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:21:08,498 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,505 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,524 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 14:21:08,524 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,524 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,534 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,542 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,547 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:21:08,549 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:21:08,549 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:21:08,550 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:21:08,550 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:21:08,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:08,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 14:21:08,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 14:21:08,628 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-07 14:21:08,629 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-07 14:21:08,629 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-07 14:21:08,629 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-07 14:21:08,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:21:08,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:21:08,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:21:08,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:21:08,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:21:08,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:21:08,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:21:08,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:21:08,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:21:08,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:21:08,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:21:08,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:21:08,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:21:08,632 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:21:08,762 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:21:08,764 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:21:08,971 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:21:08,971 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:21:09,058 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:21:09,059 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-07 14:21:09,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:21:09 BoogieIcfgContainer [2024-02-07 14:21:09,059 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:21:09,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:21:09,061 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:21:09,064 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:21:09,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:21:06" (1/4) ... [2024-02-07 14:21:09,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dc07f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:21:09, skipping insertion in model container [2024-02-07 14:21:09,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:21:07" (2/4) ... [2024-02-07 14:21:09,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dc07f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:21:09, skipping insertion in model container [2024-02-07 14:21:09,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:21:08" (3/4) ... [2024-02-07 14:21:09,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dc07f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:21:09, skipping insertion in model container [2024-02-07 14:21:09,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:21:09" (4/4) ... [2024-02-07 14:21:09,067 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2024-02-07 14:21:09,081 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:21:09,081 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-02-07 14:21:09,081 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:21:09,109 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:21:09,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 49 transitions, 106 flow [2024-02-07 14:21:09,154 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-02-07 14:21:09,154 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:21:09,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 47 events. 4/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 93 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-02-07 14:21:09,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 49 transitions, 106 flow [2024-02-07 14:21:09,160 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 47 transitions, 100 flow [2024-02-07 14:21:09,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:21:09,173 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;@5c6bc571, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:21:09,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 14:21:09,175 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:21:09,175 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:21:09,176 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:21:09,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:09,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:21:09,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:09,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:09,181 INFO L85 PathProgramCache]: Analyzing trace with hash 9963, now seen corresponding path program 1 times [2024-02-07 14:21:09,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:09,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282880596] [2024-02-07 14:21:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:09,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:09,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282880596] [2024-02-07 14:21:09,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282880596] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:09,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:09,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:21:09,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477368290] [2024-02-07 14:21:09,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:09,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 14:21:09,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:09,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 14:21:09,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 14:21:09,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:09,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 100 flow. Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:09,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:09,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:09,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:09,667 INFO L124 PetriNetUnfolderBase]: 461/1017 cut-off events. [2024-02-07 14:21:09,668 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:21:09,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1733 conditions, 1017 events. 461/1017 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6574 event pairs, 344 based on Foata normal form. 25/864 useless extension candidates. Maximal degree in co-relation 1717. Up to 701 conditions per place. [2024-02-07 14:21:09,692 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 26 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2024-02-07 14:21:09,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 140 flow [2024-02-07 14:21:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 14:21:09,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 14:21:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 66 transitions. [2024-02-07 14:21:09,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-02-07 14:21:09,714 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 100 flow. Second operand 2 states and 66 transitions. [2024-02-07 14:21:09,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 140 flow [2024-02-07 14:21:09,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:21:09,720 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 86 flow [2024-02-07 14:21:09,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=86, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-02-07 14:21:09,741 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-02-07 14:21:09,742 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 86 flow [2024-02-07 14:21:09,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:09,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:09,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:09,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:21:09,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:09,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:09,746 INFO L85 PathProgramCache]: Analyzing trace with hash -939968002, now seen corresponding path program 1 times [2024-02-07 14:21:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:09,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254897698] [2024-02-07 14:21:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:09,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:10,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:10,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254897698] [2024-02-07 14:21:10,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254897698] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:10,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:10,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:10,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754521886] [2024-02-07 14:21:10,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:10,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:10,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:10,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:10,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:10,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:10,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:10,513 INFO L124 PetriNetUnfolderBase]: 825/1417 cut-off events. [2024-02-07 14:21:10,513 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:21:10,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2684 conditions, 1417 events. 825/1417 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7596 event pairs, 185 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2681. Up to 623 conditions per place. [2024-02-07 14:21:10,536 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 54 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2024-02-07 14:21:10,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 272 flow [2024-02-07 14:21:10,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-07 14:21:10,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581632653061225 [2024-02-07 14:21:10,544 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 86 flow. Second operand 4 states and 129 transitions. [2024-02-07 14:21:10,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 272 flow [2024-02-07 14:21:10,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:21:10,547 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 113 flow [2024-02-07 14:21:10,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-02-07 14:21:10,549 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-02-07 14:21:10,549 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 113 flow [2024-02-07 14:21:10,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:10,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:10,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:10,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:21:10,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:10,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:10,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1395258716, now seen corresponding path program 1 times [2024-02-07 14:21:10,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:10,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565527123] [2024-02-07 14:21:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:10,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:10,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:10,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565527123] [2024-02-07 14:21:10,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565527123] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:10,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:10,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:21:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424850819] [2024-02-07 14:21:10,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:10,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:21:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:10,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:21:10,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:21:10,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 14:21:10,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:10,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:10,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 14:21:10,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:11,249 INFO L124 PetriNetUnfolderBase]: 1635/3351 cut-off events. [2024-02-07 14:21:11,249 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2024-02-07 14:21:11,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6673 conditions, 3351 events. 1635/3351 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24893 event pairs, 552 based on Foata normal form. 0/2848 useless extension candidates. Maximal degree in co-relation 6668. Up to 1396 conditions per place. [2024-02-07 14:21:11,284 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 49 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-02-07 14:21:11,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 271 flow [2024-02-07 14:21:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:21:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:21:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-02-07 14:21:11,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-02-07 14:21:11,289 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 113 flow. Second operand 3 states and 92 transitions. [2024-02-07 14:21:11,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 271 flow [2024-02-07 14:21:11,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:21:11,307 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 127 flow [2024-02-07 14:21:11,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-02-07 14:21:11,308 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-02-07 14:21:11,309 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 127 flow [2024-02-07 14:21:11,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:11,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:11,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:11,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:21:11,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:11,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:11,310 INFO L85 PathProgramCache]: Analyzing trace with hash -303346952, now seen corresponding path program 1 times [2024-02-07 14:21:11,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:11,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363131957] [2024-02-07 14:21:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:11,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:11,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:11,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363131957] [2024-02-07 14:21:11,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363131957] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:11,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:11,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:21:11,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453336261] [2024-02-07 14:21:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:11,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:11,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:11,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-02-07 14:21:11,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:11,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:11,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-02-07 14:21:11,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:12,017 INFO L124 PetriNetUnfolderBase]: 1815/3600 cut-off events. [2024-02-07 14:21:12,017 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-02-07 14:21:12,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 3600 events. 1815/3600 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 26303 event pairs, 479 based on Foata normal form. 45/3216 useless extension candidates. Maximal degree in co-relation 7505. Up to 1531 conditions per place. [2024-02-07 14:21:12,073 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-02-07 14:21:12,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 425 flow [2024-02-07 14:21:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:21:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:21:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-02-07 14:21:12,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563265306122449 [2024-02-07 14:21:12,075 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 127 flow. Second operand 5 states and 138 transitions. [2024-02-07 14:21:12,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 425 flow [2024-02-07 14:21:12,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 91 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:21:12,079 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 149 flow [2024-02-07 14:21:12,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2024-02-07 14:21:12,081 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2024-02-07 14:21:12,081 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 149 flow [2024-02-07 14:21:12,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:12,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:12,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:12,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:21:12,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:12,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:12,083 INFO L85 PathProgramCache]: Analyzing trace with hash -303346150, now seen corresponding path program 1 times [2024-02-07 14:21:12,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:12,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168669899] [2024-02-07 14:21:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:12,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:12,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:12,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168669899] [2024-02-07 14:21:12,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168669899] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:12,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:12,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:12,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391087096] [2024-02-07 14:21:12,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:12,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:21:12,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:21:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:21:12,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:12,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:12,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:12,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:12,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:12,473 INFO L124 PetriNetUnfolderBase]: 1095/2324 cut-off events. [2024-02-07 14:21:12,474 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2024-02-07 14:21:12,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 2324 events. 1095/2324 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16295 event pairs, 260 based on Foata normal form. 45/2129 useless extension candidates. Maximal degree in co-relation 5142. Up to 1126 conditions per place. [2024-02-07 14:21:12,486 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 43 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-07 14:21:12,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 281 flow [2024-02-07 14:21:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:21:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:21:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-02-07 14:21:12,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-02-07 14:21:12,488 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 149 flow. Second operand 3 states and 91 transitions. [2024-02-07 14:21:12,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 281 flow [2024-02-07 14:21:12,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 275 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 14:21:12,495 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 151 flow [2024-02-07 14:21:12,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=3, PETRI_FLOW=151, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-02-07 14:21:12,497 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-02-07 14:21:12,497 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 151 flow [2024-02-07 14:21:12,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:12,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:12,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:12,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:21:12,498 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:12,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:12,498 INFO L85 PathProgramCache]: Analyzing trace with hash 600376683, now seen corresponding path program 1 times [2024-02-07 14:21:12,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:12,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367116964] [2024-02-07 14:21:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:12,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:12,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:12,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367116964] [2024-02-07 14:21:12,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367116964] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:12,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:12,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:12,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033474] [2024-02-07 14:21:12,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:12,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:12,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:12,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:12,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:12,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:12,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:12,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:12,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:12,755 INFO L124 PetriNetUnfolderBase]: 1213/2076 cut-off events. [2024-02-07 14:21:12,755 INFO L125 PetriNetUnfolderBase]: For 956/956 co-relation queries the response was YES. [2024-02-07 14:21:12,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5158 conditions, 2076 events. 1213/2076 cut-off events. For 956/956 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11634 event pairs, 212 based on Foata normal form. 38/1984 useless extension candidates. Maximal degree in co-relation 5147. Up to 1227 conditions per place. [2024-02-07 14:21:12,771 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 63 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2024-02-07 14:21:12,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 405 flow [2024-02-07 14:21:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 14:21:12,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-02-07 14:21:12,773 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 151 flow. Second operand 4 states and 127 transitions. [2024-02-07 14:21:12,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 405 flow [2024-02-07 14:21:12,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 397 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:21:12,776 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 167 flow [2024-02-07 14:21:12,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-02-07 14:21:12,779 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-02-07 14:21:12,779 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 167 flow [2024-02-07 14:21:12,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:12,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:12,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:12,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:21:12,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:12,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:12,781 INFO L85 PathProgramCache]: Analyzing trace with hash -813820632, now seen corresponding path program 1 times [2024-02-07 14:21:12,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:12,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045544809] [2024-02-07 14:21:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:12,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:12,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045544809] [2024-02-07 14:21:12,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045544809] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:12,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:12,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:21:12,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592994574] [2024-02-07 14:21:12,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:12,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:12,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:12,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:12,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:12,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 14:21:12,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:12,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:12,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 14:21:12,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:13,250 INFO L124 PetriNetUnfolderBase]: 2113/4332 cut-off events. [2024-02-07 14:21:13,251 INFO L125 PetriNetUnfolderBase]: For 2344/2344 co-relation queries the response was YES. [2024-02-07 14:21:13,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10255 conditions, 4332 events. 2113/4332 cut-off events. For 2344/2344 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 32342 event pairs, 204 based on Foata normal form. 50/3855 useless extension candidates. Maximal degree in co-relation 10243. Up to 1551 conditions per place. [2024-02-07 14:21:13,277 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 80 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2024-02-07 14:21:13,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 535 flow [2024-02-07 14:21:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:21:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:21:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-02-07 14:21:13,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-02-07 14:21:13,278 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 167 flow. Second operand 5 states and 145 transitions. [2024-02-07 14:21:13,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 535 flow [2024-02-07 14:21:13,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 97 transitions, 509 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-02-07 14:21:13,284 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 181 flow [2024-02-07 14:21:13,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2024-02-07 14:21:13,285 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2024-02-07 14:21:13,285 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 181 flow [2024-02-07 14:21:13,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:13,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:13,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:13,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:21:13,285 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:13,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash 900956709, now seen corresponding path program 1 times [2024-02-07 14:21:13,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:13,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736448953] [2024-02-07 14:21:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:13,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:13,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:13,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736448953] [2024-02-07 14:21:13,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736448953] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:13,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:13,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:13,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251857368] [2024-02-07 14:21:13,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:13,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:13,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:13,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:13,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:13,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:13,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:13,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:13,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:13,566 INFO L124 PetriNetUnfolderBase]: 1647/2880 cut-off events. [2024-02-07 14:21:13,567 INFO L125 PetriNetUnfolderBase]: For 2184/2184 co-relation queries the response was YES. [2024-02-07 14:21:13,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7416 conditions, 2880 events. 1647/2880 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17113 event pairs, 433 based on Foata normal form. 57/2800 useless extension candidates. Maximal degree in co-relation 7402. Up to 1555 conditions per place. [2024-02-07 14:21:13,582 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 66 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2024-02-07 14:21:13,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 467 flow [2024-02-07 14:21:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 14:21:13,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-02-07 14:21:13,583 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 181 flow. Second operand 4 states and 127 transitions. [2024-02-07 14:21:13,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 467 flow [2024-02-07 14:21:13,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 453 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:21:13,586 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 189 flow [2024-02-07 14:21:13,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2024-02-07 14:21:13,587 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-02-07 14:21:13,587 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 189 flow [2024-02-07 14:21:13,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:13,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:13,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:13,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:21:13,588 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:13,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:13,588 INFO L85 PathProgramCache]: Analyzing trace with hash -397569460, now seen corresponding path program 1 times [2024-02-07 14:21:13,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:13,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805876128] [2024-02-07 14:21:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:13,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:13,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805876128] [2024-02-07 14:21:13,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805876128] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742526641] [2024-02-07 14:21:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:13,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:13,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:13,644 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) [2024-02-07 14:21:13,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:21:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:13,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:21:13,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:21:13,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:21:13,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742526641] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:13,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:21:13,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2024-02-07 14:21:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591765708] [2024-02-07 14:21:13,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:13,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:13,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:21:13,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 14:21:13,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:13,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:13,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 14:21:13,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:14,032 INFO L124 PetriNetUnfolderBase]: 1647/3425 cut-off events. [2024-02-07 14:21:14,033 INFO L125 PetriNetUnfolderBase]: For 2786/2786 co-relation queries the response was YES. [2024-02-07 14:21:14,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8333 conditions, 3425 events. 1647/3425 cut-off events. For 2786/2786 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 24140 event pairs, 106 based on Foata normal form. 129/3287 useless extension candidates. Maximal degree in co-relation 8318. Up to 2236 conditions per place. [2024-02-07 14:21:14,091 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 46 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-02-07 14:21:14,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 343 flow [2024-02-07 14:21:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-02-07 14:21:14,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-02-07 14:21:14,093 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 189 flow. Second operand 4 states and 99 transitions. [2024-02-07 14:21:14,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 343 flow [2024-02-07 14:21:14,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 325 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-02-07 14:21:14,100 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 173 flow [2024-02-07 14:21:14,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=173, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2024-02-07 14:21:14,102 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-02-07 14:21:14,102 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 173 flow [2024-02-07 14:21:14,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:14,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:14,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:14,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:14,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:14,316 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:14,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash 560248912, now seen corresponding path program 1 times [2024-02-07 14:21:14,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:14,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590355681] [2024-02-07 14:21:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:14,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:14,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:14,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590355681] [2024-02-07 14:21:14,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590355681] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:14,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736858870] [2024-02-07 14:21:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:14,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:14,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:14,395 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) [2024-02-07 14:21:14,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:21:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:14,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-07 14:21:14,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:14,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:21:14,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736858870] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:14,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:21:14,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 8 [2024-02-07 14:21:14,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568985732] [2024-02-07 14:21:14,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:14,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:21:14,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:14,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:21:14,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-02-07 14:21:14,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-02-07 14:21:14,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 173 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:14,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:14,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-02-07 14:21:14,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:14,838 INFO L124 PetriNetUnfolderBase]: 1647/3296 cut-off events. [2024-02-07 14:21:14,838 INFO L125 PetriNetUnfolderBase]: For 2325/2325 co-relation queries the response was YES. [2024-02-07 14:21:14,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 3296 events. 1647/3296 cut-off events. For 2325/2325 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 22095 event pairs, 106 based on Foata normal form. 129/3158 useless extension candidates. Maximal degree in co-relation 7886. Up to 1677 conditions per place. [2024-02-07 14:21:14,853 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 71 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-02-07 14:21:14,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 497 flow [2024-02-07 14:21:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:21:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:21:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-02-07 14:21:14,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-02-07 14:21:14,854 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 173 flow. Second operand 6 states and 139 transitions. [2024-02-07 14:21:14,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 497 flow [2024-02-07 14:21:14,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 490 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:21:14,859 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 168 flow [2024-02-07 14:21:14,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2024-02-07 14:21:14,859 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-02-07 14:21:14,859 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 168 flow [2024-02-07 14:21:14,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:14,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:14,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:14,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:15,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-07 14:21:15,071 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:15,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash 560249714, now seen corresponding path program 1 times [2024-02-07 14:21:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:15,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49749013] [2024-02-07 14:21:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:15,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:15,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49749013] [2024-02-07 14:21:15,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49749013] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:15,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814717719] [2024-02-07 14:21:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:15,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:15,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:15,099 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) [2024-02-07 14:21:15,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:21:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:15,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 14:21:15,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:15,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:15,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814717719] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:15,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:15,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-07 14:21:15,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917376563] [2024-02-07 14:21:15,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:15,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:21:15,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:15,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:21:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:21:15,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:21:15,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:15,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:15,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:21:15,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:15,427 INFO L124 PetriNetUnfolderBase]: 1991/3388 cut-off events. [2024-02-07 14:21:15,428 INFO L125 PetriNetUnfolderBase]: For 2832/2832 co-relation queries the response was YES. [2024-02-07 14:21:15,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9213 conditions, 3388 events. 1991/3388 cut-off events. For 2832/2832 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 17460 event pairs, 313 based on Foata normal form. 129/3383 useless extension candidates. Maximal degree in co-relation 9200. Up to 775 conditions per place. [2024-02-07 14:21:15,443 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 94 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2024-02-07 14:21:15,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 110 transitions, 646 flow [2024-02-07 14:21:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:21:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:21:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-02-07 14:21:15,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-02-07 14:21:15,444 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 168 flow. Second operand 6 states and 179 transitions. [2024-02-07 14:21:15,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 110 transitions, 646 flow [2024-02-07 14:21:15,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 110 transitions, 625 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-02-07 14:21:15,449 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 195 flow [2024-02-07 14:21:15,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2024-02-07 14:21:15,450 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-02-07 14:21:15,450 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 195 flow [2024-02-07 14:21:15,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:15,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:15,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:15,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:15,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:15,662 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:15,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1018936604, now seen corresponding path program 1 times [2024-02-07 14:21:15,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:15,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460006163] [2024-02-07 14:21:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:15,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:15,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460006163] [2024-02-07 14:21:15,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460006163] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:15,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:15,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:15,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147069148] [2024-02-07 14:21:15,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:15,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:15,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:15,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:15,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 195 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:15,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:15,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:15,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:15,981 INFO L124 PetriNetUnfolderBase]: 2009/3483 cut-off events. [2024-02-07 14:21:15,982 INFO L125 PetriNetUnfolderBase]: For 4809/4809 co-relation queries the response was YES. [2024-02-07 14:21:15,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9789 conditions, 3483 events. 2009/3483 cut-off events. For 4809/4809 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 19256 event pairs, 557 based on Foata normal form. 133/3555 useless extension candidates. Maximal degree in co-relation 9775. Up to 1395 conditions per place. [2024-02-07 14:21:15,998 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-02-07 14:21:15,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 547 flow [2024-02-07 14:21:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-02-07 14:21:15,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-02-07 14:21:16,000 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 195 flow. Second operand 4 states and 128 transitions. [2024-02-07 14:21:16,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 547 flow [2024-02-07 14:21:16,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 543 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:21:16,004 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 219 flow [2024-02-07 14:21:16,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2024-02-07 14:21:16,005 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2024-02-07 14:21:16,005 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 219 flow [2024-02-07 14:21:16,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:16,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:16,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:16,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 14:21:16,006 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:16,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1151039460, now seen corresponding path program 2 times [2024-02-07 14:21:16,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:16,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552567128] [2024-02-07 14:21:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:16,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:16,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:16,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552567128] [2024-02-07 14:21:16,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552567128] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:16,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:16,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:16,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128276101] [2024-02-07 14:21:16,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:16,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:16,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:16,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:16,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:16,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:16,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:16,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:16,305 INFO L124 PetriNetUnfolderBase]: 2029/3522 cut-off events. [2024-02-07 14:21:16,306 INFO L125 PetriNetUnfolderBase]: For 6210/6210 co-relation queries the response was YES. [2024-02-07 14:21:16,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9936 conditions, 3522 events. 2029/3522 cut-off events. For 6210/6210 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 19467 event pairs, 506 based on Foata normal form. 114/3573 useless extension candidates. Maximal degree in co-relation 9919. Up to 1122 conditions per place. [2024-02-07 14:21:16,356 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 69 selfloop transitions, 4 changer transitions 3/88 dead transitions. [2024-02-07 14:21:16,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 537 flow [2024-02-07 14:21:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-02-07 14:21:16,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-02-07 14:21:16,359 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 219 flow. Second operand 4 states and 124 transitions. [2024-02-07 14:21:16,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 537 flow [2024-02-07 14:21:16,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 525 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-02-07 14:21:16,369 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 205 flow [2024-02-07 14:21:16,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2024-02-07 14:21:16,370 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-02-07 14:21:16,371 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 205 flow [2024-02-07 14:21:16,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:16,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:16,371 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:16,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 14:21:16,371 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:16,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:16,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1195539322, now seen corresponding path program 2 times [2024-02-07 14:21:16,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:16,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923247380] [2024-02-07 14:21:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:16,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-02-07 14:21:16,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:16,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923247380] [2024-02-07 14:21:16,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923247380] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:16,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:16,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:16,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53251669] [2024-02-07 14:21:16,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:16,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:16,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:16,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-02-07 14:21:16,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:16,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:16,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-02-07 14:21:16,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:16,707 INFO L124 PetriNetUnfolderBase]: 2065/3667 cut-off events. [2024-02-07 14:21:16,707 INFO L125 PetriNetUnfolderBase]: For 4082/4082 co-relation queries the response was YES. [2024-02-07 14:21:16,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10494 conditions, 3667 events. 2065/3667 cut-off events. For 4082/4082 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 20026 event pairs, 1262 based on Foata normal form. 0/3550 useless extension candidates. Maximal degree in co-relation 10478. Up to 2405 conditions per place. [2024-02-07 14:21:16,725 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 48 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-07 14:21:16,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 377 flow [2024-02-07 14:21:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-02-07 14:21:16,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-02-07 14:21:16,727 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 205 flow. Second operand 4 states and 89 transitions. [2024-02-07 14:21:16,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 377 flow [2024-02-07 14:21:16,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:21:16,733 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 205 flow [2024-02-07 14:21:16,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2024-02-07 14:21:16,734 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-02-07 14:21:16,734 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 205 flow [2024-02-07 14:21:16,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:16,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:16,735 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:16,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 14:21:16,735 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:16,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:16,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2137937304, now seen corresponding path program 1 times [2024-02-07 14:21:16,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:16,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855494453] [2024-02-07 14:21:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:16,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-02-07 14:21:16,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:16,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855494453] [2024-02-07 14:21:16,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855494453] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:16,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:16,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:21:16,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972997587] [2024-02-07 14:21:16,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:16,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:21:16,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:16,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:21:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:21:16,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:21:16,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:16,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:16,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:21:16,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:17,046 INFO L124 PetriNetUnfolderBase]: 1957/3505 cut-off events. [2024-02-07 14:21:17,047 INFO L125 PetriNetUnfolderBase]: For 3548/3548 co-relation queries the response was YES. [2024-02-07 14:21:17,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10126 conditions, 3505 events. 1957/3505 cut-off events. For 3548/3548 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 19105 event pairs, 1349 based on Foata normal form. 0/3388 useless extension candidates. Maximal degree in co-relation 10110. Up to 2568 conditions per place. [2024-02-07 14:21:17,060 INFO L140 encePairwiseOnDemand]: 47/49 looper letters, 48 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2024-02-07 14:21:17,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 373 flow [2024-02-07 14:21:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:21:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:21:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-02-07 14:21:17,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-02-07 14:21:17,061 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 205 flow. Second operand 3 states and 80 transitions. [2024-02-07 14:21:17,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 373 flow [2024-02-07 14:21:17,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:21:17,067 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 202 flow [2024-02-07 14:21:17,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2024-02-07 14:21:17,068 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2024-02-07 14:21:17,068 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 202 flow [2024-02-07 14:21:17,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:17,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:17,069 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:17,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 14:21:17,069 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:17,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1851546691, now seen corresponding path program 1 times [2024-02-07 14:21:17,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:17,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970919817] [2024-02-07 14:21:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:17,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:17,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:17,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970919817] [2024-02-07 14:21:17,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970919817] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:17,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575065540] [2024-02-07 14:21:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:17,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:17,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:17,133 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) [2024-02-07 14:21:17,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 14:21:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:17,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:21:17,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:17,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:17,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575065540] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:17,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:17,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-07 14:21:17,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465994272] [2024-02-07 14:21:17,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:17,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:21:17,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:17,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:21:17,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:21:17,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:21:17,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 202 flow. Second operand has 13 states, 13 states have (on average 19.923076923076923) internal successors, (259), 13 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:17,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:17,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:21:17,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:17,950 INFO L124 PetriNetUnfolderBase]: 4981/7879 cut-off events. [2024-02-07 14:21:17,950 INFO L125 PetriNetUnfolderBase]: For 9497/9497 co-relation queries the response was YES. [2024-02-07 14:21:17,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24549 conditions, 7879 events. 4981/7879 cut-off events. For 9497/9497 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 38332 event pairs, 392 based on Foata normal form. 324/8090 useless extension candidates. Maximal degree in co-relation 24533. Up to 833 conditions per place. [2024-02-07 14:21:17,992 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 195 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2024-02-07 14:21:17,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 215 transitions, 1506 flow [2024-02-07 14:21:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:21:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:21:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-02-07 14:21:17,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576530612244898 [2024-02-07 14:21:17,994 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 202 flow. Second operand 12 states and 339 transitions. [2024-02-07 14:21:17,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 215 transitions, 1506 flow [2024-02-07 14:21:18,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 215 transitions, 1505 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:21:18,005 INFO L231 Difference]: Finished difference. Result has 85 places, 52 transitions, 309 flow [2024-02-07 14:21:18,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=85, PETRI_TRANSITIONS=52} [2024-02-07 14:21:18,006 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-02-07 14:21:18,006 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 52 transitions, 309 flow [2024-02-07 14:21:18,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.923076923076923) internal successors, (259), 13 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:18,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:18,007 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:18,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:18,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-07 14:21:18,218 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:18,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash 758074797, now seen corresponding path program 2 times [2024-02-07 14:21:18,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:18,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142010970] [2024-02-07 14:21:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:18,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:18,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142010970] [2024-02-07 14:21:18,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142010970] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:18,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324042768] [2024-02-07 14:21:18,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:21:18,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:18,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:18,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:21:18,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 14:21:18,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 14:21:18,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:21:18,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:21:18,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-02-07 14:21:18,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:21:18,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324042768] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:18,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:21:18,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2024-02-07 14:21:18,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435535308] [2024-02-07 14:21:18,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:18,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:18,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:18,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:21:18,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-02-07 14:21:18,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 52 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:18,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:18,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-02-07 14:21:18,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:19,061 INFO L124 PetriNetUnfolderBase]: 4117/6907 cut-off events. [2024-02-07 14:21:19,061 INFO L125 PetriNetUnfolderBase]: For 12314/12314 co-relation queries the response was YES. [2024-02-07 14:21:19,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23021 conditions, 6907 events. 4117/6907 cut-off events. For 12314/12314 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 35629 event pairs, 2915 based on Foata normal form. 0/6898 useless extension candidates. Maximal degree in co-relation 22999. Up to 5484 conditions per place. [2024-02-07 14:21:19,101 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 69 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-02-07 14:21:19,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 593 flow [2024-02-07 14:21:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-02-07 14:21:19,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-02-07 14:21:19,102 INFO L175 Difference]: Start difference. First operand has 85 places, 52 transitions, 309 flow. Second operand 4 states and 94 transitions. [2024-02-07 14:21:19,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 593 flow [2024-02-07 14:21:19,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 587 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:21:19,120 INFO L231 Difference]: Finished difference. Result has 84 places, 51 transitions, 305 flow [2024-02-07 14:21:19,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=84, PETRI_TRANSITIONS=51} [2024-02-07 14:21:19,121 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2024-02-07 14:21:19,121 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 305 flow [2024-02-07 14:21:19,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:19,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:19,121 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:19,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:19,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-07 14:21:19,332 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:19,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1634551544, now seen corresponding path program 1 times [2024-02-07 14:21:19,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:19,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983984928] [2024-02-07 14:21:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:19,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:19,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:19,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983984928] [2024-02-07 14:21:19,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983984928] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:19,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279086186] [2024-02-07 14:21:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:19,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:19,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:19,526 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:21:19,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 14:21:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:19,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:21:19,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:19,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:19,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279086186] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:19,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:19,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-02-07 14:21:19,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576873003] [2024-02-07 14:21:19,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:19,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-07 14:21:19,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-07 14:21:19,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-02-07 14:21:19,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:21:19,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 305 flow. Second operand has 25 states, 25 states have (on average 19.96) internal successors, (499), 25 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:19,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:19,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:21:19,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:21,877 INFO L124 PetriNetUnfolderBase]: 10165/15601 cut-off events. [2024-02-07 14:21:21,877 INFO L125 PetriNetUnfolderBase]: For 44273/44273 co-relation queries the response was YES. [2024-02-07 14:21:21,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54203 conditions, 15601 events. 10165/15601 cut-off events. For 44273/44273 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 73341 event pairs, 392 based on Foata normal form. 648/16190 useless extension candidates. Maximal degree in co-relation 54180. Up to 1697 conditions per place. [2024-02-07 14:21:22,047 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 399 selfloop transitions, 24 changer transitions 0/430 dead transitions. [2024-02-07 14:21:22,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 430 transitions, 3245 flow [2024-02-07 14:21:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-07 14:21:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-07 14:21:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 681 transitions. [2024-02-07 14:21:22,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790816326530612 [2024-02-07 14:21:22,066 INFO L175 Difference]: Start difference. First operand has 84 places, 51 transitions, 305 flow. Second operand 24 states and 681 transitions. [2024-02-07 14:21:22,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 430 transitions, 3245 flow [2024-02-07 14:21:22,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 430 transitions, 3242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:21:22,103 INFO L231 Difference]: Finished difference. Result has 118 places, 64 transitions, 558 flow [2024-02-07 14:21:22,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=558, PETRI_PLACES=118, PETRI_TRANSITIONS=64} [2024-02-07 14:21:22,104 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-02-07 14:21:22,104 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 64 transitions, 558 flow [2024-02-07 14:21:22,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 19.96) internal successors, (499), 25 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:22,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:22,104 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:22,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:22,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-07 14:21:22,316 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:22,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash -28826392, now seen corresponding path program 2 times [2024-02-07 14:21:22,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:22,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396213990] [2024-02-07 14:21:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:22,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:22,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:22,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396213990] [2024-02-07 14:21:22,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396213990] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:22,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590416779] [2024-02-07 14:21:22,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:21:22,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:22,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:22,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:21:22,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 14:21:22,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:21:22,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:21:22,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-07 14:21:22,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:23,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:23,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590416779] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:23,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:23,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2024-02-07 14:21:23,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980589723] [2024-02-07 14:21:23,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:23,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-07 14:21:23,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-07 14:21:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2024-02-07 14:21:23,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:21:23,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 64 transitions, 558 flow. Second operand has 27 states, 27 states have (on average 20.11111111111111) internal successors, (543), 27 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:23,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:23,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:21:23,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:25,887 INFO L124 PetriNetUnfolderBase]: 11029/16897 cut-off events. [2024-02-07 14:21:25,887 INFO L125 PetriNetUnfolderBase]: For 65513/65513 co-relation queries the response was YES. [2024-02-07 14:21:25,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62515 conditions, 16897 events. 11029/16897 cut-off events. For 65513/65513 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 79335 event pairs, 392 based on Foata normal form. 108/16946 useless extension candidates. Maximal degree in co-relation 62480. Up to 1841 conditions per place. [2024-02-07 14:21:26,010 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 433 selfloop transitions, 26 changer transitions 0/466 dead transitions. [2024-02-07 14:21:26,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 466 transitions, 3662 flow [2024-02-07 14:21:26,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-07 14:21:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-07 14:21:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 727 transitions. [2024-02-07 14:21:26,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706436420722135 [2024-02-07 14:21:26,017 INFO L175 Difference]: Start difference. First operand has 118 places, 64 transitions, 558 flow. Second operand 26 states and 727 transitions. [2024-02-07 14:21:26,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 466 transitions, 3662 flow [2024-02-07 14:21:26,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 466 transitions, 3644 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-02-07 14:21:26,150 INFO L231 Difference]: Finished difference. Result has 137 places, 67 transitions, 652 flow [2024-02-07 14:21:26,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=652, PETRI_PLACES=137, PETRI_TRANSITIONS=67} [2024-02-07 14:21:26,151 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 87 predicate places. [2024-02-07 14:21:26,151 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 67 transitions, 652 flow [2024-02-07 14:21:26,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 20.11111111111111) internal successors, (543), 27 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:26,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:26,153 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:26,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 14:21:26,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:26,365 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:21:26,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash 349041720, now seen corresponding path program 3 times [2024-02-07 14:21:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:26,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208199011] [2024-02-07 14:21:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:26,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:30,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:30,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208199011] [2024-02-07 14:21:30,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208199011] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:30,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200196007] [2024-02-07 14:21:30,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:21:30,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:30,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:30,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:21:30,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 14:21:30,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-02-07 14:21:30,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:21:30,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 80 conjunts are in the unsatisfiable core [2024-02-07 14:21:30,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 968 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:36,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:44,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200196007] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:44,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:44,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 224 [2024-02-07 14:21:44,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896921526] [2024-02-07 14:21:44,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:44,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 225 states [2024-02-07 14:21:44,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:44,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 225 interpolants. [2024-02-07 14:21:44,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3085, Invalid=47315, Unknown=0, NotChecked=0, Total=50400 [2024-02-07 14:21:45,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 49 [2024-02-07 14:21:45,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 67 transitions, 652 flow. Second operand has 225 states, 225 states have (on average 10.133333333333333) internal successors, (2280), 225 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:21:45,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:45,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 49 [2024-02-07 14:21:45,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand