./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-6.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-6.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-6.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_safe-6.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 14:21:06,016 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:21:06,075 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:21:06,079 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:21:06,080 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:21:06,110 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:21:06,111 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:21:06,111 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:21:06,112 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:21:06,115 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:21:06,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:21:06,116 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:21:06,117 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:21:06,117 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:21:06,118 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:21:06,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:21:06,118 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:21:06,118 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:21:06,118 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:21:06,120 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:21:06,120 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:21:06,120 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:21:06,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:21:06,121 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:21:06,121 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:21:06,121 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:21:06,121 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:21:06,121 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:21:06,122 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:21:06,122 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:21:06,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:21:06,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:21:06,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:21:06,124 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:21:06,124 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:21:06,124 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:21:06,124 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:21:06,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:21:06,125 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:21:06,125 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:21:06,125 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:21:06,125 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:21:06,125 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:21:06,126 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:21:06,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:21:06,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:21:06,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:21:06,363 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:21:06,363 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:21:06,364 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-6.i [2024-02-07 14:21:07,463 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:21:07,688 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:21:07,688 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-6.i [2024-02-07 14:21:07,702 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a4532d4f/192da564307e41b482b4e3f93323cfda/FLAG14654010e [2024-02-07 14:21:07,715 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a4532d4f/192da564307e41b482b4e3f93323cfda [2024-02-07 14:21:07,717 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:21:07,718 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:21:07,720 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_safe-6.yml/witness.yml [2024-02-07 14:21:07,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:21:07,798 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:21:07,799 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:21:07,800 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:21:07,804 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:21:07,804 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:21:07" (1/2) ... [2024-02-07 14:21:07,805 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ecc2800 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 14:21:07,805 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:21:07" (1/2) ... [2024-02-07 14:21:07,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66309f2e 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 14:21:07,807 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:21:07" (2/2) ... [2024-02-07 14:21:07,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ecc2800 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 14:21:07,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:21:07" (2/2) ... [2024-02-07 14:21:07,808 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:21:07,857 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:21:07,859 INFO L76 edCorrectnessWitness]: Location invariant before [L707-L707] (0 <= cur) && (0 <= next) [2024-02-07 14:21:07,859 INFO L76 edCorrectnessWitness]: Location invariant before [L689-L689] (1 <= i) && (1 <= j) [2024-02-07 14:21:07,859 INFO L76 edCorrectnessWitness]: Location invariant before [L725-L725] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-02-07 14:21:07,859 INFO L76 edCorrectnessWitness]: Location invariant before [L690-L690] 2 <= i [2024-02-07 14:21:07,859 INFO L76 edCorrectnessWitness]: Location invariant before [L697-L697] (1 <= i) && (1 <= j) [2024-02-07 14:21:07,860 INFO L76 edCorrectnessWitness]: Location invariant before [L710-L710] 0 <= prev [2024-02-07 14:21:07,860 INFO L76 edCorrectnessWitness]: Location invariant before [L719-L719] j == 1 [2024-02-07 14:21:07,860 INFO L76 edCorrectnessWitness]: Location invariant before [L698-L698] 2 <= j [2024-02-07 14:21:07,860 INFO L76 edCorrectnessWitness]: Location invariant after [L724-L724] (((1 <= i) && (1 <= j)) && (1 <= correct)) && (correct != 0) [2024-02-07 14:21:07,861 INFO L76 edCorrectnessWitness]: Location invariant before [L716-L716] i == 1 [2024-02-07 14:21:07,861 INFO L76 edCorrectnessWitness]: Location invariant before [L726-L726] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-02-07 14:21:07,861 INFO L76 edCorrectnessWitness]: Location invariant before [L723-L723] 0 <= correct [2024-02-07 14:21:07,861 INFO L76 edCorrectnessWitness]: Location invariant before [L708-L708] (0 <= prev) && (0 <= next) [2024-02-07 14:21:07,861 INFO L76 edCorrectnessWitness]: Location invariant before [L724-L724] (((1 <= i) && (1 <= j)) && (1 <= correct)) && (correct != 0) [2024-02-07 14:21:07,861 INFO L76 edCorrectnessWitness]: Location invariant before [L706-L706] (0 <= cur) && (0 <= prev) [2024-02-07 14:21:07,861 INFO L76 edCorrectnessWitness]: Location invariant before [L681-L681] ((0 <= expression) && (expression <= 1)) && (expression == 0 || expression == 1) [2024-02-07 14:21:07,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:21:08,192 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-6.i[30241,30254] [2024-02-07 14:21:08,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:21:08,226 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 14:21:08,278 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-6.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 14:21:08,298 WARN L423 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-02-07 14:21:08,298 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 14:21:08,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:21:08,339 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:21:08,339 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08 WrapperNode [2024-02-07 14:21:08,339 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:21:08,341 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:21:08,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:21:08,341 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:21:08,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,395 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2024-02-07 14:21:08,396 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:21:08,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:21:08,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:21:08,398 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:21:08,406 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,408 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,432 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 14:21:08,432 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,442 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,444 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,445 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,458 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:21:08,459 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:21:08,459 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:21:08,459 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:21:08,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (1/1) ... [2024-02-07 14:21:08,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:21:08,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:08,487 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 14:21:08,512 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 14:21:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-07 14:21:08,525 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-07 14:21:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-07 14:21:08,525 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-07 14:21:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:21:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:21:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:21:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:21:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:21:08,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:21:08,528 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 14:21:08,620 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:21:08,622 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:21:08,805 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:21:08,805 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:21:08,898 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:21:08,898 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-07 14:21:08,898 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:21:08 BoogieIcfgContainer [2024-02-07 14:21:08,899 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:21:08,916 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:21:08,916 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:21:08,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:21:08,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:21:07" (1/4) ... [2024-02-07 14:21:08,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afd43d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:21:08, skipping insertion in model container [2024-02-07 14:21:08,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:21:07" (2/4) ... [2024-02-07 14:21:08,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afd43d9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:21:08, skipping insertion in model container [2024-02-07 14:21:08,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:21:08" (3/4) ... [2024-02-07 14:21:08,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afd43d9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:21:08, skipping insertion in model container [2024-02-07 14:21:08,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:21:08" (4/4) ... [2024-02-07 14:21:08,922 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2024-02-07 14:21:08,935 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:21:08,935 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-02-07 14:21:08,935 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:21:08,963 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:21:08,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 49 transitions, 106 flow [2024-02-07 14:21:09,008 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-02-07 14:21:09,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:21:09,011 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 14:21:09,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 49 transitions, 106 flow [2024-02-07 14:21:09,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 47 transitions, 100 flow [2024-02-07 14:21:09,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:21:09,026 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;@41b019f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:21:09,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 14:21:09,028 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:21:09,030 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:21:09,030 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:21:09,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:09,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:21:09,031 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 14:21:09,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash 9963, now seen corresponding path program 1 times [2024-02-07 14:21:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:09,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054315947] [2024-02-07 14:21:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:09,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:09,246 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 14:21:09,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:09,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054315947] [2024-02-07 14:21:09,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054315947] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:09,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:09,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:21:09,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543852179] [2024-02-07 14:21:09,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:09,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 14:21:09,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:09,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 14:21:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 14:21:09,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:09,326 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 14:21:09,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:09,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:09,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:09,646 INFO L124 PetriNetUnfolderBase]: 461/1017 cut-off events. [2024-02-07 14:21:09,646 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:21:09,651 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 14:21:09,671 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 26 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2024-02-07 14:21:09,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 140 flow [2024-02-07 14:21:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 14:21:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 14:21:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 66 transitions. [2024-02-07 14:21:09,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-02-07 14:21:09,689 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 100 flow. Second operand 2 states and 66 transitions. [2024-02-07 14:21:09,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 140 flow [2024-02-07 14:21:09,692 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 14:21:09,708 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 86 flow [2024-02-07 14:21:09,710 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 14:21:09,713 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-02-07 14:21:09,714 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 86 flow [2024-02-07 14:21:09,714 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 14:21:09,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:09,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:09,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:21:09,716 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 14:21:09,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash -939968002, now seen corresponding path program 1 times [2024-02-07 14:21:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:09,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30438386] [2024-02-07 14:21:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:09,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:09,886 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 14:21:09,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:09,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30438386] [2024-02-07 14:21:09,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30438386] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:09,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:09,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:09,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079249390] [2024-02-07 14:21:09,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:09,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:09,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:09,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:09,890 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 14:21:09,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:09,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:09,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:10,048 INFO L124 PetriNetUnfolderBase]: 825/1417 cut-off events. [2024-02-07 14:21:10,048 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:21:10,051 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 14:21:10,056 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 54 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2024-02-07 14:21:10,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 272 flow [2024-02-07 14:21:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-07 14:21:10,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581632653061225 [2024-02-07 14:21:10,059 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 86 flow. Second operand 4 states and 129 transitions. [2024-02-07 14:21:10,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 272 flow [2024-02-07 14:21:10,059 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 14:21:10,061 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 113 flow [2024-02-07 14:21:10,061 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 14:21:10,062 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-02-07 14:21:10,062 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 113 flow [2024-02-07 14:21:10,062 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 14:21:10,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:10,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:10,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:21:10,063 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 14:21:10,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1395258716, now seen corresponding path program 1 times [2024-02-07 14:21:10,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:10,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094704623] [2024-02-07 14:21:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:10,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:10,162 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 14:21:10,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:10,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094704623] [2024-02-07 14:21:10,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094704623] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:10,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:10,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:21:10,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777486724] [2024-02-07 14:21:10,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:10,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:21:10,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:10,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:21:10,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:21:10,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 14:21:10,173 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 14:21:10,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:10,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 14:21:10,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:10,418 INFO L124 PetriNetUnfolderBase]: 1635/3351 cut-off events. [2024-02-07 14:21:10,419 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2024-02-07 14:21:10,424 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 14:21:10,439 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 49 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-02-07 14:21:10,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 271 flow [2024-02-07 14:21:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:21:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:21:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-02-07 14:21:10,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-02-07 14:21:10,445 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 113 flow. Second operand 3 states and 92 transitions. [2024-02-07 14:21:10,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 271 flow [2024-02-07 14:21:10,446 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 14:21:10,447 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 127 flow [2024-02-07 14:21:10,448 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 14:21:10,449 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-02-07 14:21:10,449 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 127 flow [2024-02-07 14:21:10,449 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 14:21:10,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:10,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:10,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:21:10,450 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 14:21:10,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:10,450 INFO L85 PathProgramCache]: Analyzing trace with hash -303346952, now seen corresponding path program 1 times [2024-02-07 14:21:10,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:10,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685629983] [2024-02-07 14:21:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:10,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:10,552 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 14:21:10,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:10,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685629983] [2024-02-07 14:21:10,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685629983] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:10,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:10,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:21:10,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832249055] [2024-02-07 14:21:10,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:10,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:10,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:10,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:10,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-02-07 14:21:10,562 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 14:21:10,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:10,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-02-07 14:21:10,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:10,823 INFO L124 PetriNetUnfolderBase]: 1815/3600 cut-off events. [2024-02-07 14:21:10,823 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-02-07 14:21:10,827 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 14:21:10,842 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-02-07 14:21:10,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 425 flow [2024-02-07 14:21:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:21:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:21:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-02-07 14:21:10,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563265306122449 [2024-02-07 14:21:10,843 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 127 flow. Second operand 5 states and 138 transitions. [2024-02-07 14:21:10,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 425 flow [2024-02-07 14:21:10,844 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 14:21:10,845 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 149 flow [2024-02-07 14:21:10,846 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 14:21:10,846 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2024-02-07 14:21:10,846 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 149 flow [2024-02-07 14:21:10,847 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 14:21:10,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:10,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:10,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:21:10,847 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 14:21:10,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash -303346150, now seen corresponding path program 1 times [2024-02-07 14:21:10,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:10,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365183892] [2024-02-07 14:21:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:10,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:10,871 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 14:21:10,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:10,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365183892] [2024-02-07 14:21:10,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365183892] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:10,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:10,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:10,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992587811] [2024-02-07 14:21:10,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:10,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:21:10,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:10,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:21:10,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:21:10,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:10,876 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 14:21:10,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:10,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:10,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:11,065 INFO L124 PetriNetUnfolderBase]: 1095/2324 cut-off events. [2024-02-07 14:21:11,065 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2024-02-07 14:21:11,068 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 14:21:11,078 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 43 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-07 14:21:11,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 281 flow [2024-02-07 14:21:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:21:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:21:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-02-07 14:21:11,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-02-07 14:21:11,080 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 149 flow. Second operand 3 states and 91 transitions. [2024-02-07 14:21:11,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 281 flow [2024-02-07 14:21:11,083 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 14:21:11,084 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 151 flow [2024-02-07 14:21:11,084 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 14:21:11,084 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-02-07 14:21:11,084 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 151 flow [2024-02-07 14:21:11,085 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 14:21:11,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:11,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:11,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:21:11,085 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 14:21:11,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:11,086 INFO L85 PathProgramCache]: Analyzing trace with hash 600376683, now seen corresponding path program 1 times [2024-02-07 14:21:11,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:11,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536388093] [2024-02-07 14:21:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:11,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:11,119 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 14:21:11,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:11,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536388093] [2024-02-07 14:21:11,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536388093] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:11,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:11,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:11,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611048946] [2024-02-07 14:21:11,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:11,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:11,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:11,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:11,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:11,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:11,122 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 14:21:11,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:11,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:11,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:11,282 INFO L124 PetriNetUnfolderBase]: 1213/2076 cut-off events. [2024-02-07 14:21:11,282 INFO L125 PetriNetUnfolderBase]: For 956/956 co-relation queries the response was YES. [2024-02-07 14:21:11,285 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 14:21:11,294 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 63 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2024-02-07 14:21:11,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 405 flow [2024-02-07 14:21:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 14:21:11,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-02-07 14:21:11,295 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 151 flow. Second operand 4 states and 127 transitions. [2024-02-07 14:21:11,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 405 flow [2024-02-07 14:21:11,297 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 14:21:11,298 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 167 flow [2024-02-07 14:21:11,298 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 14:21:11,299 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-02-07 14:21:11,299 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 167 flow [2024-02-07 14:21:11,299 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 14:21:11,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:11,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:11,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:21:11,300 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 14:21:11,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash -813820632, now seen corresponding path program 1 times [2024-02-07 14:21:11,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:11,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42766126] [2024-02-07 14:21:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:11,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:11,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:11,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42766126] [2024-02-07 14:21:11,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42766126] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:11,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:11,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:21:11,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34747844] [2024-02-07 14:21:11,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:11,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:11,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:11,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:11,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:11,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 14:21:11,350 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 14:21:11,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:11,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 14:21:11,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:11,629 INFO L124 PetriNetUnfolderBase]: 2113/4332 cut-off events. [2024-02-07 14:21:11,630 INFO L125 PetriNetUnfolderBase]: For 2344/2344 co-relation queries the response was YES. [2024-02-07 14:21:11,636 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 14:21:11,658 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 80 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2024-02-07 14:21:11,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 535 flow [2024-02-07 14:21:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:21:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:21:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-02-07 14:21:11,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-02-07 14:21:11,660 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 167 flow. Second operand 5 states and 145 transitions. [2024-02-07 14:21:11,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 535 flow [2024-02-07 14:21:11,664 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 14:21:11,665 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 181 flow [2024-02-07 14:21:11,665 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 14:21:11,667 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2024-02-07 14:21:11,667 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 181 flow [2024-02-07 14:21:11,668 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 14:21:11,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:11,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:11,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:21:11,668 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 14:21:11,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:11,669 INFO L85 PathProgramCache]: Analyzing trace with hash 900956709, now seen corresponding path program 1 times [2024-02-07 14:21:11,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:11,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384230287] [2024-02-07 14:21:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:11,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:11,710 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 14:21:11,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:11,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384230287] [2024-02-07 14:21:11,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384230287] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:11,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:11,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:11,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093060392] [2024-02-07 14:21:11,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:11,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:11,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:11,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:11,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:11,715 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 14:21:11,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:11,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:11,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:11,922 INFO L124 PetriNetUnfolderBase]: 1647/2880 cut-off events. [2024-02-07 14:21:11,922 INFO L125 PetriNetUnfolderBase]: For 2184/2184 co-relation queries the response was YES. [2024-02-07 14:21:11,927 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 14:21:11,936 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 66 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2024-02-07 14:21:11,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 467 flow [2024-02-07 14:21:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 14:21:11,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-02-07 14:21:11,938 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 181 flow. Second operand 4 states and 127 transitions. [2024-02-07 14:21:11,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 467 flow [2024-02-07 14:21:11,941 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 14:21:11,942 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 189 flow [2024-02-07 14:21:11,942 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 14:21:11,944 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-02-07 14:21:11,944 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 189 flow [2024-02-07 14:21:11,944 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 14:21:11,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:11,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:11,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:21:11,945 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 14:21:11,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:11,945 INFO L85 PathProgramCache]: Analyzing trace with hash -397569460, now seen corresponding path program 1 times [2024-02-07 14:21:11,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:11,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468642650] [2024-02-07 14:21:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:11,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:12,010 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 14:21:12,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:12,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468642650] [2024-02-07 14:21:12,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468642650] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:12,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399793470] [2024-02-07 14:21:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:12,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:12,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:12,044 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 14:21:12,046 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 14:21:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:12,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:21:12,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:12,216 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 14:21:12,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:21:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399793470] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:12,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:21:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2024-02-07 14:21:12,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854859539] [2024-02-07 14:21:12,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:12,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:12,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:12,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:12,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:21:12,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 14:21:12,231 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 14:21:12,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:12,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 14:21:12,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:12,462 INFO L124 PetriNetUnfolderBase]: 1647/3425 cut-off events. [2024-02-07 14:21:12,463 INFO L125 PetriNetUnfolderBase]: For 2786/2786 co-relation queries the response was YES. [2024-02-07 14:21:12,468 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 14:21:12,478 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 46 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-02-07 14:21:12,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 343 flow [2024-02-07 14:21:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-02-07 14:21:12,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-02-07 14:21:12,480 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 189 flow. Second operand 4 states and 99 transitions. [2024-02-07 14:21:12,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 343 flow [2024-02-07 14:21:12,485 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 14:21:12,487 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 173 flow [2024-02-07 14:21:12,488 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 14:21:12,489 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-02-07 14:21:12,489 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 173 flow [2024-02-07 14:21:12,490 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 14:21:12,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:12,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:12,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 14:21:12,719 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 14:21:12,720 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 14:21:12,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:12,720 INFO L85 PathProgramCache]: Analyzing trace with hash 560248912, now seen corresponding path program 1 times [2024-02-07 14:21:12,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:12,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121859246] [2024-02-07 14:21:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:12,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:12,789 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 14:21:12,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:12,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121859246] [2024-02-07 14:21:12,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121859246] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:12,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529623442] [2024-02-07 14:21:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:12,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:12,792 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 14:21:12,817 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 14:21:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:12,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-07 14:21:12,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:12,946 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 14:21:12,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:21:12,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529623442] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:12,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:21:12,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 8 [2024-02-07 14:21:12,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011321562] [2024-02-07 14:21:12,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:12,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:21:12,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:12,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:21:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-02-07 14:21:12,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-02-07 14:21:12,954 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 14:21:12,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:12,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-02-07 14:21:12,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:13,239 INFO L124 PetriNetUnfolderBase]: 1647/3296 cut-off events. [2024-02-07 14:21:13,239 INFO L125 PetriNetUnfolderBase]: For 2325/2325 co-relation queries the response was YES. [2024-02-07 14:21:13,244 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 14:21:13,253 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 71 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-02-07 14:21:13,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 497 flow [2024-02-07 14:21:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:21:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:21:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-02-07 14:21:13,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-02-07 14:21:13,255 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 173 flow. Second operand 6 states and 139 transitions. [2024-02-07 14:21:13,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 497 flow [2024-02-07 14:21:13,261 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 14:21:13,262 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 168 flow [2024-02-07 14:21:13,262 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 14:21:13,262 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-02-07 14:21:13,262 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 168 flow [2024-02-07 14:21:13,262 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 14:21:13,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:13,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:13,277 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 14:21:13,474 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 14:21:13,475 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 14:21:13,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash 560249714, now seen corresponding path program 1 times [2024-02-07 14:21:13,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:13,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531631617] [2024-02-07 14:21:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:13,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:13,502 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 14:21:13,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:13,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531631617] [2024-02-07 14:21:13,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531631617] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:13,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813762439] [2024-02-07 14:21:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:13,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:13,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:13,521 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 14:21:13,521 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 14:21:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:13,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 14:21:13,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:13,608 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 14:21:13,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:13,656 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 14:21:13,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813762439] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:13,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:13,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-07 14:21:13,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925643084] [2024-02-07 14:21:13,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:13,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:21:13,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:13,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:21:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:21:13,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:21:13,661 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 14:21:13,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:13,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:21:13,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:13,892 INFO L124 PetriNetUnfolderBase]: 1991/3388 cut-off events. [2024-02-07 14:21:13,892 INFO L125 PetriNetUnfolderBase]: For 2832/2832 co-relation queries the response was YES. [2024-02-07 14:21:13,896 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 14:21:13,905 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 94 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2024-02-07 14:21:13,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 110 transitions, 646 flow [2024-02-07 14:21:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:21:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:21:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-02-07 14:21:13,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-02-07 14:21:13,907 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 168 flow. Second operand 6 states and 179 transitions. [2024-02-07 14:21:13,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 110 transitions, 646 flow [2024-02-07 14:21:13,910 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 14:21:13,911 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 195 flow [2024-02-07 14:21:13,911 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 14:21:13,912 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-02-07 14:21:13,912 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 195 flow [2024-02-07 14:21:13,912 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 14:21:13,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:13,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:13,938 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 14:21:14,124 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 14:21:14,124 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 14:21:14,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:14,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1018936604, now seen corresponding path program 1 times [2024-02-07 14:21:14,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:14,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494304640] [2024-02-07 14:21:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:14,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:14,153 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 14:21:14,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:14,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494304640] [2024-02-07 14:21:14,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494304640] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:14,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:14,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:14,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280474559] [2024-02-07 14:21:14,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:14,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:14,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:14,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:14,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:14,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:14,155 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 14:21:14,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:14,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:14,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:14,431 INFO L124 PetriNetUnfolderBase]: 2009/3483 cut-off events. [2024-02-07 14:21:14,432 INFO L125 PetriNetUnfolderBase]: For 4809/4809 co-relation queries the response was YES. [2024-02-07 14:21:14,437 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 14:21:14,448 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-02-07 14:21:14,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 547 flow [2024-02-07 14:21:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-02-07 14:21:14,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-02-07 14:21:14,450 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 195 flow. Second operand 4 states and 128 transitions. [2024-02-07 14:21:14,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 547 flow [2024-02-07 14:21:14,453 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 14:21:14,454 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 219 flow [2024-02-07 14:21:14,454 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 14:21:14,455 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2024-02-07 14:21:14,455 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 219 flow [2024-02-07 14:21:14,455 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 14:21:14,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:14,455 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:14,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 14:21:14,455 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 14:21:14,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:14,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1151039460, now seen corresponding path program 2 times [2024-02-07 14:21:14,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:14,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115794753] [2024-02-07 14:21:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:14,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:14,485 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 14:21:14,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115794753] [2024-02-07 14:21:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115794753] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:14,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:14,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:14,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377925779] [2024-02-07 14:21:14,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:14,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:14,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:21:14,488 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 14:21:14,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:14,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:21:14,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:14,726 INFO L124 PetriNetUnfolderBase]: 2029/3522 cut-off events. [2024-02-07 14:21:14,726 INFO L125 PetriNetUnfolderBase]: For 6210/6210 co-relation queries the response was YES. [2024-02-07 14:21:14,733 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 14:21:14,744 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 69 selfloop transitions, 4 changer transitions 3/88 dead transitions. [2024-02-07 14:21:14,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 537 flow [2024-02-07 14:21:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-02-07 14:21:14,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-02-07 14:21:14,746 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 219 flow. Second operand 4 states and 124 transitions. [2024-02-07 14:21:14,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 537 flow [2024-02-07 14:21:14,755 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 14:21:14,756 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 205 flow [2024-02-07 14:21:14,756 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 14:21:14,756 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-02-07 14:21:14,756 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 205 flow [2024-02-07 14:21:14,757 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 14:21:14,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:14,757 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:14,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 14:21:14,757 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 14:21:14,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:14,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1195539322, now seen corresponding path program 2 times [2024-02-07 14:21:14,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:14,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097308579] [2024-02-07 14:21:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:14,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:14,791 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 14:21:14,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:14,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097308579] [2024-02-07 14:21:14,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097308579] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:14,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:14,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:21:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047960205] [2024-02-07 14:21:14,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:14,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:14,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:14,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:21:14,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-02-07 14:21:14,800 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 14:21:14,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:14,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-02-07 14:21:14,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:15,006 INFO L124 PetriNetUnfolderBase]: 2065/3667 cut-off events. [2024-02-07 14:21:15,006 INFO L125 PetriNetUnfolderBase]: For 4082/4082 co-relation queries the response was YES. [2024-02-07 14:21:15,014 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 14:21:15,025 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 48 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-07 14:21:15,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 377 flow [2024-02-07 14:21:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-02-07 14:21:15,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-02-07 14:21:15,026 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 205 flow. Second operand 4 states and 89 transitions. [2024-02-07 14:21:15,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 377 flow [2024-02-07 14:21:15,032 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 14:21:15,033 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 205 flow [2024-02-07 14:21:15,033 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 14:21:15,034 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-02-07 14:21:15,034 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 205 flow [2024-02-07 14:21:15,034 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 14:21:15,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:15,034 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 14:21:15,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 14:21:15,034 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 14:21:15,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:15,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2137937304, now seen corresponding path program 1 times [2024-02-07 14:21:15,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:15,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335606830] [2024-02-07 14:21:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:15,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:15,067 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 14:21:15,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335606830] [2024-02-07 14:21:15,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335606830] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:15,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:21:15,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:21:15,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341868873] [2024-02-07 14:21:15,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:15,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:21:15,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:15,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:21:15,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:21:15,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:21:15,069 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 14:21:15,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:15,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:21:15,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:15,320 INFO L124 PetriNetUnfolderBase]: 1957/3505 cut-off events. [2024-02-07 14:21:15,320 INFO L125 PetriNetUnfolderBase]: For 3548/3548 co-relation queries the response was YES. [2024-02-07 14:21:15,326 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 14:21:15,335 INFO L140 encePairwiseOnDemand]: 47/49 looper letters, 48 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2024-02-07 14:21:15,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 373 flow [2024-02-07 14:21:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:21:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:21:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-02-07 14:21:15,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-02-07 14:21:15,336 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 205 flow. Second operand 3 states and 80 transitions. [2024-02-07 14:21:15,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 373 flow [2024-02-07 14:21:15,342 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 14:21:15,343 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 202 flow [2024-02-07 14:21:15,343 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 14:21:15,343 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2024-02-07 14:21:15,343 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 202 flow [2024-02-07 14:21:15,344 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 14:21:15,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:15,344 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 14:21:15,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 14:21:15,344 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 14:21:15,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1851546691, now seen corresponding path program 1 times [2024-02-07 14:21:15,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:15,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346457067] [2024-02-07 14:21:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:15,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:15,448 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 14:21:15,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:15,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346457067] [2024-02-07 14:21:15,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346457067] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:15,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789470941] [2024-02-07 14:21:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:15,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:15,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:15,464 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 14:21:15,491 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 14:21:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:15,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:21:15,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:15,562 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 14:21:15,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:15,612 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 14:21:15,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789470941] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:15,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:15,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-07 14:21:15,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89946261] [2024-02-07 14:21:15,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:15,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:21:15,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:15,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:21:15,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:21:15,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:21:15,624 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 14:21:15,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:15,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:21:15,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:16,197 INFO L124 PetriNetUnfolderBase]: 4981/7879 cut-off events. [2024-02-07 14:21:16,197 INFO L125 PetriNetUnfolderBase]: For 9497/9497 co-relation queries the response was YES. [2024-02-07 14:21:16,210 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 14:21:16,234 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 195 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2024-02-07 14:21:16,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 215 transitions, 1506 flow [2024-02-07 14:21:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:21:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:21:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-02-07 14:21:16,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576530612244898 [2024-02-07 14:21:16,236 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 202 flow. Second operand 12 states and 339 transitions. [2024-02-07 14:21:16,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 215 transitions, 1506 flow [2024-02-07 14:21:16,247 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 14:21:16,249 INFO L231 Difference]: Finished difference. Result has 85 places, 52 transitions, 309 flow [2024-02-07 14:21:16,249 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 14:21:16,249 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-02-07 14:21:16,250 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 52 transitions, 309 flow [2024-02-07 14:21:16,250 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 14:21:16,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:16,250 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 14:21:16,263 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 14:21:16,461 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 14:21:16,462 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 14:21:16,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash 758074797, now seen corresponding path program 2 times [2024-02-07 14:21:16,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:16,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070418587] [2024-02-07 14:21:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:16,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:16,604 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 14:21:16,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:16,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070418587] [2024-02-07 14:21:16,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070418587] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:16,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12591403] [2024-02-07 14:21:16,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:21:16,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:16,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:16,606 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 14:21:16,624 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 14:21:16,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 14:21:16,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:21:16,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:21:16,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:16,787 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 14:21:16,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:21:16,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12591403] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:21:16,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:21:16,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2024-02-07 14:21:16,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994934237] [2024-02-07 14:21:16,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:21:16,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:21:16,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:16,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:21:16,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:21:16,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-02-07 14:21:16,793 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 14:21:16,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:16,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-02-07 14:21:16,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:17,403 INFO L124 PetriNetUnfolderBase]: 4117/6907 cut-off events. [2024-02-07 14:21:17,403 INFO L125 PetriNetUnfolderBase]: For 12314/12314 co-relation queries the response was YES. [2024-02-07 14:21:17,419 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 14:21:17,440 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 69 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-02-07 14:21:17,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 593 flow [2024-02-07 14:21:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:21:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:21:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-02-07 14:21:17,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-02-07 14:21:17,441 INFO L175 Difference]: Start difference. First operand has 85 places, 52 transitions, 309 flow. Second operand 4 states and 94 transitions. [2024-02-07 14:21:17,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 593 flow [2024-02-07 14:21:17,458 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 14:21:17,459 INFO L231 Difference]: Finished difference. Result has 84 places, 51 transitions, 305 flow [2024-02-07 14:21:17,460 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 14:21:17,460 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2024-02-07 14:21:17,460 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 305 flow [2024-02-07 14:21:17,460 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 14:21:17,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:17,461 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 14:21:17,472 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 14:21:17,672 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 14:21:17,673 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 14:21:17,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1634551544, now seen corresponding path program 1 times [2024-02-07 14:21:17,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:17,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186059728] [2024-02-07 14:21:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:17,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:17,973 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 14:21:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:17,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186059728] [2024-02-07 14:21:17,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186059728] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:17,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208733818] [2024-02-07 14:21:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:17,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:17,975 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 14:21:18,001 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 14:21:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:18,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:21:18,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:18,106 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 14:21:18,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:18,231 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 14:21:18,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208733818] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:18,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:18,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2024-02-07 14:21:18,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594547588] [2024-02-07 14:21:18,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:18,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 14:21:18,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:18,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 14:21:18,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-02-07 14:21:18,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:21:18,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 305 flow. Second operand has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 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 14:21:18,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:18,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:21:18,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:21:19,337 INFO L124 PetriNetUnfolderBase]: 6709/10417 cut-off events. [2024-02-07 14:21:19,338 INFO L125 PetriNetUnfolderBase]: For 23105/23105 co-relation queries the response was YES. [2024-02-07 14:21:19,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35483 conditions, 10417 events. 6709/10417 cut-off events. For 23105/23105 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 49516 event pairs, 392 based on Foata normal form. 216/10574 useless extension candidates. Maximal degree in co-relation 35460. Up to 1121 conditions per place. [2024-02-07 14:21:19,394 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 263 selfloop transitions, 16 changer transitions 0/286 dead transitions. [2024-02-07 14:21:19,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 286 transitions, 2125 flow [2024-02-07 14:21:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:21:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:21:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 449 transitions. [2024-02-07 14:21:19,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727040816326531 [2024-02-07 14:21:19,396 INFO L175 Difference]: Start difference. First operand has 84 places, 51 transitions, 305 flow. Second operand 16 states and 449 transitions. [2024-02-07 14:21:19,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 286 transitions, 2125 flow [2024-02-07 14:21:19,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 286 transitions, 2122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:21:19,422 INFO L231 Difference]: Finished difference. Result has 102 places, 56 transitions, 414 flow [2024-02-07 14:21:19,423 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=16, PETRI_FLOW=414, PETRI_PLACES=102, PETRI_TRANSITIONS=56} [2024-02-07 14:21:19,423 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2024-02-07 14:21:19,423 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 56 transitions, 414 flow [2024-02-07 14:21:19,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.176470588235293) internal successors, (343), 17 states have internal predecessors, (343), 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 14:21:19,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:21:19,424 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:21:19,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-07 14:21:19,651 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 14:21:19,651 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 14:21:19,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:21:19,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1755986008, now seen corresponding path program 2 times [2024-02-07 14:21:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:21:19,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816511688] [2024-02-07 14:21:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:21:19,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:21:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:21:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:21,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:21:21,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816511688] [2024-02-07 14:21:21,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816511688] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:21:21,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195008462] [2024-02-07 14:21:21,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:21:21,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:21:21,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:21:21,529 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 14:21:21,540 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 14:21:21,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:21:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:21:21,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 50 conjunts are in the unsatisfiable core [2024-02-07 14:21:21,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:21:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 288 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:24,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:21:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:21:27,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195008462] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:21:27,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:21:27,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 132 [2024-02-07 14:21:27,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624540513] [2024-02-07 14:21:27,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:21:27,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-02-07 14:21:27,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:21:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-02-07 14:21:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1183, Invalid=16373, Unknown=0, NotChecked=0, Total=17556 [2024-02-07 14:21:28,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-02-07 14:21:28,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 56 transitions, 414 flow. Second operand has 133 states, 133 states have (on average 11.210526315789474) internal successors, (1491), 133 states have internal predecessors, (1491), 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 14:21:28,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:21:28,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-02-07 14:21:28,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand