./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-11.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_safe-11.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-11.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_safe-11.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 18:59:25,522 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 18:59:25,582 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 18:59:25,589 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 18:59:25,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 18:59:25,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 18:59:25,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 18:59:25,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 18:59:25,610 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 18:59:25,611 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 18:59:25,612 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 18:59:25,612 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 18:59:25,613 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 18:59:25,614 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 18:59:25,615 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 18:59:25,615 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 18:59:25,615 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 18:59:25,616 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 18:59:25,618 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 18:59:25,618 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 18:59:25,618 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 18:59:25,619 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 18:59:25,619 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 18:59:25,619 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 18:59:25,619 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 18:59:25,620 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 18:59:25,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 18:59:25,622 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 18:59:25,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 18:59:25,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 18:59:25,623 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 18:59:25,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 18:59:25,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 18:59:25,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 18:59:25,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 18:59:25,624 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 18:59:25,625 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 18:59:25,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 18:59:25,625 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 18:59:25,626 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 18:59:25,626 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 18:59:25,626 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 18:59:25,627 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 18:59:25,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 18:59:25,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 18:59:25,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 18:59:25,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 18:59:25,885 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 18:59:25,886 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 18:59:25,887 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-11.i [2024-02-07 18:59:27,254 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 18:59:27,600 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 18:59:27,601 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-11.i [2024-02-07 18:59:27,615 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7b2f001/e55f92153bce42dd9d06ddf5deea79d7/FLAG83ee63697 [2024-02-07 18:59:27,631 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7b2f001/e55f92153bce42dd9d06ddf5deea79d7 [2024-02-07 18:59:27,635 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 18:59:27,635 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 18:59:27,637 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_safe-11.yml/witness.yml [2024-02-07 18:59:27,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 18:59:27,726 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 18:59:27,737 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 18:59:27,738 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 18:59:27,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 18:59:27,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 06:59:27" (1/2) ... [2024-02-07 18:59:27,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ce61e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27, skipping insertion in model container [2024-02-07 18:59:27,743 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 06:59:27" (1/2) ... [2024-02-07 18:59:27,745 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@460f562f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27, skipping insertion in model container [2024-02-07 18:59:27,745 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 06:59:27" (2/2) ... [2024-02-07 18:59:27,745 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ce61e6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:27, skipping insertion in model container [2024-02-07 18:59:27,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 06:59:27" (2/2) ... [2024-02-07 18:59:27,746 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 18:59:27,797 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 18:59:27,799 INFO L76 edCorrectnessWitness]: Location invariant before [L708-L708] (0 <= prev) && (0 <= next) [2024-02-07 18:59:27,799 INFO L76 edCorrectnessWitness]: Location invariant before [L689-L689] (1 <= i) && (1 <= j) [2024-02-07 18:59:27,799 INFO L76 edCorrectnessWitness]: Location invariant before [L725-L725] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-02-07 18:59:27,799 INFO L76 edCorrectnessWitness]: Location invariant before [L710-L710] 0 <= prev [2024-02-07 18:59:27,799 INFO L76 edCorrectnessWitness]: Location invariant before [L697-L697] (1 <= i) && (1 <= j) [2024-02-07 18:59:27,800 INFO L76 edCorrectnessWitness]: Location invariant before [L681-L681] ((0 <= expression) && (expression <= 1)) && (expression == 0 || expression == 1) [2024-02-07 18:59:27,800 INFO L76 edCorrectnessWitness]: Location invariant before [L723-L723] 0 <= correct [2024-02-07 18:59:27,800 INFO L76 edCorrectnessWitness]: Location invariant before [L724-L724] (((1 <= i) && (1 <= j)) && (1 <= correct)) && (correct != 0) [2024-02-07 18:59:27,800 INFO L76 edCorrectnessWitness]: Location invariant before [L726-L726] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-02-07 18:59:27,800 INFO L76 edCorrectnessWitness]: Location invariant before [L698-L698] 2 <= j [2024-02-07 18:59:27,801 INFO L76 edCorrectnessWitness]: Location invariant before [L719-L719] j == 1 [2024-02-07 18:59:27,801 INFO L76 edCorrectnessWitness]: Location invariant before [L716-L716] i == 1 [2024-02-07 18:59:27,801 INFO L76 edCorrectnessWitness]: Location invariant after [L724-L724] (((1 <= i) && (1 <= j)) && (1 <= correct)) && (correct != 0) [2024-02-07 18:59:27,801 INFO L76 edCorrectnessWitness]: Location invariant before [L690-L690] 2 <= i [2024-02-07 18:59:27,801 INFO L76 edCorrectnessWitness]: Location invariant before [L706-L706] (0 <= cur) && (0 <= prev) [2024-02-07 18:59:27,801 INFO L76 edCorrectnessWitness]: Location invariant before [L707-L707] (0 <= cur) && (0 <= next) [2024-02-07 18:59:27,839 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 18:59:28,167 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-11.i[30241,30254] [2024-02-07 18:59:28,187 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 18:59:28,196 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 18:59:28,261 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-11.i[30241,30254] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 18:59:28,283 WARN L423 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-02-07 18:59:28,283 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 18:59:28,293 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 18:59:28,325 INFO L211 MainTranslator]: Completed translation [2024-02-07 18:59:28,326 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28 WrapperNode [2024-02-07 18:59:28,326 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 18:59:28,327 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 18:59:28,327 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 18:59:28,327 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 18:59:28,332 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,362 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,388 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2024-02-07 18:59:28,389 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 18:59:28,390 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 18:59:28,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 18:59:28,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 18:59:28,400 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,400 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,409 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,421 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 18:59:28,421 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,422 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,432 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,435 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,436 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,442 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,444 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 18:59:28,445 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 18:59:28,445 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 18:59:28,445 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 18:59:28,446 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 06:59:28" (1/1) ... [2024-02-07 18:59:28,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 18:59:28,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:28,520 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 18:59:28,595 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 18:59:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-07 18:59:28,629 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-07 18:59:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-07 18:59:28,629 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-07 18:59:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 18:59:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 18:59:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 18:59:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 18:59:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 18:59:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 18:59:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 18:59:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 18:59:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 18:59:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 18:59:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 18:59:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 18:59:28,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 18:59:28,632 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 18:59:28,761 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 18:59:28,763 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 18:59:28,950 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 18:59:28,950 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 18:59:29,014 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 18:59:29,015 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-07 18:59:29,015 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 06:59:29 BoogieIcfgContainer [2024-02-07 18:59:29,015 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 18:59:29,017 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 18:59:29,017 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 18:59:29,019 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 18:59:29,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 06:59:27" (1/4) ... [2024-02-07 18:59:29,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a35ef23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 06:59:29, skipping insertion in model container [2024-02-07 18:59:29,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 06:59:27" (2/4) ... [2024-02-07 18:59:29,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a35ef23 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 06:59:29, skipping insertion in model container [2024-02-07 18:59:29,021 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 06:59:28" (3/4) ... [2024-02-07 18:59:29,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a35ef23 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 06:59:29, skipping insertion in model container [2024-02-07 18:59:29,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 06:59:29" (4/4) ... [2024-02-07 18:59:29,022 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2024-02-07 18:59:29,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 18:59:29,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-02-07 18:59:29,036 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 18:59:29,064 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 18:59:29,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 49 transitions, 106 flow [2024-02-07 18:59:29,108 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-02-07 18:59:29,108 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 18:59:29,111 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 18:59:29,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 49 transitions, 106 flow [2024-02-07 18:59:29,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 47 transitions, 100 flow [2024-02-07 18:59:29,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 18:59:29,126 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;@61e3965d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 18:59:29,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 18:59:29,128 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 18:59:29,128 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 18:59:29,128 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 18:59:29,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:29,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 18:59:29,129 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 18:59:29,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash 9963, now seen corresponding path program 1 times [2024-02-07 18:59:29,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:29,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129409318] [2024-02-07 18:59:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:29,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:29,371 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 18:59:29,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:29,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129409318] [2024-02-07 18:59:29,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129409318] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:29,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:29,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 18:59:29,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565448644] [2024-02-07 18:59:29,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:29,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 18:59:29,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 18:59:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 18:59:29,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 18:59:29,414 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 18:59:29,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:29,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 18:59:29,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:29,602 INFO L124 PetriNetUnfolderBase]: 461/1017 cut-off events. [2024-02-07 18:59:29,603 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 18:59:29,607 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 18:59:29,615 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 26 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2024-02-07 18:59:29,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 140 flow [2024-02-07 18:59:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 18:59:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 18:59:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 66 transitions. [2024-02-07 18:59:29,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-02-07 18:59:29,640 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 100 flow. Second operand 2 states and 66 transitions. [2024-02-07 18:59:29,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 140 flow [2024-02-07 18:59:29,642 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 18:59:29,646 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 86 flow [2024-02-07 18:59:29,648 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 18:59:29,651 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-02-07 18:59:29,652 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 86 flow [2024-02-07 18:59:29,652 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 18:59:29,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:29,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:29,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 18:59:29,655 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 18:59:29,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash -939968002, now seen corresponding path program 1 times [2024-02-07 18:59:29,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:29,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777167145] [2024-02-07 18:59:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:29,803 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 18:59:29,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:29,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777167145] [2024-02-07 18:59:29,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777167145] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:29,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:29,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 18:59:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041366252] [2024-02-07 18:59:29,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:29,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:29,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:29,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 18:59:29,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 18:59:29,807 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 18:59:29,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:29,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 18:59:29,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:29,971 INFO L124 PetriNetUnfolderBase]: 825/1417 cut-off events. [2024-02-07 18:59:29,971 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 18:59:29,974 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 18:59:29,981 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 54 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2024-02-07 18:59:29,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 272 flow [2024-02-07 18:59:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 18:59:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 18:59:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-07 18:59:29,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581632653061225 [2024-02-07 18:59:29,983 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 86 flow. Second operand 4 states and 129 transitions. [2024-02-07 18:59:29,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 272 flow [2024-02-07 18:59:29,984 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 18:59:29,985 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 113 flow [2024-02-07 18:59:29,985 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 18:59:29,986 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-02-07 18:59:29,986 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 113 flow [2024-02-07 18:59:29,986 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 18:59:29,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:29,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:29,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 18:59:29,987 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 18:59:29,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1395258716, now seen corresponding path program 1 times [2024-02-07 18:59:29,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:29,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77941612] [2024-02-07 18:59:29,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:29,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:30,052 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 18:59:30,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:30,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77941612] [2024-02-07 18:59:30,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77941612] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:30,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:30,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 18:59:30,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588480082] [2024-02-07 18:59:30,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:30,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 18:59:30,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 18:59:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 18:59:30,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 18:59:30,061 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 18:59:30,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:30,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 18:59:30,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:30,299 INFO L124 PetriNetUnfolderBase]: 1635/3351 cut-off events. [2024-02-07 18:59:30,300 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2024-02-07 18:59:30,304 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 18:59:30,319 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 49 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-02-07 18:59:30,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 271 flow [2024-02-07 18:59:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 18:59:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 18:59:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-02-07 18:59:30,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-02-07 18:59:30,321 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 113 flow. Second operand 3 states and 92 transitions. [2024-02-07 18:59:30,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 271 flow [2024-02-07 18:59:30,322 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 18:59:30,323 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 127 flow [2024-02-07 18:59:30,324 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 18:59:30,324 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-02-07 18:59:30,324 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 127 flow [2024-02-07 18:59:30,325 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 18:59:30,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:30,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:30,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 18:59:30,325 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 18:59:30,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:30,326 INFO L85 PathProgramCache]: Analyzing trace with hash -303346952, now seen corresponding path program 1 times [2024-02-07 18:59:30,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:30,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014813978] [2024-02-07 18:59:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:30,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:30,387 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 18:59:30,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:30,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014813978] [2024-02-07 18:59:30,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014813978] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:30,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:30,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 18:59:30,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459431864] [2024-02-07 18:59:30,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:30,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:30,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:30,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:30,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 18:59:30,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-02-07 18:59:30,397 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 18:59:30,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:30,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-02-07 18:59:30,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:30,687 INFO L124 PetriNetUnfolderBase]: 1815/3600 cut-off events. [2024-02-07 18:59:30,687 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-02-07 18:59:30,695 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 18:59:30,713 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-02-07 18:59:30,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 425 flow [2024-02-07 18:59:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 18:59:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 18:59:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-02-07 18:59:30,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563265306122449 [2024-02-07 18:59:30,715 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 127 flow. Second operand 5 states and 138 transitions. [2024-02-07 18:59:30,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 425 flow [2024-02-07 18:59:30,717 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 18:59:30,718 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 149 flow [2024-02-07 18:59:30,718 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 18:59:30,719 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2024-02-07 18:59:30,719 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 149 flow [2024-02-07 18:59:30,719 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 18:59:30,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:30,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:30,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 18:59:30,720 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 18:59:30,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash -303346150, now seen corresponding path program 1 times [2024-02-07 18:59:30,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:30,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74144412] [2024-02-07 18:59:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:30,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:30,751 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 18:59:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74144412] [2024-02-07 18:59:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74144412] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:30,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:30,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 18:59:30,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539057363] [2024-02-07 18:59:30,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:30,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 18:59:30,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:30,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 18:59:30,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 18:59:30,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 18:59:30,755 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 18:59:30,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:30,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 18:59:30,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:30,963 INFO L124 PetriNetUnfolderBase]: 1095/2324 cut-off events. [2024-02-07 18:59:30,963 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2024-02-07 18:59:30,968 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 18:59:30,978 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 43 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-07 18:59:30,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 281 flow [2024-02-07 18:59:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 18:59:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 18:59:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-02-07 18:59:30,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-02-07 18:59:30,981 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 149 flow. Second operand 3 states and 91 transitions. [2024-02-07 18:59:30,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 281 flow [2024-02-07 18:59:30,984 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 18:59:30,985 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 151 flow [2024-02-07 18:59:30,985 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 18:59:30,986 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-02-07 18:59:30,986 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 151 flow [2024-02-07 18:59:30,986 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 18:59:30,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:30,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:30,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 18:59:30,987 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 18:59:30,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:30,988 INFO L85 PathProgramCache]: Analyzing trace with hash 600376683, now seen corresponding path program 1 times [2024-02-07 18:59:30,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:30,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808948794] [2024-02-07 18:59:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:30,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:31,029 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 18:59:31,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:31,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808948794] [2024-02-07 18:59:31,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808948794] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:31,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:31,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 18:59:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138637564] [2024-02-07 18:59:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:31,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:31,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 18:59:31,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 18:59:31,033 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 18:59:31,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:31,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 18:59:31,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:31,223 INFO L124 PetriNetUnfolderBase]: 1213/2076 cut-off events. [2024-02-07 18:59:31,223 INFO L125 PetriNetUnfolderBase]: For 956/956 co-relation queries the response was YES. [2024-02-07 18:59:31,228 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 18:59:31,239 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 63 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2024-02-07 18:59:31,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 405 flow [2024-02-07 18:59:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 18:59:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 18:59:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 18:59:31,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-02-07 18:59:31,241 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 151 flow. Second operand 4 states and 127 transitions. [2024-02-07 18:59:31,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 405 flow [2024-02-07 18:59:31,243 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 18:59:31,244 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 167 flow [2024-02-07 18:59:31,244 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 18:59:31,245 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-02-07 18:59:31,245 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 167 flow [2024-02-07 18:59:31,245 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 18:59:31,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:31,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:31,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 18:59:31,246 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 18:59:31,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash -813820632, now seen corresponding path program 1 times [2024-02-07 18:59:31,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:31,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265517292] [2024-02-07 18:59:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:31,299 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 18:59:31,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:31,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265517292] [2024-02-07 18:59:31,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265517292] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:31,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:31,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 18:59:31,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937631858] [2024-02-07 18:59:31,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:31,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:31,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:31,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 18:59:31,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 18:59:31,309 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 18:59:31,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:31,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 18:59:31,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:31,705 INFO L124 PetriNetUnfolderBase]: 2113/4332 cut-off events. [2024-02-07 18:59:31,705 INFO L125 PetriNetUnfolderBase]: For 2344/2344 co-relation queries the response was YES. [2024-02-07 18:59:31,720 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 18:59:31,744 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 80 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2024-02-07 18:59:31,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 535 flow [2024-02-07 18:59:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 18:59:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 18:59:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-02-07 18:59:31,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-02-07 18:59:31,746 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 167 flow. Second operand 5 states and 145 transitions. [2024-02-07 18:59:31,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 535 flow [2024-02-07 18:59:31,750 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 18:59:31,752 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 181 flow [2024-02-07 18:59:31,753 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 18:59:31,753 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2024-02-07 18:59:31,753 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 181 flow [2024-02-07 18:59:31,754 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 18:59:31,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:31,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:31,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 18:59:31,754 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 18:59:31,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:31,755 INFO L85 PathProgramCache]: Analyzing trace with hash 900956709, now seen corresponding path program 1 times [2024-02-07 18:59:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:31,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098076111] [2024-02-07 18:59:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:31,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:31,799 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 18:59:31,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:31,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098076111] [2024-02-07 18:59:31,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098076111] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:31,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:31,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 18:59:31,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721086501] [2024-02-07 18:59:31,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:31,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:31,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:31,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 18:59:31,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 18:59:31,802 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 18:59:31,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:31,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 18:59:31,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:32,100 INFO L124 PetriNetUnfolderBase]: 1647/2880 cut-off events. [2024-02-07 18:59:32,100 INFO L125 PetriNetUnfolderBase]: For 2184/2184 co-relation queries the response was YES. [2024-02-07 18:59:32,108 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 18:59:32,121 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 66 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2024-02-07 18:59:32,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 467 flow [2024-02-07 18:59:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 18:59:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 18:59:32,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 18:59:32,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-02-07 18:59:32,123 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 181 flow. Second operand 4 states and 127 transitions. [2024-02-07 18:59:32,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 467 flow [2024-02-07 18:59:32,125 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 18:59:32,126 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 189 flow [2024-02-07 18:59:32,127 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 18:59:32,128 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-02-07 18:59:32,128 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 189 flow [2024-02-07 18:59:32,128 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 18:59:32,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:32,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:32,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 18:59:32,129 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 18:59:32,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash -397569460, now seen corresponding path program 1 times [2024-02-07 18:59:32,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534268715] [2024-02-07 18:59:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:32,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:32,192 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 18:59:32,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:32,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534268715] [2024-02-07 18:59:32,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534268715] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:32,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611087601] [2024-02-07 18:59:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:32,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:32,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:32,228 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 18:59:32,295 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 18:59:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:32,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 18:59:32,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:32,439 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 18:59:32,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 18:59:32,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611087601] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:32,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 18:59:32,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2024-02-07 18:59:32,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046522544] [2024-02-07 18:59:32,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:32,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:32,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:32,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:32,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-02-07 18:59:32,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 18:59:32,454 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 18:59:32,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:32,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 18:59:32,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:32,802 INFO L124 PetriNetUnfolderBase]: 1647/3425 cut-off events. [2024-02-07 18:59:32,802 INFO L125 PetriNetUnfolderBase]: For 2786/2786 co-relation queries the response was YES. [2024-02-07 18:59:32,814 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 18:59:32,829 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 46 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-02-07 18:59:32,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 343 flow [2024-02-07 18:59:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 18:59:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 18:59:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-02-07 18:59:32,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-02-07 18:59:32,831 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 189 flow. Second operand 4 states and 99 transitions. [2024-02-07 18:59:32,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 343 flow [2024-02-07 18:59:32,837 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 18:59:32,839 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 173 flow [2024-02-07 18:59:32,840 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 18:59:32,841 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-02-07 18:59:32,841 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 173 flow [2024-02-07 18:59:32,841 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 18:59:32,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:32,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:32,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:33,055 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 18:59:33,055 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 18:59:33,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:33,056 INFO L85 PathProgramCache]: Analyzing trace with hash 560248912, now seen corresponding path program 1 times [2024-02-07 18:59:33,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:33,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717301217] [2024-02-07 18:59:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:33,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:33,131 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 18:59:33,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:33,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717301217] [2024-02-07 18:59:33,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717301217] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:33,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003600997] [2024-02-07 18:59:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:33,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:33,153 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 18:59:33,200 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 18:59:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:33,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-07 18:59:33,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:33,325 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 18:59:33,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 18:59:33,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003600997] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:33,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 18:59:33,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 8 [2024-02-07 18:59:33,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31329131] [2024-02-07 18:59:33,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:33,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 18:59:33,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 18:59:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-02-07 18:59:33,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-02-07 18:59:33,335 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 18:59:33,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:33,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-02-07 18:59:33,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:33,715 INFO L124 PetriNetUnfolderBase]: 1647/3296 cut-off events. [2024-02-07 18:59:33,715 INFO L125 PetriNetUnfolderBase]: For 2325/2325 co-relation queries the response was YES. [2024-02-07 18:59:33,723 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 18:59:33,735 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 71 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-02-07 18:59:33,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 497 flow [2024-02-07 18:59:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 18:59:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 18:59:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-02-07 18:59:33,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-02-07 18:59:33,737 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 173 flow. Second operand 6 states and 139 transitions. [2024-02-07 18:59:33,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 497 flow [2024-02-07 18:59:33,742 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 18:59:33,744 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 168 flow [2024-02-07 18:59:33,744 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 18:59:33,745 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-02-07 18:59:33,745 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 168 flow [2024-02-07 18:59:33,745 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 18:59:33,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:33,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:33,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-07 18:59:33,959 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 18:59:33,959 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 18:59:33,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:33,960 INFO L85 PathProgramCache]: Analyzing trace with hash 560249714, now seen corresponding path program 1 times [2024-02-07 18:59:33,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:33,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175215823] [2024-02-07 18:59:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:33,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:33,988 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 18:59:33,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175215823] [2024-02-07 18:59:33,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175215823] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991924721] [2024-02-07 18:59:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:33,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:33,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:34,005 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 18:59:34,033 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 18:59:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:34,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 18:59:34,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:34,140 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 18:59:34,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:34,157 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 18:59:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991924721] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:34,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:34,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-07 18:59:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190826785] [2024-02-07 18:59:34,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:34,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 18:59:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 18:59:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-07 18:59:34,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 18:59:34,164 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 18:59:34,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:34,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 18:59:34,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:34,479 INFO L124 PetriNetUnfolderBase]: 1991/3388 cut-off events. [2024-02-07 18:59:34,480 INFO L125 PetriNetUnfolderBase]: For 2832/2832 co-relation queries the response was YES. [2024-02-07 18:59:34,494 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 18:59:34,509 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 94 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2024-02-07 18:59:34,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 110 transitions, 646 flow [2024-02-07 18:59:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 18:59:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 18:59:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-02-07 18:59:34,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-02-07 18:59:34,511 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 168 flow. Second operand 6 states and 179 transitions. [2024-02-07 18:59:34,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 110 transitions, 646 flow [2024-02-07 18:59:34,516 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 18:59:34,517 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 195 flow [2024-02-07 18:59:34,517 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 18:59:34,518 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-02-07 18:59:34,518 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 195 flow [2024-02-07 18:59:34,518 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 18:59:34,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:34,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:34,706 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 18:59:34,729 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 18:59:34,730 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 18:59:34,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:34,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1018936604, now seen corresponding path program 1 times [2024-02-07 18:59:34,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:34,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984927815] [2024-02-07 18:59:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:34,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:34,764 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 18:59:34,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:34,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984927815] [2024-02-07 18:59:34,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984927815] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:34,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:34,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 18:59:34,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781244207] [2024-02-07 18:59:34,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:34,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:34,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:34,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:34,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 18:59:34,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 18:59:34,768 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 18:59:34,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:34,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 18:59:34,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:35,099 INFO L124 PetriNetUnfolderBase]: 2009/3483 cut-off events. [2024-02-07 18:59:35,100 INFO L125 PetriNetUnfolderBase]: For 4809/4809 co-relation queries the response was YES. [2024-02-07 18:59:35,110 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 18:59:35,131 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-02-07 18:59:35,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 547 flow [2024-02-07 18:59:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 18:59:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 18:59:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-02-07 18:59:35,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-02-07 18:59:35,133 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 195 flow. Second operand 4 states and 128 transitions. [2024-02-07 18:59:35,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 547 flow [2024-02-07 18:59:35,140 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 18:59:35,141 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 219 flow [2024-02-07 18:59:35,142 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 18:59:35,144 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2024-02-07 18:59:35,144 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 219 flow [2024-02-07 18:59:35,144 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 18:59:35,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:35,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:35,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 18:59:35,145 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 18:59:35,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1151039460, now seen corresponding path program 2 times [2024-02-07 18:59:35,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:35,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590275764] [2024-02-07 18:59:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:35,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:35,188 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 18:59:35,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:35,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590275764] [2024-02-07 18:59:35,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590275764] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:35,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:35,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 18:59:35,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357406007] [2024-02-07 18:59:35,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:35,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:35,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 18:59:35,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 18:59:35,193 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 18:59:35,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:35,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 18:59:35,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:35,458 INFO L124 PetriNetUnfolderBase]: 2029/3522 cut-off events. [2024-02-07 18:59:35,459 INFO L125 PetriNetUnfolderBase]: For 6210/6210 co-relation queries the response was YES. [2024-02-07 18:59:35,472 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 18:59:35,487 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 69 selfloop transitions, 4 changer transitions 3/88 dead transitions. [2024-02-07 18:59:35,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 537 flow [2024-02-07 18:59:35,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 18:59:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 18:59:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-02-07 18:59:35,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-02-07 18:59:35,489 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 219 flow. Second operand 4 states and 124 transitions. [2024-02-07 18:59:35,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 537 flow [2024-02-07 18:59:35,500 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 18:59:35,501 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 205 flow [2024-02-07 18:59:35,501 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 18:59:35,502 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-02-07 18:59:35,502 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 205 flow [2024-02-07 18:59:35,502 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 18:59:35,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:35,503 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:35,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 18:59:35,503 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 18:59:35,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1195539322, now seen corresponding path program 2 times [2024-02-07 18:59:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:35,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762613511] [2024-02-07 18:59:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:35,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:35,556 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 18:59:35,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:35,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762613511] [2024-02-07 18:59:35,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762613511] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:35,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:35,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 18:59:35,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592340665] [2024-02-07 18:59:35,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:35,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:35,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:35,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 18:59:35,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-02-07 18:59:35,567 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 18:59:35,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:35,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-02-07 18:59:35,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:35,839 INFO L124 PetriNetUnfolderBase]: 2065/3667 cut-off events. [2024-02-07 18:59:35,840 INFO L125 PetriNetUnfolderBase]: For 4082/4082 co-relation queries the response was YES. [2024-02-07 18:59:35,854 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 18:59:35,869 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 48 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-07 18:59:35,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 377 flow [2024-02-07 18:59:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 18:59:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 18:59:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-02-07 18:59:35,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-02-07 18:59:35,871 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 205 flow. Second operand 4 states and 89 transitions. [2024-02-07 18:59:35,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 377 flow [2024-02-07 18:59:35,877 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 18:59:35,878 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 205 flow [2024-02-07 18:59:35,879 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 18:59:35,879 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-02-07 18:59:35,880 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 205 flow [2024-02-07 18:59:35,880 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 18:59:35,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:35,880 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 18:59:35,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 18:59:35,881 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 18:59:35,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2137937304, now seen corresponding path program 1 times [2024-02-07 18:59:35,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:35,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474291931] [2024-02-07 18:59:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:35,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:35,930 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 18:59:35,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:35,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474291931] [2024-02-07 18:59:35,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474291931] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:35,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:35,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 18:59:35,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453153898] [2024-02-07 18:59:35,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:35,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 18:59:35,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:35,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 18:59:35,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 18:59:35,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 18:59:35,933 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 18:59:35,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:35,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 18:59:35,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:36,172 INFO L124 PetriNetUnfolderBase]: 1957/3505 cut-off events. [2024-02-07 18:59:36,173 INFO L125 PetriNetUnfolderBase]: For 3548/3548 co-relation queries the response was YES. [2024-02-07 18:59:36,186 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 18:59:36,198 INFO L140 encePairwiseOnDemand]: 47/49 looper letters, 48 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2024-02-07 18:59:36,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 373 flow [2024-02-07 18:59:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 18:59:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 18:59:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-02-07 18:59:36,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-02-07 18:59:36,200 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 205 flow. Second operand 3 states and 80 transitions. [2024-02-07 18:59:36,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 373 flow [2024-02-07 18:59:36,210 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 18:59:36,211 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 202 flow [2024-02-07 18:59:36,211 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 18:59:36,212 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2024-02-07 18:59:36,212 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 202 flow [2024-02-07 18:59:36,213 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 18:59:36,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:36,213 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 18:59:36,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 18:59:36,213 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 18:59:36,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:36,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1851546691, now seen corresponding path program 1 times [2024-02-07 18:59:36,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:36,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165949293] [2024-02-07 18:59:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:36,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:36,301 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 18:59:36,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165949293] [2024-02-07 18:59:36,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165949293] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610890914] [2024-02-07 18:59:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:36,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:36,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:36,346 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 18:59:36,368 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 18:59:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:36,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 18:59:36,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:36,448 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 18:59:36,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:36,498 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 18:59:36,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610890914] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:36,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:36,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-07 18:59:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903099857] [2024-02-07 18:59:36,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:36,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 18:59:36,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 18:59:36,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 18:59:36,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 18:59:36,510 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 18:59:36,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:36,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 18:59:36,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:37,288 INFO L124 PetriNetUnfolderBase]: 4981/7879 cut-off events. [2024-02-07 18:59:37,289 INFO L125 PetriNetUnfolderBase]: For 9497/9497 co-relation queries the response was YES. [2024-02-07 18:59:37,307 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 18:59:37,332 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 195 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2024-02-07 18:59:37,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 215 transitions, 1506 flow [2024-02-07 18:59:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 18:59:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 18:59:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-02-07 18:59:37,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576530612244898 [2024-02-07 18:59:37,335 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 202 flow. Second operand 12 states and 339 transitions. [2024-02-07 18:59:37,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 215 transitions, 1506 flow [2024-02-07 18:59:37,345 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 18:59:37,347 INFO L231 Difference]: Finished difference. Result has 85 places, 52 transitions, 309 flow [2024-02-07 18:59:37,347 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 18:59:37,347 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-02-07 18:59:37,348 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 52 transitions, 309 flow [2024-02-07 18:59:37,348 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 18:59:37,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:37,348 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 18:59:37,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-07 18:59:37,562 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 18:59:37,563 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 18:59:37,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:37,563 INFO L85 PathProgramCache]: Analyzing trace with hash 758074797, now seen corresponding path program 2 times [2024-02-07 18:59:37,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:37,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857648578] [2024-02-07 18:59:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:37,728 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 18:59:37,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:37,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857648578] [2024-02-07 18:59:37,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857648578] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:37,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823937908] [2024-02-07 18:59:37,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 18:59:37,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:37,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:37,739 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 18:59:37,740 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 18:59:37,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 18:59:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:37,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 18:59:37,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:37,909 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 18:59:37,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 18:59:37,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823937908] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:37,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 18:59:37,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2024-02-07 18:59:37,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610254908] [2024-02-07 18:59:37,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:37,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:37,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:37,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:37,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2024-02-07 18:59:37,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-02-07 18:59:37,917 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 18:59:37,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:37,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-02-07 18:59:37,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:38,727 INFO L124 PetriNetUnfolderBase]: 4117/6907 cut-off events. [2024-02-07 18:59:38,728 INFO L125 PetriNetUnfolderBase]: For 12314/12314 co-relation queries the response was YES. [2024-02-07 18:59:38,761 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 18:59:38,793 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 69 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-02-07 18:59:38,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 593 flow [2024-02-07 18:59:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 18:59:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 18:59:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-02-07 18:59:38,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-02-07 18:59:38,795 INFO L175 Difference]: Start difference. First operand has 85 places, 52 transitions, 309 flow. Second operand 4 states and 94 transitions. [2024-02-07 18:59:38,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 593 flow [2024-02-07 18:59:38,818 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 18:59:38,819 INFO L231 Difference]: Finished difference. Result has 84 places, 51 transitions, 305 flow [2024-02-07 18:59:38,820 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 18:59:38,820 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2024-02-07 18:59:38,820 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 305 flow [2024-02-07 18:59:38,820 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 18:59:38,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:38,821 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 18:59:38,836 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 18:59:39,033 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 18:59:39,034 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 18:59:39,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1634551544, now seen corresponding path program 1 times [2024-02-07 18:59:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:39,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277221950] [2024-02-07 18:59:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:39,228 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 18:59:39,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:39,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277221950] [2024-02-07 18:59:39,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277221950] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:39,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425531674] [2024-02-07 18:59:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:39,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:39,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:39,231 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 18:59:39,252 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 18:59:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:39,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 18:59:39,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:39,481 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 18:59:39,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:39,699 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 18:59:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425531674] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:39,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:39,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-02-07 18:59:39,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349538673] [2024-02-07 18:59:39,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:39,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-07 18:59:39,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:39,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-07 18:59:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-02-07 18:59:39,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 18:59:39,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 305 flow. Second operand has 25 states, 25 states have (on average 19.96) internal successors, (499), 25 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:39,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:39,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 18:59:39,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:42,573 INFO L124 PetriNetUnfolderBase]: 10165/15601 cut-off events. [2024-02-07 18:59:42,573 INFO L125 PetriNetUnfolderBase]: For 44273/44273 co-relation queries the response was YES. [2024-02-07 18:59:42,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54203 conditions, 15601 events. 10165/15601 cut-off events. For 44273/44273 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 73341 event pairs, 392 based on Foata normal form. 648/16190 useless extension candidates. Maximal degree in co-relation 54180. Up to 1697 conditions per place. [2024-02-07 18:59:42,684 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 399 selfloop transitions, 24 changer transitions 0/430 dead transitions. [2024-02-07 18:59:42,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 430 transitions, 3245 flow [2024-02-07 18:59:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-07 18:59:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-07 18:59:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 681 transitions. [2024-02-07 18:59:42,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790816326530612 [2024-02-07 18:59:42,687 INFO L175 Difference]: Start difference. First operand has 84 places, 51 transitions, 305 flow. Second operand 24 states and 681 transitions. [2024-02-07 18:59:42,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 430 transitions, 3245 flow [2024-02-07 18:59:42,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 430 transitions, 3242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 18:59:42,724 INFO L231 Difference]: Finished difference. Result has 118 places, 64 transitions, 558 flow [2024-02-07 18:59:42,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=558, PETRI_PLACES=118, PETRI_TRANSITIONS=64} [2024-02-07 18:59:42,725 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-02-07 18:59:42,725 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 64 transitions, 558 flow [2024-02-07 18:59:42,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 19.96) internal successors, (499), 25 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:42,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:42,726 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:42,751 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 18:59:42,950 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 18:59:42,951 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 18:59:42,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:42,951 INFO L85 PathProgramCache]: Analyzing trace with hash -28826392, now seen corresponding path program 2 times [2024-02-07 18:59:42,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:42,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626596155] [2024-02-07 18:59:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:42,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:43,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:43,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626596155] [2024-02-07 18:59:43,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626596155] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:43,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632544577] [2024-02-07 18:59:43,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 18:59:43,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:43,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:43,713 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 18:59:43,720 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 18:59:43,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 18:59:43,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:43,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-07 18:59:43,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:44,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:44,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632544577] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:44,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:44,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2024-02-07 18:59:44,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113219685] [2024-02-07 18:59:44,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:44,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-02-07 18:59:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-02-07 18:59:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2024-02-07 18:59:44,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 18:59:44,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 64 transitions, 558 flow. Second operand has 27 states, 27 states have (on average 20.11111111111111) internal successors, (543), 27 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:44,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:44,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 18:59:44,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:47,608 INFO L124 PetriNetUnfolderBase]: 11029/16897 cut-off events. [2024-02-07 18:59:47,612 INFO L125 PetriNetUnfolderBase]: For 65513/65513 co-relation queries the response was YES. [2024-02-07 18:59:47,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62515 conditions, 16897 events. 11029/16897 cut-off events. For 65513/65513 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 79335 event pairs, 392 based on Foata normal form. 108/16946 useless extension candidates. Maximal degree in co-relation 62480. Up to 1841 conditions per place. [2024-02-07 18:59:47,841 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 433 selfloop transitions, 26 changer transitions 0/466 dead transitions. [2024-02-07 18:59:47,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 466 transitions, 3662 flow [2024-02-07 18:59:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-07 18:59:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-07 18:59:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 727 transitions. [2024-02-07 18:59:47,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706436420722135 [2024-02-07 18:59:47,849 INFO L175 Difference]: Start difference. First operand has 118 places, 64 transitions, 558 flow. Second operand 26 states and 727 transitions. [2024-02-07 18:59:47,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 466 transitions, 3662 flow [2024-02-07 18:59:48,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 466 transitions, 3644 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-02-07 18:59:48,048 INFO L231 Difference]: Finished difference. Result has 137 places, 67 transitions, 652 flow [2024-02-07 18:59:48,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=652, PETRI_PLACES=137, PETRI_TRANSITIONS=67} [2024-02-07 18:59:48,049 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 87 predicate places. [2024-02-07 18:59:48,049 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 67 transitions, 652 flow [2024-02-07 18:59:48,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 20.11111111111111) internal successors, (543), 27 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:48,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:48,049 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:48,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:48,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:48,270 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 18:59:48,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash 349041720, now seen corresponding path program 3 times [2024-02-07 18:59:48,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:48,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026417079] [2024-02-07 18:59:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:48,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:53,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:53,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026417079] [2024-02-07 18:59:53,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026417079] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:53,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484271718] [2024-02-07 18:59:53,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 18:59:53,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:53,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:53,328 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 18:59:53,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 18:59:53,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-02-07 18:59:53,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:53,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 80 conjunts are in the unsatisfiable core [2024-02-07 18:59:53,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:00:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 968 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:00:00,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:00:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:00:10,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484271718] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:00:10,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:00:10,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 225 [2024-02-07 19:00:10,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139972337] [2024-02-07 19:00:10,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:00:10,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 226 states [2024-02-07 19:00:10,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:00:10,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2024-02-07 19:00:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3089, Invalid=47761, Unknown=0, NotChecked=0, Total=50850 [2024-02-07 19:00:11,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 49 [2024-02-07 19:00:11,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 67 transitions, 652 flow. Second operand has 226 states, 226 states have (on average 10.128318584070797) internal successors, (2289), 226 states have internal predecessors, (2289), 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 19:00:11,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:00:11,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 49 [2024-02-07 19:00:11,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand