./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-12.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_unsafe-12.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-12.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_unsafe-12.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:43:33,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:43:33,981 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:43:33,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:43:33,988 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:43:34,020 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:43:34,022 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:43:34,022 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:43:34,023 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:43:34,026 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:43:34,027 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:43:34,027 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:43:34,028 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:43:34,029 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:43:34,029 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:43:34,030 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:43:34,030 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:43:34,030 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:43:34,030 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:43:34,031 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:43:34,031 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:43:34,031 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:43:34,032 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:43:34,032 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:43:34,032 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:43:34,032 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:43:34,033 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:43:34,033 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:43:34,034 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:43:34,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:43:34,035 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:43:34,035 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:43:34,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:43:34,035 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:43:34,036 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:43:34,036 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:43:34,036 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:43:34,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:43:34,037 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:43:34,044 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:43:34,045 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:43:34,045 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:43:34,045 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:43:34,045 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:43:34,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:43:34,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:43:34,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:43:34,365 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:43:34,368 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:43:34,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-12.i [2024-02-07 14:43:35,535 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:43:35,825 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:43:35,826 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-12.i [2024-02-07 14:43:35,839 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23d7460ae/ec73336f85924c5d86894ff71ca1f36d/FLAG3072cd0da [2024-02-07 14:43:35,851 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23d7460ae/ec73336f85924c5d86894ff71ca1f36d [2024-02-07 14:43:35,853 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:43:35,854 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:43:35,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/fib_unsafe-12.yml/witness.yml [2024-02-07 14:43:35,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:43:35,975 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:43:35,976 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:43:35,977 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:43:35,981 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:43:35,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:43:35" (1/2) ... [2024-02-07 14:43:35,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da4ba55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:35, skipping insertion in model container [2024-02-07 14:43:35,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:43:35" (1/2) ... [2024-02-07 14:43:35,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2141733a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:35, skipping insertion in model container [2024-02-07 14:43:35,986 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:43:35" (2/2) ... [2024-02-07 14:43:35,986 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da4ba55 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:35, skipping insertion in model container [2024-02-07 14:43:35,987 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:43:35" (2/2) ... [2024-02-07 14:43:35,987 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:43:36,048 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:43:36,050 INFO L76 edCorrectnessWitness]: Location invariant before [L690-L690] 2 <= i [2024-02-07 14:43:36,050 INFO L76 edCorrectnessWitness]: Location invariant before [L716-L716] i == 1 [2024-02-07 14:43:36,050 INFO L76 edCorrectnessWitness]: Location invariant before [L698-L698] 2 <= j [2024-02-07 14:43:36,050 INFO L76 edCorrectnessWitness]: Location invariant before [L723-L723] 0 <= correct [2024-02-07 14:43:36,050 INFO L76 edCorrectnessWitness]: Location invariant before [L719-L719] j == 1 [2024-02-07 14:43:36,051 INFO L76 edCorrectnessWitness]: Location invariant before [L706-L706] (0 <= cur) && (0 <= prev) [2024-02-07 14:43:36,051 INFO L76 edCorrectnessWitness]: Location invariant before [L725-L725] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-02-07 14:43:36,051 INFO L76 edCorrectnessWitness]: Location invariant before [L726-L726] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-02-07 14:43:36,052 INFO L76 edCorrectnessWitness]: Location invariant before [L708-L708] (0 <= prev) && (0 <= next) [2024-02-07 14:43:36,052 INFO L76 edCorrectnessWitness]: Location invariant before [L697-L697] (1 <= i) && (1 <= j) [2024-02-07 14:43:36,052 INFO L76 edCorrectnessWitness]: Location invariant after [L724-L724] ((((1 <= i) && (1 <= j)) && (2 <= correct)) && (i <= 2147483646)) && (correct != 0) [2024-02-07 14:43:36,052 INFO L76 edCorrectnessWitness]: Location invariant before [L681-L681] ((0 <= expression) && (expression <= 1)) && (expression == 0 || expression == 1) [2024-02-07 14:43:36,052 INFO L76 edCorrectnessWitness]: Location invariant before [L724-L724] ((((1 <= i) && (1 <= j)) && (2 <= correct)) && (i <= 2147483646)) && (correct != 0) [2024-02-07 14:43:36,052 INFO L76 edCorrectnessWitness]: Location invariant before [L710-L710] 0 <= prev [2024-02-07 14:43:36,053 INFO L76 edCorrectnessWitness]: Location invariant before [L707-L707] (0 <= cur) && (0 <= next) [2024-02-07 14:43:36,053 INFO L76 edCorrectnessWitness]: Location invariant before [L689-L689] (1 <= i) && (1 <= j) [2024-02-07 14:43:36,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:43:36,449 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_unsafe-12.i[30243,30256] [2024-02-07 14:43:36,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:43:36,493 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 14:43:36,570 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_unsafe-12.i[30243,30256] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:43:36,591 WARN L423 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-02-07 14:43:36,591 WARN L423 MainDispatcher]: Unable to annotate assert_cond = i < correct && j < correct with a witness entry Start Parsing Local Start Parsing Local [2024-02-07 14:43:36,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:43:36,632 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:43:36,633 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36 WrapperNode [2024-02-07 14:43:36,633 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:43:36,635 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:43:36,635 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:43:36,635 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:43:36,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,653 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,677 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2024-02-07 14:43:36,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:43:36,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:43:36,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:43:36,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:43:36,689 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,694 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,709 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 14:43:36,710 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,710 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,714 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,717 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,718 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,719 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,722 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:43:36,723 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:43:36,729 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:43:36,729 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:43:36,730 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (1/1) ... [2024-02-07 14:43:36,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:43:36,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:36,754 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 14:43:36,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 14:43:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-07 14:43:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-07 14:43:36,800 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-07 14:43:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-07 14:43:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:43:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:43:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:43:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:43:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:43:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:43:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:43:36,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:43:36,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:43:36,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:43:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:43:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:43:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:43:36,808 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:43:36,959 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:43:36,961 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:43:37,123 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:43:37,124 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:43:37,234 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:43:37,235 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-07 14:43:37,235 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:43:37 BoogieIcfgContainer [2024-02-07 14:43:37,235 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:43:37,237 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:43:37,237 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:43:37,240 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:43:37,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:43:35" (1/4) ... [2024-02-07 14:43:37,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2e39c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:43:37, skipping insertion in model container [2024-02-07 14:43:37,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:43:35" (2/4) ... [2024-02-07 14:43:37,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2e39c5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:43:37, skipping insertion in model container [2024-02-07 14:43:37,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:36" (3/4) ... [2024-02-07 14:43:37,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2e39c5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:43:37, skipping insertion in model container [2024-02-07 14:43:37,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:43:37" (4/4) ... [2024-02-07 14:43:37,243 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2024-02-07 14:43:37,256 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:43:37,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-02-07 14:43:37,257 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:43:37,309 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:43:37,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 49 transitions, 106 flow [2024-02-07 14:43:37,368 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-02-07 14:43:37,368 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:43:37,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 47 events. 4/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 93 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-02-07 14:43:37,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 49 transitions, 106 flow [2024-02-07 14:43:37,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 47 transitions, 100 flow [2024-02-07 14:43:37,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:43:37,390 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;@79a8bf77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:43:37,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 14:43:37,393 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:43:37,393 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:43:37,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:43:37,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:37,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:43:37,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:37,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:37,399 INFO L85 PathProgramCache]: Analyzing trace with hash 9963, now seen corresponding path program 1 times [2024-02-07 14:43:37,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:37,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481556866] [2024-02-07 14:43:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:37,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:37,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:37,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481556866] [2024-02-07 14:43:37,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481556866] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:37,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:37,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:43:37,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145057229] [2024-02-07 14:43:37,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:37,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 14:43:37,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:37,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 14:43:37,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 14:43:37,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:43:37,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 100 flow. Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:37,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:37,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:43:37,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:37,872 INFO L124 PetriNetUnfolderBase]: 461/1017 cut-off events. [2024-02-07 14:43:37,872 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:43:37,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1733 conditions, 1017 events. 461/1017 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6574 event pairs, 344 based on Foata normal form. 25/864 useless extension candidates. Maximal degree in co-relation 1717. Up to 701 conditions per place. [2024-02-07 14:43:37,883 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 26 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2024-02-07 14:43:37,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 140 flow [2024-02-07 14:43:37,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 14:43:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 14:43:37,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 66 transitions. [2024-02-07 14:43:37,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-02-07 14:43:37,896 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 100 flow. Second operand 2 states and 66 transitions. [2024-02-07 14:43:37,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 140 flow [2024-02-07 14:43:37,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:37,904 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 86 flow [2024-02-07 14:43:37,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=86, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-02-07 14:43:37,909 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-02-07 14:43:37,910 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 86 flow [2024-02-07 14:43:37,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:37,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:37,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:37,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:43:37,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:37,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash -939968002, now seen corresponding path program 1 times [2024-02-07 14:43:37,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:37,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118762785] [2024-02-07 14:43:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:37,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:38,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118762785] [2024-02-07 14:43:38,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118762785] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:38,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:38,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:38,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795968740] [2024-02-07 14:43:38,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:38,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:38,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:38,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:43:38,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:38,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:38,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:43:38,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:38,369 INFO L124 PetriNetUnfolderBase]: 825/1417 cut-off events. [2024-02-07 14:43:38,369 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:43:38,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2684 conditions, 1417 events. 825/1417 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7596 event pairs, 185 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2681. Up to 623 conditions per place. [2024-02-07 14:43:38,388 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 54 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2024-02-07 14:43:38,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 272 flow [2024-02-07 14:43:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-07 14:43:38,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581632653061225 [2024-02-07 14:43:38,397 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 86 flow. Second operand 4 states and 129 transitions. [2024-02-07 14:43:38,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 272 flow [2024-02-07 14:43:38,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:43:38,401 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 113 flow [2024-02-07 14:43:38,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-02-07 14:43:38,402 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-02-07 14:43:38,403 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 113 flow [2024-02-07 14:43:38,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:38,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:38,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:38,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:43:38,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:38,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:38,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1395258716, now seen corresponding path program 1 times [2024-02-07 14:43:38,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:38,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141102903] [2024-02-07 14:43:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:38,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:38,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:38,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141102903] [2024-02-07 14:43:38,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141102903] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:38,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:38,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:43:38,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13406633] [2024-02-07 14:43:38,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:38,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:38,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:38,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 14:43:38,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:38,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:38,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 14:43:38,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:38,872 INFO L124 PetriNetUnfolderBase]: 1635/3351 cut-off events. [2024-02-07 14:43:38,873 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2024-02-07 14:43:38,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6673 conditions, 3351 events. 1635/3351 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24893 event pairs, 552 based on Foata normal form. 0/2848 useless extension candidates. Maximal degree in co-relation 6668. Up to 1396 conditions per place. [2024-02-07 14:43:38,893 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 49 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-02-07 14:43:38,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 271 flow [2024-02-07 14:43:38,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-02-07 14:43:38,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-02-07 14:43:38,896 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 113 flow. Second operand 3 states and 92 transitions. [2024-02-07 14:43:38,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 271 flow [2024-02-07 14:43:38,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:43:38,900 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 127 flow [2024-02-07 14:43:38,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-02-07 14:43:38,901 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-02-07 14:43:38,901 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 127 flow [2024-02-07 14:43:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:38,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:38,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:43:38,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:38,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash -303346952, now seen corresponding path program 1 times [2024-02-07 14:43:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:38,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222031896] [2024-02-07 14:43:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:38,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:39,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:39,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222031896] [2024-02-07 14:43:39,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222031896] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:39,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:39,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:39,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871918931] [2024-02-07 14:43:39,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:39,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:39,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:39,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:39,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-02-07 14:43:39,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:39,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:39,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-02-07 14:43:39,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:39,398 INFO L124 PetriNetUnfolderBase]: 1815/3600 cut-off events. [2024-02-07 14:43:39,399 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-02-07 14:43:39,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 3600 events. 1815/3600 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 26303 event pairs, 479 based on Foata normal form. 45/3216 useless extension candidates. Maximal degree in co-relation 7505. Up to 1531 conditions per place. [2024-02-07 14:43:39,425 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-02-07 14:43:39,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 425 flow [2024-02-07 14:43:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:43:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:43:39,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-02-07 14:43:39,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563265306122449 [2024-02-07 14:43:39,427 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 127 flow. Second operand 5 states and 138 transitions. [2024-02-07 14:43:39,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 425 flow [2024-02-07 14:43:39,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 91 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:39,430 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 149 flow [2024-02-07 14:43:39,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2024-02-07 14:43:39,431 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2024-02-07 14:43:39,431 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 149 flow [2024-02-07 14:43:39,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:39,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:39,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:39,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:43:39,433 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:39,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash -303346150, now seen corresponding path program 1 times [2024-02-07 14:43:39,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:39,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325815812] [2024-02-07 14:43:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:39,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:39,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325815812] [2024-02-07 14:43:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325815812] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:39,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:39,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:39,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781704741] [2024-02-07 14:43:39,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:39,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:39,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:39,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:39,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:43:39,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:39,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:39,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:43:39,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:39,671 INFO L124 PetriNetUnfolderBase]: 1095/2324 cut-off events. [2024-02-07 14:43:39,671 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2024-02-07 14:43:39,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 2324 events. 1095/2324 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16295 event pairs, 260 based on Foata normal form. 45/2129 useless extension candidates. Maximal degree in co-relation 5142. Up to 1126 conditions per place. [2024-02-07 14:43:39,689 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 43 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-07 14:43:39,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 281 flow [2024-02-07 14:43:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-02-07 14:43:39,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-02-07 14:43:39,691 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 149 flow. Second operand 3 states and 91 transitions. [2024-02-07 14:43:39,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 281 flow [2024-02-07 14:43:39,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 275 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:39,695 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 151 flow [2024-02-07 14:43:39,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-02-07 14:43:39,696 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-02-07 14:43:39,697 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 151 flow [2024-02-07 14:43:39,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:39,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:39,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:39,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:43:39,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:39,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:39,698 INFO L85 PathProgramCache]: Analyzing trace with hash 600376683, now seen corresponding path program 1 times [2024-02-07 14:43:39,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:39,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895224207] [2024-02-07 14:43:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:39,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:39,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:39,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895224207] [2024-02-07 14:43:39,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895224207] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:39,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:39,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:39,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882184599] [2024-02-07 14:43:39,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:39,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:39,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:39,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:43:39,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:39,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:39,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:43:39,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:39,976 INFO L124 PetriNetUnfolderBase]: 1213/2076 cut-off events. [2024-02-07 14:43:39,976 INFO L125 PetriNetUnfolderBase]: For 956/956 co-relation queries the response was YES. [2024-02-07 14:43:39,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5158 conditions, 2076 events. 1213/2076 cut-off events. For 956/956 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11634 event pairs, 212 based on Foata normal form. 38/1984 useless extension candidates. Maximal degree in co-relation 5147. Up to 1227 conditions per place. [2024-02-07 14:43:39,992 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 63 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2024-02-07 14:43:39,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 405 flow [2024-02-07 14:43:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 14:43:39,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-02-07 14:43:39,994 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 151 flow. Second operand 4 states and 127 transitions. [2024-02-07 14:43:39,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 405 flow [2024-02-07 14:43:39,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 397 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:39,997 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 167 flow [2024-02-07 14:43:39,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-02-07 14:43:39,998 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-02-07 14:43:39,998 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 167 flow [2024-02-07 14:43:39,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:39,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:39,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:39,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:43:39,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:39,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:39,999 INFO L85 PathProgramCache]: Analyzing trace with hash -813820632, now seen corresponding path program 1 times [2024-02-07 14:43:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:40,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490679634] [2024-02-07 14:43:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:40,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:40,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:40,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490679634] [2024-02-07 14:43:40,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490679634] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:40,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:40,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747893139] [2024-02-07 14:43:40,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:40,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:40,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:40,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:40,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:40,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 14:43:40,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:40,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:40,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 14:43:40,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:40,443 INFO L124 PetriNetUnfolderBase]: 2113/4332 cut-off events. [2024-02-07 14:43:40,444 INFO L125 PetriNetUnfolderBase]: For 2344/2344 co-relation queries the response was YES. [2024-02-07 14:43:40,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10255 conditions, 4332 events. 2113/4332 cut-off events. For 2344/2344 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 32342 event pairs, 204 based on Foata normal form. 50/3855 useless extension candidates. Maximal degree in co-relation 10243. Up to 1551 conditions per place. [2024-02-07 14:43:40,478 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 80 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2024-02-07 14:43:40,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 535 flow [2024-02-07 14:43:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:43:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:43:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-02-07 14:43:40,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-02-07 14:43:40,480 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 167 flow. Second operand 5 states and 145 transitions. [2024-02-07 14:43:40,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 535 flow [2024-02-07 14:43:40,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 97 transitions, 509 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:40,487 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 181 flow [2024-02-07 14:43:40,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2024-02-07 14:43:40,489 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2024-02-07 14:43:40,489 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 181 flow [2024-02-07 14:43:40,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:40,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:40,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:40,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:43:40,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:40,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash 900956709, now seen corresponding path program 1 times [2024-02-07 14:43:40,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:40,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906497233] [2024-02-07 14:43:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:40,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:40,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906497233] [2024-02-07 14:43:40,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906497233] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:40,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:40,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:40,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803997569] [2024-02-07 14:43:40,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:40,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:40,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:40,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:40,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:40,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:43:40,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:40,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:40,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:43:40,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:40,832 INFO L124 PetriNetUnfolderBase]: 1647/2880 cut-off events. [2024-02-07 14:43:40,833 INFO L125 PetriNetUnfolderBase]: For 2184/2184 co-relation queries the response was YES. [2024-02-07 14:43:40,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7416 conditions, 2880 events. 1647/2880 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17113 event pairs, 433 based on Foata normal form. 57/2800 useless extension candidates. Maximal degree in co-relation 7402. Up to 1555 conditions per place. [2024-02-07 14:43:40,853 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 66 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2024-02-07 14:43:40,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 467 flow [2024-02-07 14:43:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 14:43:40,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-02-07 14:43:40,855 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 181 flow. Second operand 4 states and 127 transitions. [2024-02-07 14:43:40,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 467 flow [2024-02-07 14:43:40,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 453 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:40,859 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 189 flow [2024-02-07 14:43:40,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2024-02-07 14:43:40,862 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-02-07 14:43:40,862 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 189 flow [2024-02-07 14:43:40,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:40,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:40,862 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:40,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:43:40,863 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:40,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:40,863 INFO L85 PathProgramCache]: Analyzing trace with hash -397569460, now seen corresponding path program 1 times [2024-02-07 14:43:40,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:40,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647935912] [2024-02-07 14:43:40,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:40,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:40,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:40,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647935912] [2024-02-07 14:43:40,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647935912] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:40,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657471448] [2024-02-07 14:43:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:40,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:40,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:40,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:40,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:43:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:41,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:43:41,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:43:41,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:43:41,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657471448] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:41,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:43:41,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2024-02-07 14:43:41,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712004474] [2024-02-07 14:43:41,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:41,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:41,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:41,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:41,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-02-07 14:43:41,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:41,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:41,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-02-07 14:43:41,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:41,442 INFO L124 PetriNetUnfolderBase]: 1647/3425 cut-off events. [2024-02-07 14:43:41,442 INFO L125 PetriNetUnfolderBase]: For 2786/2786 co-relation queries the response was YES. [2024-02-07 14:43:41,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8333 conditions, 3425 events. 1647/3425 cut-off events. For 2786/2786 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 24140 event pairs, 106 based on Foata normal form. 129/3287 useless extension candidates. Maximal degree in co-relation 8318. Up to 2236 conditions per place. [2024-02-07 14:43:41,461 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 46 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-02-07 14:43:41,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 343 flow [2024-02-07 14:43:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-02-07 14:43:41,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-02-07 14:43:41,463 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 189 flow. Second operand 4 states and 99 transitions. [2024-02-07 14:43:41,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 343 flow [2024-02-07 14:43:41,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 325 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:41,472 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 173 flow [2024-02-07 14:43:41,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2024-02-07 14:43:41,474 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-02-07 14:43:41,474 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 173 flow [2024-02-07 14:43:41,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:41,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:41,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:41,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:41,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:41,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:41,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:41,690 INFO L85 PathProgramCache]: Analyzing trace with hash 560248912, now seen corresponding path program 1 times [2024-02-07 14:43:41,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:41,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081170068] [2024-02-07 14:43:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:41,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:41,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:41,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081170068] [2024-02-07 14:43:41,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081170068] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:41,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106397078] [2024-02-07 14:43:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:41,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:41,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:41,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:41,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:43:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:41,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-07 14:43:41,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:41,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:43:41,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106397078] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:41,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:43:41,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 8 [2024-02-07 14:43:41,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666618497] [2024-02-07 14:43:41,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:41,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:41,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:41,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:41,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-02-07 14:43:42,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-02-07 14:43:42,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 173 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:42,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:42,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-02-07 14:43:42,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:42,405 INFO L124 PetriNetUnfolderBase]: 1647/3296 cut-off events. [2024-02-07 14:43:42,405 INFO L125 PetriNetUnfolderBase]: For 2325/2325 co-relation queries the response was YES. [2024-02-07 14:43:42,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 3296 events. 1647/3296 cut-off events. For 2325/2325 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 22095 event pairs, 106 based on Foata normal form. 129/3158 useless extension candidates. Maximal degree in co-relation 7886. Up to 1677 conditions per place. [2024-02-07 14:43:42,425 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 71 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-02-07 14:43:42,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 497 flow [2024-02-07 14:43:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-02-07 14:43:42,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-02-07 14:43:42,427 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 173 flow. Second operand 6 states and 139 transitions. [2024-02-07 14:43:42,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 497 flow [2024-02-07 14:43:42,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 490 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:42,435 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 168 flow [2024-02-07 14:43:42,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2024-02-07 14:43:42,436 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-02-07 14:43:42,436 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 168 flow [2024-02-07 14:43:42,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:42,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:42,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:42,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:42,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-07 14:43:42,655 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:42,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash 560249714, now seen corresponding path program 1 times [2024-02-07 14:43:42,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:42,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776350810] [2024-02-07 14:43:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:42,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:42,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:42,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776350810] [2024-02-07 14:43:42,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776350810] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:42,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982948546] [2024-02-07 14:43:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:42,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:42,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:42,697 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:42,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:43:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:42,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-07 14:43:42,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:42,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:42,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982948546] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:42,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:42,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-07 14:43:42,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386951174] [2024-02-07 14:43:42,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:42,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:42,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:42,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:42,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:43:42,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:42,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:42,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:43:42,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:43,180 INFO L124 PetriNetUnfolderBase]: 1991/3388 cut-off events. [2024-02-07 14:43:43,181 INFO L125 PetriNetUnfolderBase]: For 2832/2832 co-relation queries the response was YES. [2024-02-07 14:43:43,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9213 conditions, 3388 events. 1991/3388 cut-off events. For 2832/2832 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 17460 event pairs, 313 based on Foata normal form. 129/3383 useless extension candidates. Maximal degree in co-relation 9200. Up to 775 conditions per place. [2024-02-07 14:43:43,202 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 94 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2024-02-07 14:43:43,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 110 transitions, 646 flow [2024-02-07 14:43:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-02-07 14:43:43,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-02-07 14:43:43,204 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 168 flow. Second operand 6 states and 179 transitions. [2024-02-07 14:43:43,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 110 transitions, 646 flow [2024-02-07 14:43:43,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 110 transitions, 625 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-02-07 14:43:43,211 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 195 flow [2024-02-07 14:43:43,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2024-02-07 14:43:43,212 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-02-07 14:43:43,212 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 195 flow [2024-02-07 14:43:43,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:43,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:43,213 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:43,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-07 14:43:43,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:43,428 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:43,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:43,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1018936604, now seen corresponding path program 1 times [2024-02-07 14:43:43,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:43,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778397787] [2024-02-07 14:43:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:43,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:43,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:43,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778397787] [2024-02-07 14:43:43,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778397787] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:43,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:43,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:43,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973694786] [2024-02-07 14:43:43,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:43,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:43,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:43,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:43:43,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 195 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:43,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:43,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:43:43,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:43,807 INFO L124 PetriNetUnfolderBase]: 2009/3483 cut-off events. [2024-02-07 14:43:43,807 INFO L125 PetriNetUnfolderBase]: For 4809/4809 co-relation queries the response was YES. [2024-02-07 14:43:43,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9789 conditions, 3483 events. 2009/3483 cut-off events. For 4809/4809 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 19256 event pairs, 557 based on Foata normal form. 133/3555 useless extension candidates. Maximal degree in co-relation 9775. Up to 1395 conditions per place. [2024-02-07 14:43:43,831 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 75 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2024-02-07 14:43:43,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 547 flow [2024-02-07 14:43:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-02-07 14:43:43,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-02-07 14:43:43,833 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 195 flow. Second operand 4 states and 128 transitions. [2024-02-07 14:43:43,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 547 flow [2024-02-07 14:43:43,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 543 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:43,839 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 219 flow [2024-02-07 14:43:43,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2024-02-07 14:43:43,840 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2024-02-07 14:43:43,841 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 219 flow [2024-02-07 14:43:43,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:43,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:43,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:43,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 14:43:43,841 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:43,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1151039460, now seen corresponding path program 2 times [2024-02-07 14:43:43,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:43,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990907597] [2024-02-07 14:43:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:43,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:43,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:43,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990907597] [2024-02-07 14:43:43,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990907597] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:43,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:43,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:43,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937970125] [2024-02-07 14:43:43,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:43,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:43,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:43,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:43,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:43,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-02-07 14:43:43,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:43,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:43,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-02-07 14:43:43,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:44,227 INFO L124 PetriNetUnfolderBase]: 2029/3522 cut-off events. [2024-02-07 14:43:44,228 INFO L125 PetriNetUnfolderBase]: For 6210/6210 co-relation queries the response was YES. [2024-02-07 14:43:44,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9936 conditions, 3522 events. 2029/3522 cut-off events. For 6210/6210 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 19467 event pairs, 506 based on Foata normal form. 114/3573 useless extension candidates. Maximal degree in co-relation 9919. Up to 1122 conditions per place. [2024-02-07 14:43:44,245 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 69 selfloop transitions, 4 changer transitions 3/88 dead transitions. [2024-02-07 14:43:44,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 537 flow [2024-02-07 14:43:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-02-07 14:43:44,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-02-07 14:43:44,248 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 219 flow. Second operand 4 states and 124 transitions. [2024-02-07 14:43:44,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 537 flow [2024-02-07 14:43:44,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 525 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:44,260 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 205 flow [2024-02-07 14:43:44,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2024-02-07 14:43:44,261 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-02-07 14:43:44,261 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 205 flow [2024-02-07 14:43:44,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:44,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:44,262 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:44,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 14:43:44,262 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:44,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:44,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1195539322, now seen corresponding path program 2 times [2024-02-07 14:43:44,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:44,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794925959] [2024-02-07 14:43:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:44,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-02-07 14:43:44,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:44,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794925959] [2024-02-07 14:43:44,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794925959] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:44,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:44,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:44,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502382885] [2024-02-07 14:43:44,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:44,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:44,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-02-07 14:43:44,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:44,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:44,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-02-07 14:43:44,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:44,629 INFO L124 PetriNetUnfolderBase]: 2065/3667 cut-off events. [2024-02-07 14:43:44,629 INFO L125 PetriNetUnfolderBase]: For 4082/4082 co-relation queries the response was YES. [2024-02-07 14:43:44,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10494 conditions, 3667 events. 2065/3667 cut-off events. For 4082/4082 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 20026 event pairs, 1262 based on Foata normal form. 0/3550 useless extension candidates. Maximal degree in co-relation 10478. Up to 2405 conditions per place. [2024-02-07 14:43:44,655 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 48 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-07 14:43:44,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 377 flow [2024-02-07 14:43:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-02-07 14:43:44,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-02-07 14:43:44,657 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 205 flow. Second operand 4 states and 89 transitions. [2024-02-07 14:43:44,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 377 flow [2024-02-07 14:43:44,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:44,666 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 205 flow [2024-02-07 14:43:44,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2024-02-07 14:43:44,667 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-02-07 14:43:44,667 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 205 flow [2024-02-07 14:43:44,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:44,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:44,668 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:44,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 14:43:44,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:44,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2137937304, now seen corresponding path program 1 times [2024-02-07 14:43:44,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:44,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725863981] [2024-02-07 14:43:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:44,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-02-07 14:43:44,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:44,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725863981] [2024-02-07 14:43:44,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725863981] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:44,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:44,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:44,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529457677] [2024-02-07 14:43:44,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:44,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:44,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:44,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:44,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:44,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:43:44,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:44,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:44,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:43:44,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:45,014 INFO L124 PetriNetUnfolderBase]: 1957/3505 cut-off events. [2024-02-07 14:43:45,014 INFO L125 PetriNetUnfolderBase]: For 3548/3548 co-relation queries the response was YES. [2024-02-07 14:43:45,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10126 conditions, 3505 events. 1957/3505 cut-off events. For 3548/3548 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 19105 event pairs, 1349 based on Foata normal form. 0/3388 useless extension candidates. Maximal degree in co-relation 10110. Up to 2568 conditions per place. [2024-02-07 14:43:45,035 INFO L140 encePairwiseOnDemand]: 47/49 looper letters, 48 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2024-02-07 14:43:45,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 373 flow [2024-02-07 14:43:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-02-07 14:43:45,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-02-07 14:43:45,037 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 205 flow. Second operand 3 states and 80 transitions. [2024-02-07 14:43:45,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 373 flow [2024-02-07 14:43:45,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:45,050 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 202 flow [2024-02-07 14:43:45,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2024-02-07 14:43:45,051 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2024-02-07 14:43:45,051 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 202 flow [2024-02-07 14:43:45,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:45,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:45,052 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:45,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 14:43:45,052 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:45,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:45,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1851546691, now seen corresponding path program 1 times [2024-02-07 14:43:45,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:45,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055858824] [2024-02-07 14:43:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:45,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:45,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:45,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055858824] [2024-02-07 14:43:45,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055858824] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:45,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923024506] [2024-02-07 14:43:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:45,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:45,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:45,145 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:45,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 14:43:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:45,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:43:45,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:45,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:45,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923024506] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:45,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:45,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-07 14:43:45,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116337425] [2024-02-07 14:43:45,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:45,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:43:45,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:45,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:43:45,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:43:45,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:43:45,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 202 flow. Second operand has 13 states, 13 states have (on average 19.923076923076923) internal successors, (259), 13 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:45,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:45,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:43:45,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:46,154 INFO L124 PetriNetUnfolderBase]: 4981/7879 cut-off events. [2024-02-07 14:43:46,154 INFO L125 PetriNetUnfolderBase]: For 9497/9497 co-relation queries the response was YES. [2024-02-07 14:43:46,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24549 conditions, 7879 events. 4981/7879 cut-off events. For 9497/9497 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 38332 event pairs, 392 based on Foata normal form. 324/8090 useless extension candidates. Maximal degree in co-relation 24533. Up to 833 conditions per place. [2024-02-07 14:43:46,203 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 195 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2024-02-07 14:43:46,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 215 transitions, 1506 flow [2024-02-07 14:43:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:43:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:43:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-02-07 14:43:46,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576530612244898 [2024-02-07 14:43:46,205 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 202 flow. Second operand 12 states and 339 transitions. [2024-02-07 14:43:46,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 215 transitions, 1506 flow [2024-02-07 14:43:46,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 215 transitions, 1505 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:46,221 INFO L231 Difference]: Finished difference. Result has 85 places, 52 transitions, 309 flow [2024-02-07 14:43:46,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=85, PETRI_TRANSITIONS=52} [2024-02-07 14:43:46,222 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-02-07 14:43:46,222 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 52 transitions, 309 flow [2024-02-07 14:43:46,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.923076923076923) internal successors, (259), 13 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:46,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:46,222 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:46,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:46,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-07 14:43:46,437 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:46,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash 758074797, now seen corresponding path program 2 times [2024-02-07 14:43:46,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:46,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057424760] [2024-02-07 14:43:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:46,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:46,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:46,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057424760] [2024-02-07 14:43:46,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057424760] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:46,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546143970] [2024-02-07 14:43:46,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:46,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:46,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:46,669 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:46,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 14:43:46,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 14:43:46,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:46,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:43:46,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-02-07 14:43:46,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:43:46,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546143970] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:46,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:43:46,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2024-02-07 14:43:46,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878125484] [2024-02-07 14:43:46,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:46,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:46,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:46,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:46,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:43:46,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-02-07 14:43:46,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 52 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:46,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:46,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-02-07 14:43:46,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:47,414 INFO L124 PetriNetUnfolderBase]: 4117/6907 cut-off events. [2024-02-07 14:43:47,414 INFO L125 PetriNetUnfolderBase]: For 12314/12314 co-relation queries the response was YES. [2024-02-07 14:43:47,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23021 conditions, 6907 events. 4117/6907 cut-off events. For 12314/12314 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 35629 event pairs, 2915 based on Foata normal form. 0/6898 useless extension candidates. Maximal degree in co-relation 22999. Up to 5484 conditions per place. [2024-02-07 14:43:47,474 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 69 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-02-07 14:43:47,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 593 flow [2024-02-07 14:43:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-02-07 14:43:47,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-02-07 14:43:47,475 INFO L175 Difference]: Start difference. First operand has 85 places, 52 transitions, 309 flow. Second operand 4 states and 94 transitions. [2024-02-07 14:43:47,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 593 flow [2024-02-07 14:43:47,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 587 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:47,501 INFO L231 Difference]: Finished difference. Result has 84 places, 51 transitions, 305 flow [2024-02-07 14:43:47,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=84, PETRI_TRANSITIONS=51} [2024-02-07 14:43:47,502 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2024-02-07 14:43:47,503 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 305 flow [2024-02-07 14:43:47,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:47,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:47,503 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:47,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:47,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-07 14:43:47,717 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:47,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1634551544, now seen corresponding path program 1 times [2024-02-07 14:43:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470047524] [2024-02-07 14:43:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:47,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:47,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470047524] [2024-02-07 14:43:47,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470047524] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:47,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444443069] [2024-02-07 14:43:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:47,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:47,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:47,947 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:47,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 14:43:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:48,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:48,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:48,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:48,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444443069] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:48,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:48,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-02-07 14:43:48,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605144145] [2024-02-07 14:43:48,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:48,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-07 14:43:48,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:48,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-07 14:43:48,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-02-07 14:43:48,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:43:48,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 305 flow. Second operand has 25 states, 25 states have (on average 19.96) internal successors, (499), 25 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:48,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:48,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:43:48,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:50,554 INFO L124 PetriNetUnfolderBase]: 10165/15601 cut-off events. [2024-02-07 14:43:50,554 INFO L125 PetriNetUnfolderBase]: For 44273/44273 co-relation queries the response was YES. [2024-02-07 14:43:50,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54203 conditions, 15601 events. 10165/15601 cut-off events. For 44273/44273 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 73341 event pairs, 392 based on Foata normal form. 648/16190 useless extension candidates. Maximal degree in co-relation 54180. Up to 1697 conditions per place. [2024-02-07 14:43:50,643 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 399 selfloop transitions, 24 changer transitions 0/430 dead transitions. [2024-02-07 14:43:50,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 430 transitions, 3245 flow [2024-02-07 14:43:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-07 14:43:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-07 14:43:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 681 transitions. [2024-02-07 14:43:50,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790816326530612 [2024-02-07 14:43:50,646 INFO L175 Difference]: Start difference. First operand has 84 places, 51 transitions, 305 flow. Second operand 24 states and 681 transitions. [2024-02-07 14:43:50,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 430 transitions, 3245 flow [2024-02-07 14:43:50,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 430 transitions, 3242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:50,689 INFO L231 Difference]: Finished difference. Result has 118 places, 64 transitions, 558 flow [2024-02-07 14:43:50,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=558, PETRI_PLACES=118, PETRI_TRANSITIONS=64} [2024-02-07 14:43:50,690 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-02-07 14:43:50,690 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 64 transitions, 558 flow [2024-02-07 14:43:50,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 19.96) internal successors, (499), 25 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:50,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:50,690 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:50,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-07 14:43:50,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-07 14:43:50,904 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:50,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:50,905 INFO L85 PathProgramCache]: Analyzing trace with hash -28826392, now seen corresponding path program 2 times [2024-02-07 14:43:50,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:50,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550357731] [2024-02-07 14:43:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:50,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:51,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550357731] [2024-02-07 14:43:51,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550357731] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:51,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799649306] [2024-02-07 14:43:51,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:51,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:51,618 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:51,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 14:43:51,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:51,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:51,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-07 14:43:51,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:51,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:52,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799649306] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:52,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:52,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 29 [2024-02-07 14:43:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166150640] [2024-02-07 14:43:52,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-07 14:43:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-07 14:43:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2024-02-07 14:43:52,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-02-07 14:43:52,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 64 transitions, 558 flow. Second operand has 29 states, 29 states have (on average 20.103448275862068) internal successors, (583), 29 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:52,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:52,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-02-07 14:43:52,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:54,824 INFO L124 PetriNetUnfolderBase]: 11893/18193 cut-off events. [2024-02-07 14:43:54,825 INFO L125 PetriNetUnfolderBase]: For 87437/87437 co-relation queries the response was YES. [2024-02-07 14:43:54,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67627 conditions, 18193 events. 11893/18193 cut-off events. For 87437/87437 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 85281 event pairs, 392 based on Foata normal form. 216/18350 useless extension candidates. Maximal degree in co-relation 67592. Up to 1985 conditions per place. [2024-02-07 14:43:54,952 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 467 selfloop transitions, 28 changer transitions 0/502 dead transitions. [2024-02-07 14:43:54,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 502 transitions, 3958 flow [2024-02-07 14:43:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-07 14:43:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-07 14:43:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 785 transitions. [2024-02-07 14:43:54,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5721574344023324 [2024-02-07 14:43:54,956 INFO L175 Difference]: Start difference. First operand has 118 places, 64 transitions, 558 flow. Second operand 28 states and 785 transitions. [2024-02-07 14:43:54,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 502 transitions, 3958 flow [2024-02-07 14:43:55,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 502 transitions, 3940 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-02-07 14:43:55,044 INFO L231 Difference]: Finished difference. Result has 141 places, 69 transitions, 696 flow [2024-02-07 14:43:55,044 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=28, PETRI_FLOW=696, PETRI_PLACES=141, PETRI_TRANSITIONS=69} [2024-02-07 14:43:55,044 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-02-07 14:43:55,045 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 69 transitions, 696 flow [2024-02-07 14:43:55,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 20.103448275862068) internal successors, (583), 29 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:55,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:55,047 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:55,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-02-07 14:43:55,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:55,261 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 14:43:55,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2122878072, now seen corresponding path program 3 times [2024-02-07 14:43:55,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:55,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283974002] [2024-02-07 14:43:55,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:55,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:00,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:44:00,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283974002] [2024-02-07 14:44:00,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283974002] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:44:00,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338053914] [2024-02-07 14:44:00,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:44:00,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:44:00,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:44:00,942 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:44:00,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 14:44:01,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2024-02-07 14:44:01,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:44:01,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 86 conjunts are in the unsatisfiable core [2024-02-07 14:44:01,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:44:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 1152 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:09,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:44:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:19,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338053914] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:44:19,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:44:19,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 241 [2024-02-07 14:44:19,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068258868] [2024-02-07 14:44:19,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:44:19,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 242 states [2024-02-07 14:44:19,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:44:19,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2024-02-07 14:44:19,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3550, Invalid=54772, Unknown=0, NotChecked=0, Total=58322 [2024-02-07 14:44:22,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 49 [2024-02-07 14:44:22,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 69 transitions, 696 flow. Second operand has 242 states, 242 states have (on average 11.119834710743802) internal successors, (2691), 242 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:44:22,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:44:22,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 49 [2024-02-07 14:44:22,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15