./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/clever.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/clever.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d8006e4b Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/clever.wvr.c ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/clever.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-d8006e4-m [2024-02-05 10:32:57,467 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:32:57,559 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:32:57,564 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:32:57,565 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:32:57,589 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:32:57,589 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:32:57,590 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:32:57,591 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:32:57,594 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:32:57,594 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:32:57,594 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:32:57,595 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:32:57,596 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:32:57,596 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:32:57,596 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:32:57,596 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:32:57,597 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:32:57,597 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:32:57,597 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:32:57,597 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:32:57,597 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:32:57,598 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:32:57,598 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:32:57,598 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:32:57,598 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:32:57,598 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:32:57,599 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:32:57,599 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:32:57,599 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:32:57,612 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:32:57,612 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:32:57,612 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:32:57,612 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:32:57,612 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:32:57,613 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:32:57,613 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:32:57,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:32:57,613 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:32:57,613 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:32:57,613 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:32:57,613 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:32:57,613 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:32:57,614 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:32:57,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:32:57,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:32:57,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:32:57,849 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:32:57,850 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:32:57,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2024-02-05 10:32:58,976 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:32:59,152 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:32:59,152 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2024-02-05 10:32:59,158 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf4e22fa/265e2ea2c6fc44e08b8b1e5a97867a6f/FLAG5504102a5 [2024-02-05 10:32:59,167 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf4e22fa/265e2ea2c6fc44e08b8b1e5a97867a6f [2024-02-05 10:32:59,169 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:32:59,171 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:32:59,171 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/clever.wvr.yml/witness.yml [2024-02-05 10:32:59,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:32:59,269 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:32:59,270 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:32:59,270 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:32:59,274 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:32:59,274 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:32:59" (1/2) ... [2024-02-05 10:32:59,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a4b6773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:32:59, skipping insertion in model container [2024-02-05 10:32:59,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:32:59" (1/2) ... [2024-02-05 10:32:59,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6c930580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:32:59, skipping insertion in model container [2024-02-05 10:32:59,277 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:32:59" (2/2) ... [2024-02-05 10:32:59,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a4b6773 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59, skipping insertion in model container [2024-02-05 10:32:59,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:32:59" (2/2) ... [2024-02-05 10:32:59,278 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:32:59,307 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:32:59,311 INFO L101 nessWitnessExtractor]: Location invariant before [L56-L56] (unsigned long )_argptr == 0UL [2024-02-05 10:32:59,312 INFO L101 nessWitnessExtractor]: Location invariant before [L47-L47] (unsigned long )_argptr == 0UL [2024-02-05 10:32:59,312 INFO L101 nessWitnessExtractor]: Location invariant before [L52-L52] (unsigned long )_argptr == 0UL [2024-02-05 10:32:59,312 INFO L101 nessWitnessExtractor]: Location invariant before [L44-L44] (unsigned long )_argptr == 0UL [2024-02-05 10:32:59,312 INFO L101 nessWitnessExtractor]: Location invariant before [L63-L63] (((((((((((0LL - (long long )i2) + (long long )j1 >= 0LL) && ((long long )i2 + (long long )j1 >= 0LL)) && ((0LL - (long long )i2) - (long long )j1 >= 0LL)) && ((long long )i2 - (long long )j1 >= 0LL)) && (n == 0)) && (m == 0)) && (i1 == 0)) && (i2 == 0)) && (j1 == 0)) && (k1 == 0U)) && (k2 == 0U) [2024-02-05 10:32:59,313 INFO L101 nessWitnessExtractor]: Loop invariant at [L51-L51] (unsigned long )_argptr == 0UL [2024-02-05 10:32:59,313 INFO L101 nessWitnessExtractor]: Loop invariant at [L41-L41] (unsigned long )_argptr == 0UL [2024-02-05 10:32:59,313 INFO L101 nessWitnessExtractor]: Location invariant before [L66-L66] ((((((((0LL - (long long )i2) + (long long )j1 >= 0LL) && ((long long )i2 + (long long )j1 >= 0LL)) && ((0LL - (long long )i2) - (long long )j1 >= 0LL)) && ((long long )i2 - (long long )j1 >= 0LL)) && (i2 == 0)) && (j1 == 0)) && (k1 == 0U)) && (k2 == 0U) [2024-02-05 10:32:59,313 INFO L101 nessWitnessExtractor]: Loop invariant at [L40-L40] (unsigned long )_argptr == 0UL [2024-02-05 10:32:59,313 INFO L101 nessWitnessExtractor]: Location invariant before [L67-L67] ((j1 == 0) && (k1 == 0U)) && (k2 == 0U) [2024-02-05 10:32:59,314 INFO L101 nessWitnessExtractor]: Location invariant before [L53-L53] (unsigned long )_argptr == 0UL [2024-02-05 10:32:59,314 INFO L101 nessWitnessExtractor]: Location invariant before [L69-L69] k2 == 0U [2024-02-05 10:32:59,314 INFO L101 nessWitnessExtractor]: Location invariant before [L64-L64] ((((((((((0LL - (long long )i2) + (long long )j1 >= 0LL) && ((long long )i2 + (long long )j1 >= 0LL)) && ((0LL - (long long )i2) - (long long )j1 >= 0LL)) && ((long long )i2 - (long long )j1 >= 0LL)) && (m == 0)) && (i1 == 0)) && (i2 == 0)) && (j1 == 0)) && (k1 == 0U)) && (k2 == 0U) [2024-02-05 10:32:59,314 INFO L101 nessWitnessExtractor]: Location invariant before [L65-L65] (((((((((0LL - (long long )i2) + (long long )j1 >= 0LL) && ((long long )i2 + (long long )j1 >= 0LL)) && ((0LL - (long long )i2) - (long long )j1 >= 0LL)) && ((long long )i2 - (long long )j1 >= 0LL)) && (i1 == 0)) && (i2 == 0)) && (j1 == 0)) && (k1 == 0U)) && (k2 == 0U) [2024-02-05 10:32:59,314 INFO L101 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-02-05 10:32:59,314 INFO L101 nessWitnessExtractor]: Location invariant before [L68-L68] (k1 == 0U) && (k2 == 0U) [2024-02-05 10:32:59,331 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:32:59,463 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c[2159,2172] [2024-02-05 10:32:59,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:32:59,471 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:32:59,525 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c[2159,2172] [2024-02-05 10:32:59,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:32:59,554 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:32:59,555 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59 WrapperNode [2024-02-05 10:32:59,555 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:32:59,572 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:32:59,572 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:32:59,572 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:32:59,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,584 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,602 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 91 [2024-02-05 10:32:59,603 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:32:59,604 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:32:59,604 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:32:59,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:32:59,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,625 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,645 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 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]. [2024-02-05 10:32:59,649 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,668 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,670 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,676 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:32:59,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:32:59,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:32:59,678 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:32:59,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (1/1) ... [2024-02-05 10:32:59,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:32:59,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:32:59,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-05 10:32:59,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-05 10:32:59,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:32:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-05 10:32:59,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-05 10:32:59,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-05 10:32:59,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-05 10:32:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:32:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:32:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:32:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:32:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:32:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:32:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:32:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:32:59,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:32:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-05 10:32:59,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-05 10:32:59,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-05 10:32:59,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:32:59,743 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-05 10:32:59,815 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:32:59,816 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:33:00,021 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:33:00,021 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:33:00,149 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:33:00,149 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-05 10:33:00,150 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:33:00 BoogieIcfgContainer [2024-02-05 10:33:00,151 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:33:00,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:33:00,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:33:00,155 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:33:00,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:32:59" (1/4) ... [2024-02-05 10:33:00,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e168455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:33:00, skipping insertion in model container [2024-02-05 10:33:00,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:32:59" (2/4) ... [2024-02-05 10:33:00,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e168455 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:33:00, skipping insertion in model container [2024-02-05 10:33:00,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:32:59" (3/4) ... [2024-02-05 10:33:00,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e168455 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:33:00, skipping insertion in model container [2024-02-05 10:33:00,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:33:00" (4/4) ... [2024-02-05 10:33:00,159 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-02-05 10:33:00,172 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:33:00,172 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2024-02-05 10:33:00,172 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:33:00,287 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-05 10:33:00,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 124 flow [2024-02-05 10:33:00,369 INFO L124 PetriNetUnfolderBase]: 5/53 cut-off events. [2024-02-05 10:33:00,370 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:33:00,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 53 events. 5/53 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 98 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-02-05 10:33:00,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 124 flow [2024-02-05 10:33:00,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 52 transitions, 116 flow [2024-02-05 10:33:00,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:33:00,431 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;@2ee11aae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:33:00,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2024-02-05 10:33:00,441 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:33:00,441 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:33:00,441 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:33:00,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:00,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:33:00,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:00,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:00,447 INFO L85 PathProgramCache]: Analyzing trace with hash 11133, now seen corresponding path program 1 times [2024-02-05 10:33:00,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:00,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367649455] [2024-02-05 10:33:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:00,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:00,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:00,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367649455] [2024-02-05 10:33:00,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367649455] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:00,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:00,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:33:00,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771186275] [2024-02-05 10:33:00,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:00,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:33:00,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:33:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:33:00,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-02-05 10:33:00,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:00,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:00,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-02-05 10:33:00,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:01,026 INFO L124 PetriNetUnfolderBase]: 159/398 cut-off events. [2024-02-05 10:33:01,026 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-02-05 10:33:01,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 398 events. 159/398 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2110 event pairs, 95 based on Foata normal form. 50/386 useless extension candidates. Maximal degree in co-relation 598. Up to 265 conditions per place. [2024-02-05 10:33:01,034 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 31 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-02-05 10:33:01,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 176 flow [2024-02-05 10:33:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-02-05 10:33:01,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-02-05 10:33:01,046 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 116 flow. Second operand 3 states and 90 transitions. [2024-02-05 10:33:01,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 176 flow [2024-02-05 10:33:01,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 168 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-05 10:33:01,054 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 106 flow [2024-02-05 10:33:01,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-02-05 10:33:01,059 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2024-02-05 10:33:01,059 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 106 flow [2024-02-05 10:33:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:01,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-05 10:33:01,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:33:01,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:01,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:01,062 INFO L85 PathProgramCache]: Analyzing trace with hash 345465, now seen corresponding path program 1 times [2024-02-05 10:33:01,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:01,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939610671] [2024-02-05 10:33:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:01,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:01,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:01,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939610671] [2024-02-05 10:33:01,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939610671] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:01,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:01,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:01,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226328358] [2024-02-05 10:33:01,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:01,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:01,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:01,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:01,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:01,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-02-05 10:33:01,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:01,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-02-05 10:33:01,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:01,246 INFO L124 PetriNetUnfolderBase]: 115/338 cut-off events. [2024-02-05 10:33:01,246 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:33:01,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 338 events. 115/338 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1814 event pairs, 61 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 535. Up to 193 conditions per place. [2024-02-05 10:33:01,249 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 28 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-02-05 10:33:01,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 164 flow [2024-02-05 10:33:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-02-05 10:33:01,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5696969696969697 [2024-02-05 10:33:01,250 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 106 flow. Second operand 3 states and 94 transitions. [2024-02-05 10:33:01,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 164 flow [2024-02-05 10:33:01,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:01,252 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 104 flow [2024-02-05 10:33:01,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-02-05 10:33:01,252 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-02-05 10:33:01,253 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 104 flow [2024-02-05 10:33:01,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:01,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-05 10:33:01,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:33:01,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:01,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:01,254 INFO L85 PathProgramCache]: Analyzing trace with hash 10709797, now seen corresponding path program 1 times [2024-02-05 10:33:01,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:01,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016383507] [2024-02-05 10:33:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:01,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:01,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:01,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016383507] [2024-02-05 10:33:01,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016383507] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:01,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:01,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:01,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494177947] [2024-02-05 10:33:01,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:01,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:01,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:01,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:01,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:01,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-05 10:33:01,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:01,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-05 10:33:01,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:01,442 INFO L124 PetriNetUnfolderBase]: 99/293 cut-off events. [2024-02-05 10:33:01,456 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:33:01,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 293 events. 99/293 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1510 event pairs, 50 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 460. Up to 165 conditions per place. [2024-02-05 10:33:01,458 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 26 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-02-05 10:33:01,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 158 flow [2024-02-05 10:33:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-02-05 10:33:01,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593939393939394 [2024-02-05 10:33:01,460 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 104 flow. Second operand 3 states and 98 transitions. [2024-02-05 10:33:01,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 158 flow [2024-02-05 10:33:01,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:01,461 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 102 flow [2024-02-05 10:33:01,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, 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=102, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-02-05 10:33:01,462 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2024-02-05 10:33:01,462 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 102 flow [2024-02-05 10:33:01,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:01,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:33:01,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:33:01,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:01,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:01,463 INFO L85 PathProgramCache]: Analyzing trace with hash 332004059, now seen corresponding path program 1 times [2024-02-05 10:33:01,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:01,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852693904] [2024-02-05 10:33:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:01,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:01,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:01,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852693904] [2024-02-05 10:33:01,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852693904] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:01,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:01,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:01,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722605589] [2024-02-05 10:33:01,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:01,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:01,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:01,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:01,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:01,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:33:01,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:01,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:33:01,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:01,692 INFO L124 PetriNetUnfolderBase]: 99/292 cut-off events. [2024-02-05 10:33:01,692 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:33:01,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 292 events. 99/292 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1507 event pairs, 50 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 456. Up to 163 conditions per place. [2024-02-05 10:33:01,694 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 25 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-02-05 10:33:01,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 154 flow [2024-02-05 10:33:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-02-05 10:33:01,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-02-05 10:33:01,695 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 102 flow. Second operand 3 states and 100 transitions. [2024-02-05 10:33:01,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 154 flow [2024-02-05 10:33:01,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:01,696 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 100 flow [2024-02-05 10:33:01,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, 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=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-02-05 10:33:01,697 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2024-02-05 10:33:01,697 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 100 flow [2024-02-05 10:33:01,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:01,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-05 10:33:01,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:33:01,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:01,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:01,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1702191601, now seen corresponding path program 1 times [2024-02-05 10:33:01,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:01,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625467334] [2024-02-05 10:33:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:01,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:01,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:01,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625467334] [2024-02-05 10:33:01,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625467334] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:01,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:01,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:01,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278794481] [2024-02-05 10:33:01,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:01,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:01,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:01,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:01,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:01,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 55 [2024-02-05 10:33:01,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:01,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 55 [2024-02-05 10:33:01,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:01,818 INFO L124 PetriNetUnfolderBase]: 183/526 cut-off events. [2024-02-05 10:33:01,818 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:33:01,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 526 events. 183/526 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3240 event pairs, 53 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 825. Up to 153 conditions per place. [2024-02-05 10:33:01,821 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 37 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-02-05 10:33:01,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 213 flow [2024-02-05 10:33:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2024-02-05 10:33:01,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2024-02-05 10:33:01,823 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 100 flow. Second operand 4 states and 142 transitions. [2024-02-05 10:33:01,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 213 flow [2024-02-05 10:33:01,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:01,824 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 116 flow [2024-02-05 10:33:01,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=4, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2024-02-05 10:33:01,825 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-02-05 10:33:01,825 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 116 flow [2024-02-05 10:33:01,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:01,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:01,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:33:01,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:01,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1228332452, now seen corresponding path program 1 times [2024-02-05 10:33:01,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:01,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272204276] [2024-02-05 10:33:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:01,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:01,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:01,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272204276] [2024-02-05 10:33:01,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272204276] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:01,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:01,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:01,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638281422] [2024-02-05 10:33:01,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:01,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:33:01,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:33:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:33:01,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 55 [2024-02-05 10:33:01,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:01,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 55 [2024-02-05 10:33:01,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:01,932 INFO L124 PetriNetUnfolderBase]: 246/719 cut-off events. [2024-02-05 10:33:01,932 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-02-05 10:33:01,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 719 events. 246/719 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4788 event pairs, 41 based on Foata normal form. 2/619 useless extension candidates. Maximal degree in co-relation 416. Up to 314 conditions per place. [2024-02-05 10:33:01,935 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 35 selfloop transitions, 5 changer transitions 1/60 dead transitions. [2024-02-05 10:33:01,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 60 transitions, 237 flow [2024-02-05 10:33:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2024-02-05 10:33:01,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7151515151515152 [2024-02-05 10:33:01,937 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 116 flow. Second operand 3 states and 118 transitions. [2024-02-05 10:33:01,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 60 transitions, 237 flow [2024-02-05 10:33:01,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 60 transitions, 235 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:01,940 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 141 flow [2024-02-05 10:33:01,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-02-05 10:33:01,943 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2024-02-05 10:33:01,943 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 141 flow [2024-02-05 10:33:01,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:01,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:01,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:33:01,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:01,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash -576399314, now seen corresponding path program 1 times [2024-02-05 10:33:01,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:01,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674692395] [2024-02-05 10:33:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:01,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:01,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:01,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674692395] [2024-02-05 10:33:01,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674692395] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:01,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:01,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:01,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771133831] [2024-02-05 10:33:01,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:01,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:33:01,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:01,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:33:01,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:33:01,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 55 [2024-02-05 10:33:01,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:01,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:01,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 55 [2024-02-05 10:33:01,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:02,089 INFO L124 PetriNetUnfolderBase]: 258/775 cut-off events. [2024-02-05 10:33:02,090 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2024-02-05 10:33:02,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 775 events. 258/775 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5296 event pairs, 91 based on Foata normal form. 1/660 useless extension candidates. Maximal degree in co-relation 583. Up to 225 conditions per place. [2024-02-05 10:33:02,094 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 39 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2024-02-05 10:33:02,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 271 flow [2024-02-05 10:33:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2024-02-05 10:33:02,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7151515151515152 [2024-02-05 10:33:02,095 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 141 flow. Second operand 3 states and 118 transitions. [2024-02-05 10:33:02,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 271 flow [2024-02-05 10:33:02,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:02,098 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 149 flow [2024-02-05 10:33:02,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-02-05 10:33:02,099 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2024-02-05 10:33:02,099 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 149 flow [2024-02-05 10:33:02,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:02,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:02,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:02,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:33:02,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:02,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:02,100 INFO L85 PathProgramCache]: Analyzing trace with hash -232303854, now seen corresponding path program 1 times [2024-02-05 10:33:02,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:02,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79532648] [2024-02-05 10:33:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:02,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:02,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:02,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79532648] [2024-02-05 10:33:02,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79532648] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:02,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:02,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:02,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088034653] [2024-02-05 10:33:02,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:02,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:02,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:02,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-05 10:33:02,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:02,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:02,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-05 10:33:02,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:02,289 INFO L124 PetriNetUnfolderBase]: 260/612 cut-off events. [2024-02-05 10:33:02,289 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2024-02-05 10:33:02,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1373 conditions, 612 events. 260/612 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3522 event pairs, 4 based on Foata normal form. 102/668 useless extension candidates. Maximal degree in co-relation 670. Up to 424 conditions per place. [2024-02-05 10:33:02,293 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 35 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2024-02-05 10:33:02,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 237 flow [2024-02-05 10:33:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-02-05 10:33:02,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2024-02-05 10:33:02,294 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 149 flow. Second operand 4 states and 124 transitions. [2024-02-05 10:33:02,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 237 flow [2024-02-05 10:33:02,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:02,298 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 140 flow [2024-02-05 10:33:02,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-02-05 10:33:02,300 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2024-02-05 10:33:02,300 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 140 flow [2024-02-05 10:33:02,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:02,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:02,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:02,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:33:02,301 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:02,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash 93708804, now seen corresponding path program 1 times [2024-02-05 10:33:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:02,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420698390] [2024-02-05 10:33:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:02,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:02,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:02,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420698390] [2024-02-05 10:33:02,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420698390] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:02,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:02,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:02,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218350598] [2024-02-05 10:33:02,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:02,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:02,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-05 10:33:02,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:02,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:02,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-05 10:33:02,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:02,488 INFO L124 PetriNetUnfolderBase]: 314/704 cut-off events. [2024-02-05 10:33:02,488 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2024-02-05 10:33:02,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 704 events. 314/704 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3950 event pairs, 114 based on Foata normal form. 111/750 useless extension candidates. Maximal degree in co-relation 1511. Up to 407 conditions per place. [2024-02-05 10:33:02,492 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 47 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-02-05 10:33:02,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 58 transitions, 309 flow [2024-02-05 10:33:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-02-05 10:33:02,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-02-05 10:33:02,493 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 140 flow. Second operand 4 states and 134 transitions. [2024-02-05 10:33:02,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 58 transitions, 309 flow [2024-02-05 10:33:02,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:02,497 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 133 flow [2024-02-05 10:33:02,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-02-05 10:33:02,498 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2024-02-05 10:33:02,498 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 133 flow [2024-02-05 10:33:02,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:02,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:02,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:02,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:33:02,499 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:02,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:02,500 INFO L85 PathProgramCache]: Analyzing trace with hash -626342598, now seen corresponding path program 1 times [2024-02-05 10:33:02,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:02,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176034049] [2024-02-05 10:33:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:02,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:02,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:02,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176034049] [2024-02-05 10:33:02,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176034049] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:02,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:02,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:02,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492460434] [2024-02-05 10:33:02,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:02,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:02,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:02,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:02,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:02,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:33:02,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:02,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:02,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:33:02,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:02,746 INFO L124 PetriNetUnfolderBase]: 833/1554 cut-off events. [2024-02-05 10:33:02,747 INFO L125 PetriNetUnfolderBase]: For 725/725 co-relation queries the response was YES. [2024-02-05 10:33:02,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3571 conditions, 1554 events. 833/1554 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8959 event pairs, 72 based on Foata normal form. 0/1384 useless extension candidates. Maximal degree in co-relation 3537. Up to 512 conditions per place. [2024-02-05 10:33:02,754 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 68 selfloop transitions, 9 changer transitions 1/84 dead transitions. [2024-02-05 10:33:02,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 84 transitions, 438 flow [2024-02-05 10:33:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:33:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:33:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-02-05 10:33:02,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-02-05 10:33:02,755 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 133 flow. Second operand 5 states and 187 transitions. [2024-02-05 10:33:02,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 84 transitions, 438 flow [2024-02-05 10:33:02,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 84 transitions, 429 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:02,758 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-02-05 10:33:02,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-02-05 10:33:02,760 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2024-02-05 10:33:02,761 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-02-05 10:33:02,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:02,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:02,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:02,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-05 10:33:02,762 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:02,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:02,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1618233992, now seen corresponding path program 2 times [2024-02-05 10:33:02,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:02,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685544701] [2024-02-05 10:33:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:02,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685544701] [2024-02-05 10:33:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685544701] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:02,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:02,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:02,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239762] [2024-02-05 10:33:02,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:02,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:02,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:02,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:02,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:33:02,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:02,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:02,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:33:02,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:03,005 INFO L124 PetriNetUnfolderBase]: 843/1543 cut-off events. [2024-02-05 10:33:03,005 INFO L125 PetriNetUnfolderBase]: For 1302/1302 co-relation queries the response was YES. [2024-02-05 10:33:03,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4146 conditions, 1543 events. 843/1543 cut-off events. For 1302/1302 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8628 event pairs, 105 based on Foata normal form. 6/1537 useless extension candidates. Maximal degree in co-relation 4105. Up to 539 conditions per place. [2024-02-05 10:33:03,014 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 66 selfloop transitions, 11 changer transitions 9/92 dead transitions. [2024-02-05 10:33:03,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 92 transitions, 551 flow [2024-02-05 10:33:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:33:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:33:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-02-05 10:33:03,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-02-05 10:33:03,015 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 5 states and 187 transitions. [2024-02-05 10:33:03,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 92 transitions, 551 flow [2024-02-05 10:33:03,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 92 transitions, 551 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:33:03,018 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 250 flow [2024-02-05 10:33:03,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-02-05 10:33:03,019 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2024-02-05 10:33:03,019 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 250 flow [2024-02-05 10:33:03,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:03,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:03,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:03,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:33:03,020 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:03,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash -18009081, now seen corresponding path program 1 times [2024-02-05 10:33:03,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:03,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509919896] [2024-02-05 10:33:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:03,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:03,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509919896] [2024-02-05 10:33:03,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509919896] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:03,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:03,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:03,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996291765] [2024-02-05 10:33:03,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:03,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:03,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:03,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:03,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:03,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:33:03,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:03,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:03,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:33:03,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:03,240 INFO L124 PetriNetUnfolderBase]: 809/1523 cut-off events. [2024-02-05 10:33:03,241 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2024-02-05 10:33:03,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4393 conditions, 1523 events. 809/1523 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8457 event pairs, 92 based on Foata normal form. 52/1571 useless extension candidates. Maximal degree in co-relation 4342. Up to 716 conditions per place. [2024-02-05 10:33:03,248 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 76 selfloop transitions, 9 changer transitions 5/96 dead transitions. [2024-02-05 10:33:03,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 96 transitions, 641 flow [2024-02-05 10:33:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:33:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:33:03,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-02-05 10:33:03,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-02-05 10:33:03,250 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 250 flow. Second operand 5 states and 187 transitions. [2024-02-05 10:33:03,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 96 transitions, 641 flow [2024-02-05 10:33:03,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 96 transitions, 637 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-05 10:33:03,254 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 301 flow [2024-02-05 10:33:03,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2024-02-05 10:33:03,255 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-02-05 10:33:03,255 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 301 flow [2024-02-05 10:33:03,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:03,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:03,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:03,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-05 10:33:03,255 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:03,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:03,256 INFO L85 PathProgramCache]: Analyzing trace with hash -615138485, now seen corresponding path program 2 times [2024-02-05 10:33:03,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:03,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925477400] [2024-02-05 10:33:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:03,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:03,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925477400] [2024-02-05 10:33:03,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925477400] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:03,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:03,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:03,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242712847] [2024-02-05 10:33:03,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:03,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:03,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:03,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:03,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:33:03,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:03,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:03,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:33:03,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:03,436 INFO L124 PetriNetUnfolderBase]: 699/1274 cut-off events. [2024-02-05 10:33:03,436 INFO L125 PetriNetUnfolderBase]: For 2485/2485 co-relation queries the response was YES. [2024-02-05 10:33:03,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4132 conditions, 1274 events. 699/1274 cut-off events. For 2485/2485 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6594 event pairs, 153 based on Foata normal form. 4/1271 useless extension candidates. Maximal degree in co-relation 4073. Up to 479 conditions per place. [2024-02-05 10:33:03,443 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 64 selfloop transitions, 11 changer transitions 4/85 dead transitions. [2024-02-05 10:33:03,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 623 flow [2024-02-05 10:33:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:33:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:33:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-02-05 10:33:03,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472727272727272 [2024-02-05 10:33:03,444 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 301 flow. Second operand 5 states and 178 transitions. [2024-02-05 10:33:03,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 623 flow [2024-02-05 10:33:03,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 614 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:03,450 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 374 flow [2024-02-05 10:33:03,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2024-02-05 10:33:03,450 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-02-05 10:33:03,450 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 374 flow [2024-02-05 10:33:03,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:03,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:03,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:03,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-05 10:33:03,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:03,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:03,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1141158287, now seen corresponding path program 1 times [2024-02-05 10:33:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:03,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731709890] [2024-02-05 10:33:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:03,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:03,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:03,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731709890] [2024-02-05 10:33:03,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731709890] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:03,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183449760] [2024-02-05 10:33:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:03,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:03,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:03,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:33:03,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-05 10:33:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:03,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:33:03,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:04,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:04,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183449760] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:04,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:04,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-02-05 10:33:04,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428266611] [2024-02-05 10:33:04,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:04,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:33:04,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:04,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:33:04,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:33:04,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:33:04,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 374 flow. Second operand has 14 states, 14 states have (on average 27.857142857142858) internal successors, (390), 14 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:04,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:04,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:33:04,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:04,851 INFO L124 PetriNetUnfolderBase]: 1013/2050 cut-off events. [2024-02-05 10:33:04,851 INFO L125 PetriNetUnfolderBase]: For 4346/4374 co-relation queries the response was YES. [2024-02-05 10:33:04,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 2050 events. 1013/2050 cut-off events. For 4346/4374 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13128 event pairs, 170 based on Foata normal form. 8/1909 useless extension candidates. Maximal degree in co-relation 6799. Up to 645 conditions per place. [2024-02-05 10:33:04,862 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 130 selfloop transitions, 34 changer transitions 8/191 dead transitions. [2024-02-05 10:33:04,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 191 transitions, 1397 flow [2024-02-05 10:33:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-05 10:33:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-05 10:33:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 467 transitions. [2024-02-05 10:33:04,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064935064935065 [2024-02-05 10:33:04,863 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 374 flow. Second operand 14 states and 467 transitions. [2024-02-05 10:33:04,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 191 transitions, 1397 flow [2024-02-05 10:33:04,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 191 transitions, 1389 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-02-05 10:33:04,873 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 729 flow [2024-02-05 10:33:04,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=729, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2024-02-05 10:33:04,874 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 40 predicate places. [2024-02-05 10:33:04,874 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 729 flow [2024-02-05 10:33:04,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.857142857142858) internal successors, (390), 14 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:04,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:04,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:04,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-05 10:33:05,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-05 10:33:05,086 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:05,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:05,086 INFO L85 PathProgramCache]: Analyzing trace with hash -972059071, now seen corresponding path program 2 times [2024-02-05 10:33:05,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:05,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534742181] [2024-02-05 10:33:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:05,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:05,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:05,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534742181] [2024-02-05 10:33:05,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534742181] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:05,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590578444] [2024-02-05 10:33:05,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:33:05,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:05,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:05,378 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:33:05,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-05 10:33:05,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:33:05,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:05,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:33:05,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:05,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:10,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590578444] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:10,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:10,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-02-05 10:33:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493220881] [2024-02-05 10:33:10,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:33:10,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:33:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=127, Unknown=1, NotChecked=0, Total=182 [2024-02-05 10:33:14,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:33:18,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:33:18,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 55 [2024-02-05 10:33:18,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 729 flow. Second operand has 14 states, 14 states have (on average 22.214285714285715) internal successors, (311), 14 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:18,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:18,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 55 [2024-02-05 10:33:18,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:19,940 INFO L124 PetriNetUnfolderBase]: 2868/5576 cut-off events. [2024-02-05 10:33:19,940 INFO L125 PetriNetUnfolderBase]: For 18706/18860 co-relation queries the response was YES. [2024-02-05 10:33:19,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21091 conditions, 5576 events. 2868/5576 cut-off events. For 18706/18860 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 39769 event pairs, 405 based on Foata normal form. 60/5579 useless extension candidates. Maximal degree in co-relation 21006. Up to 931 conditions per place. [2024-02-05 10:33:19,985 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 286 selfloop transitions, 82 changer transitions 13/393 dead transitions. [2024-02-05 10:33:19,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 393 transitions, 3511 flow [2024-02-05 10:33:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-05 10:33:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-05 10:33:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 598 transitions. [2024-02-05 10:33:19,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436363636363636 [2024-02-05 10:33:19,987 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 729 flow. Second operand 20 states and 598 transitions. [2024-02-05 10:33:19,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 393 transitions, 3511 flow [2024-02-05 10:33:20,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 393 transitions, 3383 flow, removed 64 selfloop flow, removed 0 redundant places. [2024-02-05 10:33:20,042 INFO L231 Difference]: Finished difference. Result has 125 places, 149 transitions, 1411 flow [2024-02-05 10:33:20,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1411, PETRI_PLACES=125, PETRI_TRANSITIONS=149} [2024-02-05 10:33:20,044 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 71 predicate places. [2024-02-05 10:33:20,044 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 149 transitions, 1411 flow [2024-02-05 10:33:20,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.214285714285715) internal successors, (311), 14 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:20,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:20,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:20,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-05 10:33:20,256 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,SelfDestructingSolverStorable14 [2024-02-05 10:33:20,256 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:20,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:20,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1412831241, now seen corresponding path program 3 times [2024-02-05 10:33:20,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:20,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985155927] [2024-02-05 10:33:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:20,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:20,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985155927] [2024-02-05 10:33:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985155927] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354341888] [2024-02-05 10:33:20,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:33:20,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:20,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:20,568 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:33:20,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-05 10:33:20,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-05 10:33:20,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:20,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:33:20,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:20,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:21,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354341888] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:21,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:21,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-02-05 10:33:21,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553449725] [2024-02-05 10:33:21,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:21,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:33:21,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:33:21,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:33:21,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 55 [2024-02-05 10:33:21,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 149 transitions, 1411 flow. Second operand has 14 states, 14 states have (on average 29.0) internal successors, (406), 14 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:21,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:21,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 55 [2024-02-05 10:33:21,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:23,162 INFO L124 PetriNetUnfolderBase]: 3828/7770 cut-off events. [2024-02-05 10:33:23,163 INFO L125 PetriNetUnfolderBase]: For 34741/35109 co-relation queries the response was YES. [2024-02-05 10:33:23,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33065 conditions, 7770 events. 3828/7770 cut-off events. For 34741/35109 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 60315 event pairs, 532 based on Foata normal form. 96/7675 useless extension candidates. Maximal degree in co-relation 32960. Up to 1612 conditions per place. [2024-02-05 10:33:23,211 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 219 selfloop transitions, 125 changer transitions 3/366 dead transitions. [2024-02-05 10:33:23,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 366 transitions, 3735 flow [2024-02-05 10:33:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-05 10:33:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-05 10:33:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 636 transitions. [2024-02-05 10:33:23,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086124401913876 [2024-02-05 10:33:23,214 INFO L175 Difference]: Start difference. First operand has 125 places, 149 transitions, 1411 flow. Second operand 19 states and 636 transitions. [2024-02-05 10:33:23,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 366 transitions, 3735 flow [2024-02-05 10:33:23,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 366 transitions, 3590 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-02-05 10:33:23,334 INFO L231 Difference]: Finished difference. Result has 147 places, 222 transitions, 2498 flow [2024-02-05 10:33:23,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2498, PETRI_PLACES=147, PETRI_TRANSITIONS=222} [2024-02-05 10:33:23,335 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 93 predicate places. [2024-02-05 10:33:23,335 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 222 transitions, 2498 flow [2024-02-05 10:33:23,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 29.0) internal successors, (406), 14 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:23,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:23,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:23,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-05 10:33:23,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:23,547 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:23,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2009562740, now seen corresponding path program 1 times [2024-02-05 10:33:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:23,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390692618] [2024-02-05 10:33:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:23,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:23,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390692618] [2024-02-05 10:33:23,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390692618] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:23,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409054253] [2024-02-05 10:33:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:23,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:23,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:23,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:33:23,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-05 10:33:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:24,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-05 10:33:24,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:24,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:24,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409054253] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:24,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:24,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-02-05 10:33:24,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608492579] [2024-02-05 10:33:24,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:24,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-05 10:33:24,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-05 10:33:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-02-05 10:33:25,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:33:25,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 222 transitions, 2498 flow. Second operand has 19 states, 19 states have (on average 27.263157894736842) internal successors, (518), 19 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:25,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:25,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:33:25,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:28,314 INFO L124 PetriNetUnfolderBase]: 4852/9837 cut-off events. [2024-02-05 10:33:28,315 INFO L125 PetriNetUnfolderBase]: For 60029/60549 co-relation queries the response was YES. [2024-02-05 10:33:28,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45345 conditions, 9837 events. 4852/9837 cut-off events. For 60029/60549 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 80501 event pairs, 794 based on Foata normal form. 125/9694 useless extension candidates. Maximal degree in co-relation 45228. Up to 4692 conditions per place. [2024-02-05 10:33:28,438 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 298 selfloop transitions, 154 changer transitions 7/478 dead transitions. [2024-02-05 10:33:28,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 478 transitions, 5350 flow [2024-02-05 10:33:28,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-05 10:33:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-05 10:33:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 903 transitions. [2024-02-05 10:33:28,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2024-02-05 10:33:28,442 INFO L175 Difference]: Start difference. First operand has 147 places, 222 transitions, 2498 flow. Second operand 28 states and 903 transitions. [2024-02-05 10:33:28,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 478 transitions, 5350 flow [2024-02-05 10:33:28,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 478 transitions, 5115 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-02-05 10:33:28,634 INFO L231 Difference]: Finished difference. Result has 174 places, 293 transitions, 3586 flow [2024-02-05 10:33:28,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3586, PETRI_PLACES=174, PETRI_TRANSITIONS=293} [2024-02-05 10:33:28,635 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 120 predicate places. [2024-02-05 10:33:28,635 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 293 transitions, 3586 flow [2024-02-05 10:33:28,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.263157894736842) internal successors, (518), 19 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:28,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:28,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:28,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-05 10:33:28,840 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,SelfDestructingSolverStorable16 [2024-02-05 10:33:28,840 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:28,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:28,841 INFO L85 PathProgramCache]: Analyzing trace with hash 798874454, now seen corresponding path program 2 times [2024-02-05 10:33:28,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:28,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300872875] [2024-02-05 10:33:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:28,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:29,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:29,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300872875] [2024-02-05 10:33:29,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300872875] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76116613] [2024-02-05 10:33:29,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:33:29,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:29,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:29,328 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) [2024-02-05 10:33:29,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-05 10:33:29,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:33:29,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:29,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-05 10:33:29,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:30,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-05 10:33:30,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76116613] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:30,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:30,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-02-05 10:33:30,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611173897] [2024-02-05 10:33:30,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:30,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-05 10:33:30,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:30,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-05 10:33:30,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-02-05 10:33:30,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:33:30,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 293 transitions, 3586 flow. Second operand has 19 states, 19 states have (on average 27.157894736842106) internal successors, (516), 19 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:30,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:30,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:33:30,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:35,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:33:38,803 INFO L124 PetriNetUnfolderBase]: 6132/12496 cut-off events. [2024-02-05 10:33:38,803 INFO L125 PetriNetUnfolderBase]: For 101392/102112 co-relation queries the response was YES. [2024-02-05 10:33:38,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60484 conditions, 12496 events. 6132/12496 cut-off events. For 101392/102112 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 107994 event pairs, 968 based on Foata normal form. 220/12388 useless extension candidates. Maximal degree in co-relation 60356. Up to 4477 conditions per place. [2024-02-05 10:33:38,916 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 397 selfloop transitions, 190 changer transitions 9/615 dead transitions. [2024-02-05 10:33:38,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 615 transitions, 7438 flow [2024-02-05 10:33:38,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-05 10:33:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-05 10:33:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1019 transitions. [2024-02-05 10:33:38,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5976539589442815 [2024-02-05 10:33:38,919 INFO L175 Difference]: Start difference. First operand has 174 places, 293 transitions, 3586 flow. Second operand 31 states and 1019 transitions. [2024-02-05 10:33:38,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 615 transitions, 7438 flow [2024-02-05 10:33:39,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 615 transitions, 6799 flow, removed 254 selfloop flow, removed 7 redundant places. [2024-02-05 10:33:39,312 INFO L231 Difference]: Finished difference. Result has 214 places, 378 transitions, 4862 flow [2024-02-05 10:33:39,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3243, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4862, PETRI_PLACES=214, PETRI_TRANSITIONS=378} [2024-02-05 10:33:39,313 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 160 predicate places. [2024-02-05 10:33:39,313 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 378 transitions, 4862 flow [2024-02-05 10:33:39,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.157894736842106) internal successors, (516), 19 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:39,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:39,314 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:39,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-05 10:33:39,529 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,SelfDestructingSolverStorable17 [2024-02-05 10:33:39,529 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:39,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash -875653574, now seen corresponding path program 3 times [2024-02-05 10:33:39,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:39,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044752207] [2024-02-05 10:33:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:39,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:40,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:40,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044752207] [2024-02-05 10:33:40,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044752207] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:40,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720054450] [2024-02-05 10:33:40,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:33:40,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:40,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:40,048 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) [2024-02-05 10:33:40,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-05 10:33:40,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-05 10:33:40,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:40,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-05 10:33:40,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:40,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-05 10:33:40,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720054450] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:40,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:40,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-02-05 10:33:40,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482777511] [2024-02-05 10:33:40,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:40,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-05 10:33:40,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:40,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-05 10:33:40,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-02-05 10:33:41,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:33:41,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 378 transitions, 4862 flow. Second operand has 19 states, 19 states have (on average 27.157894736842106) internal successors, (516), 19 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:41,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:41,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:33:41,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:45,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:33:49,291 INFO L124 PetriNetUnfolderBase]: 7293/14782 cut-off events. [2024-02-05 10:33:49,291 INFO L125 PetriNetUnfolderBase]: For 158744/159668 co-relation queries the response was YES. [2024-02-05 10:33:49,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75166 conditions, 14782 events. 7293/14782 cut-off events. For 158744/159668 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 131939 event pairs, 1238 based on Foata normal form. 289/14679 useless extension candidates. Maximal degree in co-relation 75022. Up to 4696 conditions per place. [2024-02-05 10:33:49,451 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 362 selfloop transitions, 236 changer transitions 8/625 dead transitions. [2024-02-05 10:33:49,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 625 transitions, 8394 flow [2024-02-05 10:33:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-05 10:33:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-05 10:33:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 846 transitions. [2024-02-05 10:33:49,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916083916083916 [2024-02-05 10:33:49,456 INFO L175 Difference]: Start difference. First operand has 214 places, 378 transitions, 4862 flow. Second operand 26 states and 846 transitions. [2024-02-05 10:33:49,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 625 transitions, 8394 flow [2024-02-05 10:33:50,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 625 transitions, 7967 flow, removed 127 selfloop flow, removed 9 redundant places. [2024-02-05 10:33:50,445 INFO L231 Difference]: Finished difference. Result has 242 places, 446 transitions, 6307 flow [2024-02-05 10:33:50,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6307, PETRI_PLACES=242, PETRI_TRANSITIONS=446} [2024-02-05 10:33:50,446 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 188 predicate places. [2024-02-05 10:33:50,446 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 446 transitions, 6307 flow [2024-02-05 10:33:50,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.157894736842106) internal successors, (516), 19 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:50,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:50,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:50,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-05 10:33:50,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:50,658 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:33:50,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:50,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1623958864, now seen corresponding path program 4 times [2024-02-05 10:33:50,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:50,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879056999] [2024-02-05 10:33:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:50,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:50,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:50,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879056999] [2024-02-05 10:33:50,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879056999] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:50,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985899674] [2024-02-05 10:33:50,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:33:50,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:50,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:50,983 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) [2024-02-05 10:33:51,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-05 10:33:51,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:33:51,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:51,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-05 10:33:51,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:51,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:33:51,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985899674] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:51,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:51,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-02-05 10:33:51,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279217454] [2024-02-05 10:33:51,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:51,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-05 10:33:51,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-05 10:33:51,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-02-05 10:33:52,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:33:52,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 446 transitions, 6307 flow. Second operand has 19 states, 19 states have (on average 27.263157894736842) internal successors, (518), 19 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:52,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:52,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:33:52,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:58,218 INFO L124 PetriNetUnfolderBase]: 10342/21312 cut-off events. [2024-02-05 10:33:58,219 INFO L125 PetriNetUnfolderBase]: For 288846/290122 co-relation queries the response was YES. [2024-02-05 10:33:58,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112955 conditions, 21312 events. 10342/21312 cut-off events. For 288846/290122 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 204791 event pairs, 706 based on Foata normal form. 628/21604 useless extension candidates. Maximal degree in co-relation 112798. Up to 3601 conditions per place. [2024-02-05 10:33:58,526 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 373 selfloop transitions, 496 changer transitions 12/900 dead transitions. [2024-02-05 10:33:58,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 900 transitions, 13147 flow [2024-02-05 10:33:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-05 10:33:58,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-05 10:33:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1089 transitions. [2024-02-05 10:33:58,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823529411764706 [2024-02-05 10:33:58,529 INFO L175 Difference]: Start difference. First operand has 242 places, 446 transitions, 6307 flow. Second operand 34 states and 1089 transitions. [2024-02-05 10:33:58,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 900 transitions, 13147 flow [2024-02-05 10:34:00,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 900 transitions, 12680 flow, removed 216 selfloop flow, removed 8 redundant places. [2024-02-05 10:34:00,342 INFO L231 Difference]: Finished difference. Result has 282 places, 676 transitions, 11408 flow [2024-02-05 10:34:00,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=6058, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=11408, PETRI_PLACES=282, PETRI_TRANSITIONS=676} [2024-02-05 10:34:00,342 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 228 predicate places. [2024-02-05 10:34:00,343 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 676 transitions, 11408 flow [2024-02-05 10:34:00,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.263157894736842) internal successors, (518), 19 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:34:00,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:34:00,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:34:00,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-05 10:34:00,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:00,555 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:34:00,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:34:00,555 INFO L85 PathProgramCache]: Analyzing trace with hash 693014936, now seen corresponding path program 5 times [2024-02-05 10:34:00,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:34:00,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110146336] [2024-02-05 10:34:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:34:00,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:34:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:34:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:00,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:34:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110146336] [2024-02-05 10:34:00,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110146336] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:34:00,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580362268] [2024-02-05 10:34:00,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:34:00,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:34:00,996 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) [2024-02-05 10:34:01,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-05 10:34:01,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-05 10:34:01,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:34:01,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-05 10:34:01,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:34:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:01,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:34:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:34:01,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580362268] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:34:01,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:34:01,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-02-05 10:34:01,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736697799] [2024-02-05 10:34:01,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:34:01,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-05 10:34:01,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:34:01,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-05 10:34:01,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-02-05 10:34:02,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 55 [2024-02-05 10:34:02,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 676 transitions, 11408 flow. Second operand has 19 states, 19 states have (on average 28.263157894736842) internal successors, (537), 19 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:34:02,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:34:02,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 55 [2024-02-05 10:34:02,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:34:10,351 INFO L124 PetriNetUnfolderBase]: 12584/25783 cut-off events. [2024-02-05 10:34:10,352 INFO L125 PetriNetUnfolderBase]: For 439909/442045 co-relation queries the response was YES. [2024-02-05 10:34:10,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150086 conditions, 25783 events. 12584/25783 cut-off events. For 439909/442045 co-relation queries the response was YES. Maximal size of possible extension queue 1363. Compared 254987 event pairs, 888 based on Foata normal form. 1190/26527 useless extension candidates. Maximal degree in co-relation 149912. Up to 6162 conditions per place. [2024-02-05 10:34:10,694 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 455 selfloop transitions, 586 changer transitions 9/1069 dead transitions. [2024-02-05 10:34:10,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1069 transitions, 18732 flow [2024-02-05 10:34:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-05 10:34:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-05 10:34:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1255 transitions. [2024-02-05 10:34:10,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6004784688995215 [2024-02-05 10:34:10,698 INFO L175 Difference]: Start difference. First operand has 282 places, 676 transitions, 11408 flow. Second operand 38 states and 1255 transitions. [2024-02-05 10:34:10,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1069 transitions, 18732 flow [2024-02-05 10:34:15,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1069 transitions, 17246 flow, removed 728 selfloop flow, removed 8 redundant places. [2024-02-05 10:34:15,465 INFO L231 Difference]: Finished difference. Result has 330 places, 833 transitions, 15786 flow [2024-02-05 10:34:15,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=10709, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=15786, PETRI_PLACES=330, PETRI_TRANSITIONS=833} [2024-02-05 10:34:15,466 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 276 predicate places. [2024-02-05 10:34:15,466 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 833 transitions, 15786 flow [2024-02-05 10:34:15,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 28.263157894736842) internal successors, (537), 19 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:34:15,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:34:15,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:34:15,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-05 10:34:15,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-02-05 10:34:15,678 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 25 more)] === [2024-02-05 10:34:15,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:34:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1222525763, now seen corresponding path program 6 times [2024-02-05 10:34:15,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:34:15,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850624214] [2024-02-05 10:34:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:34:15,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:34:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:34:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:34:15,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:34:15,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850624214] [2024-02-05 10:34:15,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850624214] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:34:15,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246288655] [2024-02-05 10:34:15,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:34:15,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:15,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:34:15,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:34:15,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-05 10:34:15,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-05 10:34:15,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:34:15,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-05 10:34:15,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:34:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:34:15,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:34:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:34:16,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246288655] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:34:16,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:34:16,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-02-05 10:34:16,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197958708] [2024-02-05 10:34:16,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:34:16,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-05 10:34:16,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:34:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-05 10:34:16,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-02-05 10:34:16,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-05 10:34:16,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 833 transitions, 15786 flow. Second operand has 10 states, 10 states have (on average 28.9) internal successors, (289), 10 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:34:16,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:34:16,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-05 10:34:16,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:34:38,707 INFO L124 PetriNetUnfolderBase]: 39597/71784 cut-off events. [2024-02-05 10:34:38,707 INFO L125 PetriNetUnfolderBase]: For 1026792/1031390 co-relation queries the response was YES. [2024-02-05 10:34:40,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403870 conditions, 71784 events. 39597/71784 cut-off events. For 1026792/1031390 co-relation queries the response was YES. Maximal size of possible extension queue 3343. Compared 717576 event pairs, 4084 based on Foata normal form. 4446/76180 useless extension candidates. Maximal degree in co-relation 403677. Up to 18775 conditions per place. [2024-02-05 10:34:40,734 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 2645 selfloop transitions, 46 changer transitions 38/2843 dead transitions. [2024-02-05 10:34:40,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 2843 transitions, 60925 flow [2024-02-05 10:34:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-05 10:34:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-05 10:34:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 451 transitions. [2024-02-05 10:34:40,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-02-05 10:34:40,736 INFO L175 Difference]: Start difference. First operand has 330 places, 833 transitions, 15786 flow. Second operand 13 states and 451 transitions. [2024-02-05 10:34:40,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 2843 transitions, 60925 flow