./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.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/popl20-figure3.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/popl20-figure3.wvr.c ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/popl20-figure3.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 10:35:12,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:35:12,765 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:35:12,769 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:35:12,770 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:35:12,800 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:35:12,801 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:35:12,802 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:35:12,802 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:35:12,806 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:35:12,806 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:35:12,806 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:35:12,807 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:35:12,808 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:35:12,808 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:35:12,808 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:35:12,808 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:35:12,809 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:35:12,809 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:35:12,809 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:35:12,809 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:35:12,810 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:35:12,810 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:35:12,810 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:35:12,810 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:35:12,811 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:35:12,811 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:35:12,811 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:35:12,812 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:35:12,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:35:12,813 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:35:12,813 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:35:12,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:35:12,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:35:12,813 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:35:12,814 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:35:12,814 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:35:12,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:35:12,814 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:35:12,814 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:35:12,814 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:35:12,815 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:35:12,815 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:35:12,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:35:13,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:35:13,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:35:13,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:35:13,089 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:35:13,089 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:35:13,090 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-02-05 10:35:14,196 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:35:14,345 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:35:14,345 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-02-05 10:35:14,352 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a206728f7/d31e32a6c2fc4f4997a30db0191167b4/FLAG29db3e831 [2024-02-05 10:35:14,362 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a206728f7/d31e32a6c2fc4f4997a30db0191167b4 [2024-02-05 10:35:14,364 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:35:14,364 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:35:14,365 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/popl20-figure3.wvr.yml/witness.yml [2024-02-05 10:35:14,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:35:14,441 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:35:14,442 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:35:14,442 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:35:14,446 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:35:14,446 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:35:14" (1/2) ... [2024-02-05 10:35:14,447 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78268105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:35:14, skipping insertion in model container [2024-02-05 10:35:14,447 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:35:14" (1/2) ... [2024-02-05 10:35:14,448 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30f750de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:35:14, skipping insertion in model container [2024-02-05 10:35:14,449 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:35:14" (2/2) ... [2024-02-05 10:35:14,449 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78268105 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:35:14, skipping insertion in model container [2024-02-05 10:35:14,449 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:35:14" (2/2) ... [2024-02-05 10:35:14,449 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:35:14,466 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:35:14,467 INFO L101 nessWitnessExtractor]: Loop invariant at [L41-L41] ((unsigned long )_argptr == 0UL) && ((((((((((((i == 11U || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || 12U <= i) [2024-02-05 10:35:14,467 INFO L101 nessWitnessExtractor]: Location invariant before [L65-L65] ((((((0LL - (long long )c) + (long long )counter >= 0LL) && ((long long )c + (long long )counter >= 0LL)) && ((0LL - (long long )c) - (long long )counter >= 0LL)) && ((long long )c - (long long )counter >= 0LL)) && (counter == 0U)) && (c == 0U) [2024-02-05 10:35:14,467 INFO L101 nessWitnessExtractor]: Location invariant before [L55-L55] ((unsigned long )_argptr == 0UL) && ((((((((((i == 9U || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (10U <= i && i <= 4294967294U)) [2024-02-05 10:35:14,467 INFO L101 nessWitnessExtractor]: Location invariant before [L44-L44] ((unsigned long )_argptr == 0UL) && ((((((((((((i == 11U || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (12U <= i && i <= 4294967294U)) [2024-02-05 10:35:14,467 INFO L101 nessWitnessExtractor]: Location invariant before [L43-L43] ((unsigned long )_argptr == 0UL) && ((((((((((((i == 11U || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (12U <= i && i <= 4294967294U)) [2024-02-05 10:35:14,468 INFO L101 nessWitnessExtractor]: Location invariant before [L64-L64] (((((((0LL - (long long )c) + (long long )counter >= 0LL) && ((long long )c + (long long )counter >= 0LL)) && ((0LL - (long long )c) - (long long )counter >= 0LL)) && ((long long )c - (long long )counter >= 0LL)) && (N == 0U)) && (counter == 0U)) && (c == 0U) [2024-02-05 10:35:14,468 INFO L101 nessWitnessExtractor]: Location invariant before [L53-L53] ((unsigned long )_argptr == 0UL) && ((((((((((i == 9U || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (10U <= i && i <= 4294967294U)) [2024-02-05 10:35:14,468 INFO L101 nessWitnessExtractor]: Location invariant before [L70-L70] counter == 0U [2024-02-05 10:35:14,468 INFO L101 nessWitnessExtractor]: Location invariant before [L42-L42] ((unsigned long )_argptr == 0UL) && ((((((((((((i == 11U || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (12U <= i && i <= 4294967294U)) [2024-02-05 10:35:14,468 INFO L101 nessWitnessExtractor]: Location invariant before [L47-L47] (unsigned long )_argptr == 0UL [2024-02-05 10:35:14,468 INFO L101 nessWitnessExtractor]: Loop invariant at [L51-L51] ((unsigned long )_argptr == 0UL) && ((((((((((i == 9U || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || 10U <= i) [2024-02-05 10:35:14,468 INFO L101 nessWitnessExtractor]: Location invariant before [L58-L58] (unsigned long )_argptr == 0UL [2024-02-05 10:35:14,468 INFO L101 nessWitnessExtractor]: Location invariant before [L67-L67] counter == 0U [2024-02-05 10:35:14,468 INFO L101 nessWitnessExtractor]: Location invariant before [L54-L54] ((unsigned long )_argptr == 0UL) && ((((((((((i == 9U || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (10U <= i && i <= 4294967294U)) [2024-02-05 10:35:14,468 INFO L101 nessWitnessExtractor]: Location invariant before [L52-L52] ((unsigned long )_argptr == 0UL) && ((((((((((i == 9U || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) || (10U <= i && i <= 4294967294U)) [2024-02-05 10:35:14,490 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:35:14,648 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/popl20-figure3.wvr.c[2147,2160] [2024-02-05 10:35:14,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:35:14,668 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 [2024-02-05 10:35:14,741 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/popl20-figure3.wvr.c[2147,2160] [2024-02-05 10:35:14,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:35:14,756 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:35:14,757 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:35:14 WrapperNode [2024-02-05 10:35:14,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:35:14,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:35:14,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:35:14,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:35:14,763 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,770 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,797 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 85 [2024-02-05 10:35:14,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:35:14,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:35:14,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:35:14,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:35:14,806 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,806 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,808 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,821 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 10:35:14,821 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,821 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,827 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,840 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,842 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,843 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,845 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:35:14,846 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:35:14,846 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:35:14,846 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:35:14,846 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 10:35:14" (1/1) ... [2024-02-05 10:35:14,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:35:14,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:14,871 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 10:35:14,887 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 10:35:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:35:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-05 10:35:14,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-05 10:35:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-05 10:35:14,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-05 10:35:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:35:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:35:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:35:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:35:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:35:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:35:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:35:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-05 10:35:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-05 10:35:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:35:14,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:35:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-05 10:35:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-05 10:35:14,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-05 10:35:14,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:35:14,917 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 10:35:15,053 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:35:15,055 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:35:15,354 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:35:15,354 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:35:15,473 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:35:15,473 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-05 10:35:15,474 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:35:15 BoogieIcfgContainer [2024-02-05 10:35:15,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:35:15,478 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:35:15,478 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:35:15,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:35:15,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:35:14" (1/4) ... [2024-02-05 10:35:15,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515dcf1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:35:15, skipping insertion in model container [2024-02-05 10:35:15,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:35:14" (2/4) ... [2024-02-05 10:35:15,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515dcf1f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:35:15, skipping insertion in model container [2024-02-05 10:35:15,482 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 10:35:14" (3/4) ... [2024-02-05 10:35:15,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515dcf1f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:35:15, skipping insertion in model container [2024-02-05 10:35:15,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:35:15" (4/4) ... [2024-02-05 10:35:15,484 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-02-05 10:35:15,498 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:35:15,498 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-02-05 10:35:15,498 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:35:15,572 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-05 10:35:15,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 48 transitions, 110 flow [2024-02-05 10:35:15,638 INFO L124 PetriNetUnfolderBase]: 2/46 cut-off events. [2024-02-05 10:35:15,639 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:35:15,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 2/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 95 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-02-05 10:35:15,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 48 transitions, 110 flow [2024-02-05 10:35:15,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 45 transitions, 102 flow [2024-02-05 10:35:15,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:35:15,662 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;@30c85236, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:35:15,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-02-05 10:35:15,666 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:35:15,666 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:35:15,666 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:35:15,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:15,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:35:15,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:15,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:15,672 INFO L85 PathProgramCache]: Analyzing trace with hash 10013, now seen corresponding path program 1 times [2024-02-05 10:35:15,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:15,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926744069] [2024-02-05 10:35:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:15,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:16,099 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 10:35:16,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:16,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926744069] [2024-02-05 10:35:16,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926744069] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:16,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:16,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:35:16,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502275392] [2024-02-05 10:35:16,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:16,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:35:16,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:16,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:35:16,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:35:16,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-02-05 10:35:16,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 10:35:16,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:16,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-02-05 10:35:16,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:16,324 INFO L124 PetriNetUnfolderBase]: 176/373 cut-off events. [2024-02-05 10:35:16,324 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-02-05 10:35:16,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 373 events. 176/373 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1786 event pairs, 144 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 620. Up to 312 conditions per place. [2024-02-05 10:35:16,329 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 28 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-02-05 10:35:16,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 154 flow [2024-02-05 10:35:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:35:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:35:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-02-05 10:35:16,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-02-05 10:35:16,340 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 102 flow. Second operand 3 states and 73 transitions. [2024-02-05 10:35:16,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 154 flow [2024-02-05 10:35:16,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-05 10:35:16,347 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 90 flow [2024-02-05 10:35:16,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-02-05 10:35:16,352 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-02-05 10:35:16,353 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 90 flow [2024-02-05 10:35:16,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 10:35:16,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:16,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-05 10:35:16,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:35:16,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:16,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:16,354 INFO L85 PathProgramCache]: Analyzing trace with hash 310724, now seen corresponding path program 1 times [2024-02-05 10:35:16,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:16,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635393320] [2024-02-05 10:35:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:16,425 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 10:35:16,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:16,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635393320] [2024-02-05 10:35:16,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635393320] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:16,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:16,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:35:16,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636357999] [2024-02-05 10:35:16,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:16,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:35:16,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:35:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:35:16,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-02-05 10:35:16,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 10:35:16,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:16,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-02-05 10:35:16,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:16,544 INFO L124 PetriNetUnfolderBase]: 133/282 cut-off events. [2024-02-05 10:35:16,545 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:35:16,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 282 events. 133/282 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1355 event pairs, 105 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 523. Up to 237 conditions per place. [2024-02-05 10:35:16,547 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 25 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-02-05 10:35:16,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 142 flow [2024-02-05 10:35:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:35:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:35:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-02-05 10:35:16,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-02-05 10:35:16,549 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 90 flow. Second operand 3 states and 76 transitions. [2024-02-05 10:35:16,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 142 flow [2024-02-05 10:35:16,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:35:16,550 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 88 flow [2024-02-05 10:35:16,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2024-02-05 10:35:16,550 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-02-05 10:35:16,551 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 88 flow [2024-02-05 10:35:16,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 10:35:16,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:16,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-05 10:35:16,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:35:16,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:16,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:16,551 INFO L85 PathProgramCache]: Analyzing trace with hash 9632742, now seen corresponding path program 1 times [2024-02-05 10:35:16,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:16,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067924864] [2024-02-05 10:35:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:16,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:16,569 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 10:35:16,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:16,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067924864] [2024-02-05 10:35:16,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067924864] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:16,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:16,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:35:16,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757398727] [2024-02-05 10:35:16,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:16,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:35:16,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:16,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:35:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:35:16,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-02-05 10:35:16,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 10:35:16,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:16,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-02-05 10:35:16,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:16,664 INFO L124 PetriNetUnfolderBase]: 196/444 cut-off events. [2024-02-05 10:35:16,664 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-05 10:35:16,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 444 events. 196/444 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2378 event pairs, 82 based on Foata normal form. 1/378 useless extension candidates. Maximal degree in co-relation 805. Up to 209 conditions per place. [2024-02-05 10:35:16,666 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 36 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2024-02-05 10:35:16,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 193 flow [2024-02-05 10:35:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:35:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:35:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-02-05 10:35:16,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-02-05 10:35:16,668 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 88 flow. Second operand 3 states and 94 transitions. [2024-02-05 10:35:16,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 193 flow [2024-02-05 10:35:16,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 52 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:35:16,669 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 94 flow [2024-02-05 10:35:16,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-02-05 10:35:16,670 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2024-02-05 10:35:16,670 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 94 flow [2024-02-05 10:35:16,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 10:35:16,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:16,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:35:16,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:35:16,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:16,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:16,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1172044969, now seen corresponding path program 1 times [2024-02-05 10:35:16,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:16,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612685039] [2024-02-05 10:35:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:16,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:16,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:16,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612685039] [2024-02-05 10:35:16,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612685039] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:16,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:16,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:35:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501636765] [2024-02-05 10:35:16,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:16,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:35:16,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:35:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:35:16,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-02-05 10:35:16,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:35:16,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:16,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-02-05 10:35:16,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:16,894 INFO L124 PetriNetUnfolderBase]: 211/487 cut-off events. [2024-02-05 10:35:16,895 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-02-05 10:35:16,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 487 events. 211/487 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2659 event pairs, 102 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 414. Up to 362 conditions per place. [2024-02-05 10:35:16,897 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 32 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2024-02-05 10:35:16,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 173 flow [2024-02-05 10:35:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:35:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:35:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-02-05 10:35:16,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-02-05 10:35:16,898 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 94 flow. Second operand 4 states and 99 transitions. [2024-02-05 10:35:16,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 173 flow [2024-02-05 10:35:16,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:35:16,900 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 92 flow [2024-02-05 10:35:16,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-02-05 10:35:16,900 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2024-02-05 10:35:16,900 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 92 flow [2024-02-05 10:35:16,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:35:16,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:16,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:35:16,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:35:16,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:16,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:16,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1053794060, now seen corresponding path program 1 times [2024-02-05 10:35:16,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:16,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76695000] [2024-02-05 10:35:16,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:16,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:17,030 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 10:35:17,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:17,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76695000] [2024-02-05 10:35:17,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76695000] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:17,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:17,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:35:17,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767501390] [2024-02-05 10:35:17,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:17,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:35:17,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:17,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:35:17,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:35:17,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-02-05 10:35:17,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 10:35:17,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:17,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-02-05 10:35:17,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:17,144 INFO L124 PetriNetUnfolderBase]: 246/459 cut-off events. [2024-02-05 10:35:17,144 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-02-05 10:35:17,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 459 events. 246/459 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2112 event pairs, 23 based on Foata normal form. 26/451 useless extension candidates. Maximal degree in co-relation 833. Up to 201 conditions per place. [2024-02-05 10:35:17,147 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 42 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2024-02-05 10:35:17,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 220 flow [2024-02-05 10:35:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:35:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:35:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-02-05 10:35:17,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-02-05 10:35:17,148 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 92 flow. Second operand 4 states and 99 transitions. [2024-02-05 10:35:17,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 220 flow [2024-02-05 10:35:17,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 217 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:35:17,150 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 108 flow [2024-02-05 10:35:17,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-02-05 10:35:17,150 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-02-05 10:35:17,150 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 108 flow [2024-02-05 10:35:17,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 10:35:17,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:17,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:35:17,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:35:17,151 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:17,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1053136094, now seen corresponding path program 1 times [2024-02-05 10:35:17,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:17,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716022534] [2024-02-05 10:35:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:17,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:17,273 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 10:35:17,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:17,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716022534] [2024-02-05 10:35:17,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716022534] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:17,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:17,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:35:17,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69203761] [2024-02-05 10:35:17,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:17,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:35:17,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:17,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:35:17,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:35:17,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-02-05 10:35:17,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 10:35:17,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:17,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-02-05 10:35:17,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:17,373 INFO L124 PetriNetUnfolderBase]: 189/411 cut-off events. [2024-02-05 10:35:17,373 INFO L125 PetriNetUnfolderBase]: For 190/215 co-relation queries the response was YES. [2024-02-05 10:35:17,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 411 events. 189/411 cut-off events. For 190/215 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1989 event pairs, 7 based on Foata normal form. 13/401 useless extension candidates. Maximal degree in co-relation 885. Up to 277 conditions per place. [2024-02-05 10:35:17,375 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 42 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-02-05 10:35:17,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 261 flow [2024-02-05 10:35:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:35:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:35:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-02-05 10:35:17,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-02-05 10:35:17,376 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 108 flow. Second operand 4 states and 104 transitions. [2024-02-05 10:35:17,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 261 flow [2024-02-05 10:35:17,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:35:17,377 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 107 flow [2024-02-05 10:35:17,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-02-05 10:35:17,378 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-02-05 10:35:17,378 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 107 flow [2024-02-05 10:35:17,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 10:35:17,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:17,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:35:17,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:35:17,379 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:17,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1548484703, now seen corresponding path program 1 times [2024-02-05 10:35:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:17,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565429907] [2024-02-05 10:35:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:17,487 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 10:35:17,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:17,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565429907] [2024-02-05 10:35:17,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565429907] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:17,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:17,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:35:17,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140874170] [2024-02-05 10:35:17,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:17,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:35:17,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:17,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:35:17,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:35:17,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-02-05 10:35:17,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 10:35:17,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:17,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-02-05 10:35:17,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:17,590 INFO L124 PetriNetUnfolderBase]: 241/441 cut-off events. [2024-02-05 10:35:17,591 INFO L125 PetriNetUnfolderBase]: For 201/227 co-relation queries the response was YES. [2024-02-05 10:35:17,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 441 events. 241/441 cut-off events. For 201/227 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1776 event pairs, 47 based on Foata normal form. 32/438 useless extension candidates. Maximal degree in co-relation 1057. Up to 178 conditions per place. [2024-02-05 10:35:17,593 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 43 selfloop transitions, 4 changer transitions 3/55 dead transitions. [2024-02-05 10:35:17,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 281 flow [2024-02-05 10:35:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:35:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:35:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-02-05 10:35:17,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-02-05 10:35:17,594 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 107 flow. Second operand 4 states and 98 transitions. [2024-02-05 10:35:17,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 281 flow [2024-02-05 10:35:17,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:35:17,596 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 117 flow [2024-02-05 10:35:17,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2024-02-05 10:35:17,596 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-02-05 10:35:17,596 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 117 flow [2024-02-05 10:35:17,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 10:35:17,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:17,597 INFO L208 CegarLoopForPetriNet]: trace histogram [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 10:35:17,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:35:17,597 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:17,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:17,597 INFO L85 PathProgramCache]: Analyzing trace with hash 56900218, now seen corresponding path program 1 times [2024-02-05 10:35:17,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:17,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154490272] [2024-02-05 10:35:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:17,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:17,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:17,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154490272] [2024-02-05 10:35:17,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154490272] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:17,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:17,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:35:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524403709] [2024-02-05 10:35:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:35:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:17,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:35:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:35:17,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-02-05 10:35:17,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 10:35:17,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:17,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-02-05 10:35:17,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:17,820 INFO L124 PetriNetUnfolderBase]: 242/471 cut-off events. [2024-02-05 10:35:17,820 INFO L125 PetriNetUnfolderBase]: For 329/329 co-relation queries the response was YES. [2024-02-05 10:35:17,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 471 events. 242/471 cut-off events. For 329/329 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1937 event pairs, 47 based on Foata normal form. 14/482 useless extension candidates. Maximal degree in co-relation 1254. Up to 282 conditions per place. [2024-02-05 10:35:17,823 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 46 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-02-05 10:35:17,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 296 flow [2024-02-05 10:35:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:35:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:35:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-02-05 10:35:17,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-02-05 10:35:17,824 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 117 flow. Second operand 4 states and 114 transitions. [2024-02-05 10:35:17,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 296 flow [2024-02-05 10:35:17,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 286 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-05 10:35:17,827 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 155 flow [2024-02-05 10:35:17,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-02-05 10:35:17,829 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-02-05 10:35:17,830 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 155 flow [2024-02-05 10:35:17,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 10:35:17,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:17,830 INFO L208 CegarLoopForPetriNet]: trace histogram [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 10:35:17,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:35:17,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:17,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:17,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1239628862, now seen corresponding path program 2 times [2024-02-05 10:35:17,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:17,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332041144] [2024-02-05 10:35:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:17,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:17,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:17,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332041144] [2024-02-05 10:35:17,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332041144] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:17,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:17,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:35:17,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060297606] [2024-02-05 10:35:17,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:17,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:35:17,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:17,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:35:17,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:35:17,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-02-05 10:35:17,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 10:35:17,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:17,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-02-05 10:35:17,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:18,109 INFO L124 PetriNetUnfolderBase]: 307/584 cut-off events. [2024-02-05 10:35:18,109 INFO L125 PetriNetUnfolderBase]: For 805/805 co-relation queries the response was YES. [2024-02-05 10:35:18,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 584 events. 307/584 cut-off events. For 805/805 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2680 event pairs, 102 based on Foata normal form. 4/585 useless extension candidates. Maximal degree in co-relation 1756. Up to 378 conditions per place. [2024-02-05 10:35:18,113 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 53 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-02-05 10:35:18,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 433 flow [2024-02-05 10:35:18,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:35:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:35:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-02-05 10:35:18,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-02-05 10:35:18,114 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 155 flow. Second operand 5 states and 135 transitions. [2024-02-05 10:35:18,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 433 flow [2024-02-05 10:35:18,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 429 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-05 10:35:18,117 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 254 flow [2024-02-05 10:35:18,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-02-05 10:35:18,117 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-02-05 10:35:18,118 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 254 flow [2024-02-05 10:35:18,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 10:35:18,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:18,118 INFO L208 CegarLoopForPetriNet]: trace histogram [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 10:35:18,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:35:18,118 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:18,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:18,119 INFO L85 PathProgramCache]: Analyzing trace with hash 989635462, now seen corresponding path program 3 times [2024-02-05 10:35:18,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:18,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760178117] [2024-02-05 10:35:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:18,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:18,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:18,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760178117] [2024-02-05 10:35:18,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760178117] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:18,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:18,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:35:18,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784908729] [2024-02-05 10:35:18,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:18,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:35:18,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:18,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:35:18,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:35:18,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-02-05 10:35:18,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 10:35:18,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:18,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-02-05 10:35:18,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:18,327 INFO L124 PetriNetUnfolderBase]: 336/665 cut-off events. [2024-02-05 10:35:18,327 INFO L125 PetriNetUnfolderBase]: For 1360/1360 co-relation queries the response was YES. [2024-02-05 10:35:18,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2160 conditions, 665 events. 336/665 cut-off events. For 1360/1360 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3081 event pairs, 120 based on Foata normal form. 20/682 useless extension candidates. Maximal degree in co-relation 2130. Up to 308 conditions per place. [2024-02-05 10:35:18,331 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 52 selfloop transitions, 13 changer transitions 1/71 dead transitions. [2024-02-05 10:35:18,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 500 flow [2024-02-05 10:35:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:35:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:35:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-02-05 10:35:18,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-02-05 10:35:18,332 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 254 flow. Second operand 4 states and 117 transitions. [2024-02-05 10:35:18,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 500 flow [2024-02-05 10:35:18,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 500 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:35:18,336 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 314 flow [2024-02-05 10:35:18,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-02-05 10:35:18,336 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-02-05 10:35:18,336 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 314 flow [2024-02-05 10:35:18,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 10:35:18,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:18,337 INFO L208 CegarLoopForPetriNet]: trace histogram [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 10:35:18,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-05 10:35:18,337 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:18,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash 905904528, now seen corresponding path program 4 times [2024-02-05 10:35:18,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:18,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883440162] [2024-02-05 10:35:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:18,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:18,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:18,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883440162] [2024-02-05 10:35:18,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883440162] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:35:18,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:35:18,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:35:18,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425423585] [2024-02-05 10:35:18,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:35:18,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:35:18,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:18,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:35:18,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:35:18,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-02-05 10:35:18,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 10:35:18,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:18,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-02-05 10:35:18,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:18,568 INFO L124 PetriNetUnfolderBase]: 326/635 cut-off events. [2024-02-05 10:35:18,569 INFO L125 PetriNetUnfolderBase]: For 1868/1868 co-relation queries the response was YES. [2024-02-05 10:35:18,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2313 conditions, 635 events. 326/635 cut-off events. For 1868/1868 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2810 event pairs, 136 based on Foata normal form. 8/640 useless extension candidates. Maximal degree in co-relation 2280. Up to 286 conditions per place. [2024-02-05 10:35:18,573 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 44 selfloop transitions, 10 changer transitions 6/65 dead transitions. [2024-02-05 10:35:18,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 501 flow [2024-02-05 10:35:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:35:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:35:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-02-05 10:35:18,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-02-05 10:35:18,574 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 314 flow. Second operand 5 states and 130 transitions. [2024-02-05 10:35:18,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 501 flow [2024-02-05 10:35:18,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 473 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-02-05 10:35:18,578 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 303 flow [2024-02-05 10:35:18,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2024-02-05 10:35:18,579 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-02-05 10:35:18,579 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 303 flow [2024-02-05 10:35:18,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 10:35:18,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:18,580 INFO L208 CegarLoopForPetriNet]: trace histogram [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 10:35:18,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:35:18,580 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:18,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:18,581 INFO L85 PathProgramCache]: Analyzing trace with hash -856180958, now seen corresponding path program 1 times [2024-02-05 10:35:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:18,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979773143] [2024-02-05 10:35:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:18,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979773143] [2024-02-05 10:35:18,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979773143] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728799299] [2024-02-05 10:35:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:18,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:18,700 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 10:35:18,721 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 10:35:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:18,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:35:18,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:35:18,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:35:18,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728799299] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:18,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:18,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2024-02-05 10:35:18,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680604677] [2024-02-05 10:35:18,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:18,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-05 10:35:18,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:18,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-05 10:35:18,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-05 10:35:18,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-02-05 10:35:18,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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 10:35:18,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:18,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-02-05 10:35:18,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:19,066 INFO L124 PetriNetUnfolderBase]: 415/890 cut-off events. [2024-02-05 10:35:19,066 INFO L125 PetriNetUnfolderBase]: For 2261/2270 co-relation queries the response was YES. [2024-02-05 10:35:19,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 890 events. 415/890 cut-off events. For 2261/2270 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4664 event pairs, 83 based on Foata normal form. 17/897 useless extension candidates. Maximal degree in co-relation 2992. Up to 306 conditions per place. [2024-02-05 10:35:19,071 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 58 selfloop transitions, 6 changer transitions 5/83 dead transitions. [2024-02-05 10:35:19,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 645 flow [2024-02-05 10:35:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:35:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:35:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-02-05 10:35:19,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-02-05 10:35:19,072 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 303 flow. Second operand 5 states and 140 transitions. [2024-02-05 10:35:19,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 645 flow [2024-02-05 10:35:19,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 605 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-02-05 10:35:19,077 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 315 flow [2024-02-05 10:35:19,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2024-02-05 10:35:19,077 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-02-05 10:35:19,077 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 315 flow [2024-02-05 10:35:19,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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 10:35:19,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:19,078 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:35:19,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-05 10:35:19,289 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,SelfDestructingSolverStorable11 [2024-02-05 10:35:19,290 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:19,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:19,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2054179600, now seen corresponding path program 2 times [2024-02-05 10:35:19,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:19,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022877174] [2024-02-05 10:35:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:19,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:19,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:19,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022877174] [2024-02-05 10:35:19,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022877174] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:19,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616198730] [2024-02-05 10:35:19,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:35:19,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:19,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:19,674 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 10:35:19,698 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 10:35:19,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:35:19,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:19,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:35:19,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:19,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:19,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616198730] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:19,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:19,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-02-05 10:35:19,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106786319] [2024-02-05 10:35:19,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:19,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-05 10:35:19,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:19,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-05 10:35:19,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-02-05 10:35:20,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:35:20,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 315 flow. Second operand has 17 states, 17 states have (on average 18.705882352941178) internal successors, (318), 17 states have internal predecessors, (318), 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 10:35:20,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:20,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:35:20,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:20,999 INFO L124 PetriNetUnfolderBase]: 1852/3080 cut-off events. [2024-02-05 10:35:21,000 INFO L125 PetriNetUnfolderBase]: For 6668/6668 co-relation queries the response was YES. [2024-02-05 10:35:21,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10856 conditions, 3080 events. 1852/3080 cut-off events. For 6668/6668 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 15833 event pairs, 228 based on Foata normal form. 28/3104 useless extension candidates. Maximal degree in co-relation 10820. Up to 872 conditions per place. [2024-02-05 10:35:21,021 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 139 selfloop transitions, 56 changer transitions 5/203 dead transitions. [2024-02-05 10:35:21,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 203 transitions, 1622 flow [2024-02-05 10:35:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-05 10:35:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-05 10:35:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 393 transitions. [2024-02-05 10:35:21,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51171875 [2024-02-05 10:35:21,023 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 315 flow. Second operand 16 states and 393 transitions. [2024-02-05 10:35:21,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 203 transitions, 1622 flow [2024-02-05 10:35:21,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 203 transitions, 1590 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-02-05 10:35:21,033 INFO L231 Difference]: Finished difference. Result has 85 places, 95 transitions, 888 flow [2024-02-05 10:35:21,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=888, PETRI_PLACES=85, PETRI_TRANSITIONS=95} [2024-02-05 10:35:21,034 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-02-05 10:35:21,034 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 95 transitions, 888 flow [2024-02-05 10:35:21,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.705882352941178) internal successors, (318), 17 states have internal predecessors, (318), 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 10:35:21,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:21,035 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:35:21,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-05 10:35:21,251 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,SelfDestructingSolverStorable12 [2024-02-05 10:35:21,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:21,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:21,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1814257944, now seen corresponding path program 3 times [2024-02-05 10:35:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:21,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785093217] [2024-02-05 10:35:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:21,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:21,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:21,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785093217] [2024-02-05 10:35:21,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785093217] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:21,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745406483] [2024-02-05 10:35:21,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:35:21,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:21,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:21,465 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 10:35:21,484 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 10:35:21,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-05 10:35:21,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:21,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:35:21,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:21,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:21,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745406483] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:21,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:21,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-05 10:35:21,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648349605] [2024-02-05 10:35:21,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:21,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:35:21,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:35:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:35:21,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:35:21,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 95 transitions, 888 flow. Second operand has 14 states, 14 states have (on average 18.428571428571427) internal successors, (258), 14 states have internal predecessors, (258), 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 10:35:21,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:21,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:35:21,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:22,400 INFO L124 PetriNetUnfolderBase]: 2073/3455 cut-off events. [2024-02-05 10:35:22,400 INFO L125 PetriNetUnfolderBase]: For 16441/16441 co-relation queries the response was YES. [2024-02-05 10:35:22,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14550 conditions, 3455 events. 2073/3455 cut-off events. For 16441/16441 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18431 event pairs, 306 based on Foata normal form. 16/3467 useless extension candidates. Maximal degree in co-relation 14502. Up to 1288 conditions per place. [2024-02-05 10:35:22,427 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 137 selfloop transitions, 47 changer transitions 13/200 dead transitions. [2024-02-05 10:35:22,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 200 transitions, 1985 flow [2024-02-05 10:35:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-05 10:35:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-05 10:35:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 328 transitions. [2024-02-05 10:35:22,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-02-05 10:35:22,429 INFO L175 Difference]: Start difference. First operand has 85 places, 95 transitions, 888 flow. Second operand 14 states and 328 transitions. [2024-02-05 10:35:22,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 200 transitions, 1985 flow [2024-02-05 10:35:22,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 200 transitions, 1872 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-02-05 10:35:22,454 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 1158 flow [2024-02-05 10:35:22,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1158, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-02-05 10:35:22,455 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2024-02-05 10:35:22,455 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 1158 flow [2024-02-05 10:35:22,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.428571428571427) internal successors, (258), 14 states have internal predecessors, (258), 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 10:35:22,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:22,455 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:35:22,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-05 10:35:22,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:22,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:22,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:22,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1094758972, now seen corresponding path program 4 times [2024-02-05 10:35:22,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:22,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246540804] [2024-02-05 10:35:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:22,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:22,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:22,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246540804] [2024-02-05 10:35:22,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246540804] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:22,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976900299] [2024-02-05 10:35:22,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:35:22,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:22,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:22,828 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 10:35:22,852 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 10:35:22,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:35:22,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:22,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:35:22,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:22,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:23,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976900299] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:23,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:23,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-05 10:35:23,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895064976] [2024-02-05 10:35:23,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:23,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:35:23,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:35:23,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:35:23,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:35:23,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 1158 flow. Second operand has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 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 10:35:23,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:23,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:35:23,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:25,419 INFO L124 PetriNetUnfolderBase]: 3370/5567 cut-off events. [2024-02-05 10:35:25,419 INFO L125 PetriNetUnfolderBase]: For 30766/30766 co-relation queries the response was YES. [2024-02-05 10:35:25,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24634 conditions, 5567 events. 3370/5567 cut-off events. For 30766/30766 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 30638 event pairs, 268 based on Foata normal form. 200/5764 useless extension candidates. Maximal degree in co-relation 24576. Up to 1007 conditions per place. [2024-02-05 10:35:25,468 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 275 selfloop transitions, 185 changer transitions 2/465 dead transitions. [2024-02-05 10:35:25,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 465 transitions, 4735 flow [2024-02-05 10:35:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-02-05 10:35:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-02-05 10:35:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 912 transitions. [2024-02-05 10:35:25,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-02-05 10:35:25,472 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 1158 flow. Second operand 39 states and 912 transitions. [2024-02-05 10:35:25,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 465 transitions, 4735 flow [2024-02-05 10:35:25,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 465 transitions, 4685 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-02-05 10:35:25,537 INFO L231 Difference]: Finished difference. Result has 164 places, 250 transitions, 3557 flow [2024-02-05 10:35:25,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3557, PETRI_PLACES=164, PETRI_TRANSITIONS=250} [2024-02-05 10:35:25,538 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 114 predicate places. [2024-02-05 10:35:25,538 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 250 transitions, 3557 flow [2024-02-05 10:35:25,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 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 10:35:25,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:25,538 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:35:25,558 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 10:35:25,752 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,SelfDestructingSolverStorable14 [2024-02-05 10:35:25,752 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:25,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1252901836, now seen corresponding path program 5 times [2024-02-05 10:35:25,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:25,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084402337] [2024-02-05 10:35:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:25,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:25,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:25,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084402337] [2024-02-05 10:35:25,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084402337] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:25,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241754689] [2024-02-05 10:35:25,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:35:25,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:25,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:25,933 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 10:35:25,934 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 10:35:25,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-05 10:35:25,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:25,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:35:26,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:26,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:26,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241754689] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:26,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:26,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-02-05 10:35:26,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604169044] [2024-02-05 10:35:26,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:26,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:35:26,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:26,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:35:26,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:35:26,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:35:26,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 250 transitions, 3557 flow. Second operand has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 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 10:35:26,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:26,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:35:26,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:33,134 INFO L124 PetriNetUnfolderBase]: 4243/6988 cut-off events. [2024-02-05 10:35:33,134 INFO L125 PetriNetUnfolderBase]: For 65995/65995 co-relation queries the response was YES. [2024-02-05 10:35:33,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37198 conditions, 6988 events. 4243/6988 cut-off events. For 65995/65995 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 40107 event pairs, 275 based on Foata normal form. 90/7075 useless extension candidates. Maximal degree in co-relation 37114. Up to 1268 conditions per place. [2024-02-05 10:35:33,205 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 225 selfloop transitions, 283 changer transitions 5/516 dead transitions. [2024-02-05 10:35:33,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 516 transitions, 7321 flow [2024-02-05 10:35:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-05 10:35:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-05 10:35:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 622 transitions. [2024-02-05 10:35:33,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799382716049383 [2024-02-05 10:35:33,208 INFO L175 Difference]: Start difference. First operand has 164 places, 250 transitions, 3557 flow. Second operand 27 states and 622 transitions. [2024-02-05 10:35:33,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 516 transitions, 7321 flow [2024-02-05 10:35:33,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 516 transitions, 6851 flow, removed 225 selfloop flow, removed 3 redundant places. [2024-02-05 10:35:33,429 INFO L231 Difference]: Finished difference. Result has 195 places, 372 transitions, 5998 flow [2024-02-05 10:35:33,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5998, PETRI_PLACES=195, PETRI_TRANSITIONS=372} [2024-02-05 10:35:33,430 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 145 predicate places. [2024-02-05 10:35:33,430 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 372 transitions, 5998 flow [2024-02-05 10:35:33,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 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 10:35:33,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:33,430 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:35:33,455 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 10:35:33,641 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,SelfDestructingSolverStorable15 [2024-02-05 10:35:33,642 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:33,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1857857990, now seen corresponding path program 6 times [2024-02-05 10:35:33,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:33,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443069979] [2024-02-05 10:35:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:33,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:33,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:33,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443069979] [2024-02-05 10:35:33,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443069979] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:33,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389833848] [2024-02-05 10:35:33,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:35:33,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:33,772 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 10:35:33,868 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 10:35:33,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-05 10:35:33,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:33,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:35:33,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:33,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:34,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389833848] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:34,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:34,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-05 10:35:34,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542519564] [2024-02-05 10:35:34,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:34,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-05 10:35:34,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:34,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-05 10:35:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-02-05 10:35:34,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:35:34,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 372 transitions, 5998 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 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 10:35:34,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:34,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:35:34,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:39,810 INFO L124 PetriNetUnfolderBase]: 4217/6958 cut-off events. [2024-02-05 10:35:39,810 INFO L125 PetriNetUnfolderBase]: For 73951/73951 co-relation queries the response was YES. [2024-02-05 10:35:39,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39208 conditions, 6958 events. 4217/6958 cut-off events. For 73951/73951 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 40223 event pairs, 702 based on Foata normal form. 16/6971 useless extension candidates. Maximal degree in co-relation 39118. Up to 2064 conditions per place. [2024-02-05 10:35:39,894 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 228 selfloop transitions, 219 changer transitions 3/453 dead transitions. [2024-02-05 10:35:39,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 453 transitions, 7367 flow [2024-02-05 10:35:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-05 10:35:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-05 10:35:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 361 transitions. [2024-02-05 10:35:39,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013888888888889 [2024-02-05 10:35:39,896 INFO L175 Difference]: Start difference. First operand has 195 places, 372 transitions, 5998 flow. Second operand 15 states and 361 transitions. [2024-02-05 10:35:39,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 453 transitions, 7367 flow [2024-02-05 10:35:40,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 453 transitions, 7055 flow, removed 120 selfloop flow, removed 10 redundant places. [2024-02-05 10:35:40,418 INFO L231 Difference]: Finished difference. Result has 201 places, 374 transitions, 6154 flow [2024-02-05 10:35:40,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5686, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6154, PETRI_PLACES=201, PETRI_TRANSITIONS=374} [2024-02-05 10:35:40,419 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 151 predicate places. [2024-02-05 10:35:40,419 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 374 transitions, 6154 flow [2024-02-05 10:35:40,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 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 10:35:40,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:40,419 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:35:40,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-05 10:35:40,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-05 10:35:40,620 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:40,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:40,641 INFO L85 PathProgramCache]: Analyzing trace with hash -699246606, now seen corresponding path program 7 times [2024-02-05 10:35:40,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:40,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640419543] [2024-02-05 10:35:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:40,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:40,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:40,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640419543] [2024-02-05 10:35:40,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640419543] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:40,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061558679] [2024-02-05 10:35:40,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:35:40,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:40,806 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 10:35:40,810 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 10:35:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:40,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:35:40,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:40,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:41,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061558679] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:41,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:41,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-05 10:35:41,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576112622] [2024-02-05 10:35:41,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:41,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:35:41,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:41,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:35:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:35:41,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:35:41,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 374 transitions, 6154 flow. Second operand has 14 states, 14 states have (on average 18.285714285714285) internal successors, (256), 14 states have internal predecessors, (256), 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 10:35:41,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:41,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:35:41,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:43,891 INFO L124 PetriNetUnfolderBase]: 4911/8098 cut-off events. [2024-02-05 10:35:43,891 INFO L125 PetriNetUnfolderBase]: For 79841/79841 co-relation queries the response was YES. [2024-02-05 10:35:43,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45194 conditions, 8098 events. 4911/8098 cut-off events. For 79841/79841 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 47601 event pairs, 367 based on Foata normal form. 74/8169 useless extension candidates. Maximal degree in co-relation 45100. Up to 1470 conditions per place. [2024-02-05 10:35:43,970 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 238 selfloop transitions, 376 changer transitions 5/622 dead transitions. [2024-02-05 10:35:43,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 622 transitions, 9842 flow [2024-02-05 10:35:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-05 10:35:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-05 10:35:43,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 724 transitions. [2024-02-05 10:35:43,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48655913978494625 [2024-02-05 10:35:43,973 INFO L175 Difference]: Start difference. First operand has 201 places, 374 transitions, 6154 flow. Second operand 31 states and 724 transitions. [2024-02-05 10:35:43,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 622 transitions, 9842 flow [2024-02-05 10:35:44,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 622 transitions, 9412 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-02-05 10:35:44,364 INFO L231 Difference]: Finished difference. Result has 224 places, 465 transitions, 8341 flow [2024-02-05 10:35:44,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5731, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=8341, PETRI_PLACES=224, PETRI_TRANSITIONS=465} [2024-02-05 10:35:44,365 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 174 predicate places. [2024-02-05 10:35:44,365 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 465 transitions, 8341 flow [2024-02-05 10:35:44,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.285714285714285) internal successors, (256), 14 states have internal predecessors, (256), 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 10:35:44,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:44,366 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:35:44,383 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 10:35:44,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:44,566 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:44,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:44,567 INFO L85 PathProgramCache]: Analyzing trace with hash -73545874, now seen corresponding path program 8 times [2024-02-05 10:35:44,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:44,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140160032] [2024-02-05 10:35:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:44,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:44,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:44,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140160032] [2024-02-05 10:35:44,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140160032] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:44,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306030702] [2024-02-05 10:35:44,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:35:44,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:44,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:44,709 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 10:35:44,713 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 10:35:44,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:35:44,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:44,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:35:44,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:44,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:44,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306030702] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:44,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:44,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-02-05 10:35:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270275345] [2024-02-05 10:35:44,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:44,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:35:44,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:44,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:35:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:35:45,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:35:45,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 465 transitions, 8341 flow. Second operand has 14 states, 14 states have (on average 19.285714285714285) internal successors, (270), 14 states have internal predecessors, (270), 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 10:35:45,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:45,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:35:45,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:47,646 INFO L124 PetriNetUnfolderBase]: 6290/10300 cut-off events. [2024-02-05 10:35:47,646 INFO L125 PetriNetUnfolderBase]: For 116611/116611 co-relation queries the response was YES. [2024-02-05 10:35:47,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61879 conditions, 10300 events. 6290/10300 cut-off events. For 116611/116611 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 62267 event pairs, 197 based on Foata normal form. 62/10360 useless extension candidates. Maximal degree in co-relation 61780. Up to 2910 conditions per place. [2024-02-05 10:35:47,736 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 239 selfloop transitions, 576 changer transitions 2/820 dead transitions. [2024-02-05 10:35:47,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 820 transitions, 15060 flow [2024-02-05 10:35:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-05 10:35:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-05 10:35:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 534 transitions. [2024-02-05 10:35:47,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483695652173913 [2024-02-05 10:35:47,738 INFO L175 Difference]: Start difference. First operand has 224 places, 465 transitions, 8341 flow. Second operand 23 states and 534 transitions. [2024-02-05 10:35:47,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 820 transitions, 15060 flow [2024-02-05 10:35:48,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 820 transitions, 13918 flow, removed 147 selfloop flow, removed 18 redundant places. [2024-02-05 10:35:48,730 INFO L231 Difference]: Finished difference. Result has 237 places, 690 transitions, 13536 flow [2024-02-05 10:35:48,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7515, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=13536, PETRI_PLACES=237, PETRI_TRANSITIONS=690} [2024-02-05 10:35:48,731 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 187 predicate places. [2024-02-05 10:35:48,731 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 690 transitions, 13536 flow [2024-02-05 10:35:48,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.285714285714285) internal successors, (270), 14 states have internal predecessors, (270), 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 10:35:48,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:48,731 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:35:48,742 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 10:35:48,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:48,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:48,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash 661784802, now seen corresponding path program 9 times [2024-02-05 10:35:48,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:48,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385832350] [2024-02-05 10:35:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:48,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:49,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:49,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385832350] [2024-02-05 10:35:49,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385832350] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:49,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372553075] [2024-02-05 10:35:49,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:35:49,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:49,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:49,053 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 10:35:49,077 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 10:35:49,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-05 10:35:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:49,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:35:49,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:49,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:49,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372553075] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:49,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:49,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-05 10:35:49,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038702404] [2024-02-05 10:35:49,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:49,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-05 10:35:49,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-05 10:35:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-02-05 10:35:49,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:35:49,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 690 transitions, 13536 flow. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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 10:35:49,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:49,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:35:49,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:52,660 INFO L124 PetriNetUnfolderBase]: 8138/13197 cut-off events. [2024-02-05 10:35:52,660 INFO L125 PetriNetUnfolderBase]: For 182181/182181 co-relation queries the response was YES. [2024-02-05 10:35:52,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84847 conditions, 13197 events. 8138/13197 cut-off events. For 182181/182181 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 82129 event pairs, 938 based on Foata normal form. 24/13218 useless extension candidates. Maximal degree in co-relation 84744. Up to 2522 conditions per place. [2024-02-05 10:35:52,805 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 414 selfloop transitions, 628 changer transitions 8/1053 dead transitions. [2024-02-05 10:35:52,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1053 transitions, 21371 flow [2024-02-05 10:35:52,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-05 10:35:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-05 10:35:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 514 transitions. [2024-02-05 10:35:52,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099206349206349 [2024-02-05 10:35:52,807 INFO L175 Difference]: Start difference. First operand has 237 places, 690 transitions, 13536 flow. Second operand 21 states and 514 transitions. [2024-02-05 10:35:52,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1053 transitions, 21371 flow [2024-02-05 10:35:54,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1053 transitions, 20628 flow, removed 198 selfloop flow, removed 3 redundant places. [2024-02-05 10:35:54,944 INFO L231 Difference]: Finished difference. Result has 257 places, 864 transitions, 18064 flow [2024-02-05 10:35:54,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=13034, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=18064, PETRI_PLACES=257, PETRI_TRANSITIONS=864} [2024-02-05 10:35:54,945 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 207 predicate places. [2024-02-05 10:35:54,946 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 864 transitions, 18064 flow [2024-02-05 10:35:54,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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 10:35:54,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:54,946 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:35:54,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-05 10:35:55,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:55,147 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:35:55,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:55,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1651781766, now seen corresponding path program 10 times [2024-02-05 10:35:55,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:55,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135227203] [2024-02-05 10:35:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:55,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:55,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:55,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135227203] [2024-02-05 10:35:55,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135227203] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:55,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312004952] [2024-02-05 10:35:55,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:35:55,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:55,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:55,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:35:55,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-05 10:35:55,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:35:55,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:55,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:35:55,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:55,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:55,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312004952] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:55,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:55,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-05 10:35:55,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372577833] [2024-02-05 10:35:55,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:55,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:35:55,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:35:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:35:55,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:35:55,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 864 transitions, 18064 flow. Second operand has 14 states, 14 states have (on average 18.785714285714285) internal successors, (263), 14 states have internal predecessors, (263), 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 10:35:55,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:55,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:35:55,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:01,273 INFO L124 PetriNetUnfolderBase]: 10006/16237 cut-off events. [2024-02-05 10:36:01,273 INFO L125 PetriNetUnfolderBase]: For 223212/223212 co-relation queries the response was YES. [2024-02-05 10:36:01,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107276 conditions, 16237 events. 10006/16237 cut-off events. For 223212/223212 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 104386 event pairs, 627 based on Foata normal form. 104/16338 useless extension candidates. Maximal degree in co-relation 107170. Up to 4911 conditions per place. [2024-02-05 10:36:01,506 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 374 selfloop transitions, 953 changer transitions 3/1333 dead transitions. [2024-02-05 10:36:01,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1333 transitions, 27547 flow [2024-02-05 10:36:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-02-05 10:36:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-02-05 10:36:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 937 transitions. [2024-02-05 10:36:01,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4761178861788618 [2024-02-05 10:36:01,509 INFO L175 Difference]: Start difference. First operand has 257 places, 864 transitions, 18064 flow. Second operand 41 states and 937 transitions. [2024-02-05 10:36:01,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1333 transitions, 27547 flow [2024-02-05 10:36:04,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1333 transitions, 27277 flow, removed 124 selfloop flow, removed 4 redundant places. [2024-02-05 10:36:04,196 INFO L231 Difference]: Finished difference. Result has 304 places, 1112 transitions, 26359 flow [2024-02-05 10:36:04,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=17785, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=706, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=26359, PETRI_PLACES=304, PETRI_TRANSITIONS=1112} [2024-02-05 10:36:04,198 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 254 predicate places. [2024-02-05 10:36:04,198 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1112 transitions, 26359 flow [2024-02-05 10:36:04,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.785714285714285) internal successors, (263), 14 states have internal predecessors, (263), 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 10:36:04,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:04,198 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:36:04,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:04,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-02-05 10:36:04,399 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:36:04,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash -490177214, now seen corresponding path program 11 times [2024-02-05 10:36:04,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:04,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383466083] [2024-02-05 10:36:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:04,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:04,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:04,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383466083] [2024-02-05 10:36:04,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383466083] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:04,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448886514] [2024-02-05 10:36:04,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:36:04,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:04,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:04,560 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:04,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-05 10:36:04,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:36:04,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:04,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-05 10:36:04,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:04,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:04,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448886514] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:04,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:04,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-02-05 10:36:04,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275613956] [2024-02-05 10:36:04,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:04,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-05 10:36:04,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:04,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-05 10:36:04,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-02-05 10:36:05,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:36:05,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1112 transitions, 26359 flow. Second operand has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 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 10:36:05,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:05,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:36:05,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:12,541 INFO L124 PetriNetUnfolderBase]: 12392/20222 cut-off events. [2024-02-05 10:36:12,541 INFO L125 PetriNetUnfolderBase]: For 360008/360008 co-relation queries the response was YES. [2024-02-05 10:36:12,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143978 conditions, 20222 events. 12392/20222 cut-off events. For 360008/360008 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 133163 event pairs, 678 based on Foata normal form. 142/20361 useless extension candidates. Maximal degree in co-relation 143862. Up to 3688 conditions per place. [2024-02-05 10:36:12,906 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 436 selfloop transitions, 1202 changer transitions 8/1649 dead transitions. [2024-02-05 10:36:12,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1649 transitions, 38832 flow [2024-02-05 10:36:12,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-02-05 10:36:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-02-05 10:36:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 974 transitions. [2024-02-05 10:36:12,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46117424242424243 [2024-02-05 10:36:12,908 INFO L175 Difference]: Start difference. First operand has 304 places, 1112 transitions, 26359 flow. Second operand 44 states and 974 transitions. [2024-02-05 10:36:12,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1649 transitions, 38832 flow [2024-02-05 10:36:18,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1649 transitions, 37576 flow, removed 120 selfloop flow, removed 9 redundant places. [2024-02-05 10:36:18,492 INFO L231 Difference]: Finished difference. Result has 351 places, 1392 transitions, 36374 flow [2024-02-05 10:36:18,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=25274, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=36374, PETRI_PLACES=351, PETRI_TRANSITIONS=1392} [2024-02-05 10:36:18,493 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 301 predicate places. [2024-02-05 10:36:18,493 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1392 transitions, 36374 flow [2024-02-05 10:36:18,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 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 10:36:18,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:18,493 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:36:18,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:18,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-02-05 10:36:18,694 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:36:18,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:18,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2120492726, now seen corresponding path program 12 times [2024-02-05 10:36:18,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:18,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37189435] [2024-02-05 10:36:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:18,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:18,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:18,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37189435] [2024-02-05 10:36:18,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37189435] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:18,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910948264] [2024-02-05 10:36:18,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:36:18,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:18,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:18,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:18,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-05 10:36:18,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-05 10:36:18,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:18,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:36:18,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:18,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:19,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910948264] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:19,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:19,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-02-05 10:36:19,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979369719] [2024-02-05 10:36:19,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:19,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-05 10:36:19,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:19,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-05 10:36:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-02-05 10:36:19,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:36:19,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1392 transitions, 36374 flow. Second operand has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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 10:36:19,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:19,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:36:19,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:26,115 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 10:36:33,056 INFO L124 PetriNetUnfolderBase]: 16232/26540 cut-off events. [2024-02-05 10:36:33,057 INFO L125 PetriNetUnfolderBase]: For 537355/537355 co-relation queries the response was YES. [2024-02-05 10:36:33,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201298 conditions, 26540 events. 16232/26540 cut-off events. For 537355/537355 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 183158 event pairs, 2291 based on Foata normal form. 154/26691 useless extension candidates. Maximal degree in co-relation 201170. Up to 11982 conditions per place. [2024-02-05 10:36:33,455 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 1235 selfloop transitions, 885 changer transitions 1/2124 dead transitions. [2024-02-05 10:36:33,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 2124 transitions, 55953 flow [2024-02-05 10:36:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-05 10:36:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-05 10:36:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 794 transitions. [2024-02-05 10:36:33,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48651960784313725 [2024-02-05 10:36:33,457 INFO L175 Difference]: Start difference. First operand has 351 places, 1392 transitions, 36374 flow. Second operand 34 states and 794 transitions. [2024-02-05 10:36:33,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 2124 transitions, 55953 flow [2024-02-05 10:36:48,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 2124 transitions, 53150 flow, removed 213 selfloop flow, removed 15 redundant places. [2024-02-05 10:36:48,578 INFO L231 Difference]: Finished difference. Result has 393 places, 1785 transitions, 47835 flow [2024-02-05 10:36:48,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=34346, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=47835, PETRI_PLACES=393, PETRI_TRANSITIONS=1785} [2024-02-05 10:36:48,579 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 343 predicate places. [2024-02-05 10:36:48,580 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1785 transitions, 47835 flow [2024-02-05 10:36:48,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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 10:36:48,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:48,580 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:36:48,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:48,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-02-05 10:36:48,792 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:36:48,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:48,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1780174638, now seen corresponding path program 13 times [2024-02-05 10:36:48,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:48,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860834689] [2024-02-05 10:36:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:48,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:48,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:48,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860834689] [2024-02-05 10:36:48,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860834689] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:48,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819405545] [2024-02-05 10:36:48,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:36:48,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:48,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:48,906 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:48,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-05 10:36:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:48,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:36:48,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:49,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:49,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819405545] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:49,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:49,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-02-05 10:36:49,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280051865] [2024-02-05 10:36:49,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:49,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:36:49,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:49,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:36:49,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:36:49,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:36:49,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1785 transitions, 47835 flow. Second operand has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:49,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:49,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:36:49,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:00,748 INFO L124 PetriNetUnfolderBase]: 16372/26788 cut-off events. [2024-02-05 10:37:00,748 INFO L125 PetriNetUnfolderBase]: For 647536/647536 co-relation queries the response was YES. [2024-02-05 10:37:01,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218589 conditions, 26788 events. 16372/26788 cut-off events. For 647536/647536 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 186489 event pairs, 7504 based on Foata normal form. 12/26797 useless extension candidates. Maximal degree in co-relation 218444. Up to 22883 conditions per place. [2024-02-05 10:37:01,704 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 1617 selfloop transitions, 242 changer transitions 7/1869 dead transitions. [2024-02-05 10:37:01,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1869 transitions, 52718 flow [2024-02-05 10:37:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-05 10:37:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-05 10:37:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 295 transitions. [2024-02-05 10:37:01,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47275641025641024 [2024-02-05 10:37:01,705 INFO L175 Difference]: Start difference. First operand has 393 places, 1785 transitions, 47835 flow. Second operand 13 states and 295 transitions. [2024-02-05 10:37:01,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1869 transitions, 52718 flow [2024-02-05 10:37:21,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1869 transitions, 52213 flow, removed 126 selfloop flow, removed 4 redundant places. [2024-02-05 10:37:21,823 INFO L231 Difference]: Finished difference. Result has 408 places, 1806 transitions, 48719 flow [2024-02-05 10:37:21,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=47334, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=48719, PETRI_PLACES=408, PETRI_TRANSITIONS=1806} [2024-02-05 10:37:21,824 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 358 predicate places. [2024-02-05 10:37:21,825 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1806 transitions, 48719 flow [2024-02-05 10:37:21,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:21,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:21,825 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-05 10:37:21,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-05 10:37:22,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-02-05 10:37:22,036 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-02-05 10:37:22,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 159300588, now seen corresponding path program 14 times [2024-02-05 10:37:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:22,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679542706] [2024-02-05 10:37:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:22,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:22,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679542706] [2024-02-05 10:37:22,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679542706] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816657122] [2024-02-05 10:37:22,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:37:22,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:22,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:22,182 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:22,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-05 10:37:22,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:37:22,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:22,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:37:22,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:22,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:22,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816657122] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:22,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:22,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-02-05 10:37:22,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884938531] [2024-02-05 10:37:22,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:22,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-05 10:37:22,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:22,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-05 10:37:22,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-02-05 10:37:22,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-02-05 10:37:22,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1806 transitions, 48719 flow. Second operand has 16 states, 16 states have (on average 18.5) internal successors, (296), 16 states have internal predecessors, (296), 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 10:37:22,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:22,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-02-05 10:37:22,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:32,970 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 10:37:46,403 INFO L124 PetriNetUnfolderBase]: 22942/37296 cut-off events. [2024-02-05 10:37:46,403 INFO L125 PetriNetUnfolderBase]: For 930704/930704 co-relation queries the response was YES. [2024-02-05 10:37:47,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310859 conditions, 37296 events. 22942/37296 cut-off events. For 930704/930704 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 267231 event pairs, 2336 based on Foata normal form. 116/37409 useless extension candidates. Maximal degree in co-relation 310706. Up to 12414 conditions per place. [2024-02-05 10:37:47,665 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 1028 selfloop transitions, 1784 changer transitions 5/2820 dead transitions. [2024-02-05 10:37:47,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2820 transitions, 78856 flow [2024-02-05 10:37:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-02-05 10:37:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-02-05 10:37:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 839 transitions. [2024-02-05 10:37:47,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855324074074074 [2024-02-05 10:37:47,668 INFO L175 Difference]: Start difference. First operand has 408 places, 1806 transitions, 48719 flow. Second operand 36 states and 839 transitions. [2024-02-05 10:37:47,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2820 transitions, 78856 flow