./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 59af5db6 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/test-easy1.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy1.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-59af5db-m [2024-02-02 09:22:03,104 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 09:22:03,149 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 09:22:03,152 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 09:22:03,153 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 09:22:03,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 09:22:03,166 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 09:22:03,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 09:22:03,166 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 09:22:03,166 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 09:22:03,167 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 09:22:03,167 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 09:22:03,167 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 09:22:03,167 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 09:22:03,168 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 09:22:03,168 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 09:22:03,168 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 09:22:03,168 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 09:22:03,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 09:22:03,169 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 09:22:03,169 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 09:22:03,170 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 09:22:03,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 09:22:03,170 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 09:22:03,170 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 09:22:03,170 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 09:22:03,171 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 09:22:03,171 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 09:22:03,171 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 09:22:03,171 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 09:22:03,172 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 09:22:03,172 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 09:22:03,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:22:03,172 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 09:22:03,173 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 09:22:03,173 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 09:22:03,173 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 09:22:03,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 09:22:03,173 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 09:22:03,173 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 09:22:03,174 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 09:22:03,174 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 09:22:03,174 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 09:22:03,174 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 09:22:03,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 09:22:03,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 09:22:03,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 09:22:03,346 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 09:22:03,347 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 09:22:03,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml [2024-02-02 09:22:03,399 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 09:22:03,399 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 09:22:03,399 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-02-02 09:22:04,576 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 09:22:04,737 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 09:22:04,737 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-02-02 09:22:04,743 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7942146b4/4b94d99997a3493ba09bc565a02e4f3b/FLAGcc0b362bd [2024-02-02 09:22:04,759 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7942146b4/4b94d99997a3493ba09bc565a02e4f3b [2024-02-02 09:22:04,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 09:22:04,761 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 09:22:04,765 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 09:22:04,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 09:22:04,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 09:22:04,770 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:22:03" (1/2) ... [2024-02-02 09:22:04,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d351394 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:04, skipping insertion in model container [2024-02-02 09:22:04,772 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:22:03" (1/2) ... [2024-02-02 09:22:04,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@632560ae and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:04, skipping insertion in model container [2024-02-02 09:22:04,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:22:04" (2/2) ... [2024-02-02 09:22:04,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d351394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:04, skipping insertion in model container [2024-02-02 09:22:04,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:22:04" (2/2) ... [2024-02-02 09:22:04,774 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 09:22:04,787 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 09:22:04,788 INFO L101 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-02-02 09:22:04,789 INFO L101 nessWitnessExtractor]: Loop invariant at [L49-L51] (unsigned long )_argptr == 0UL [2024-02-02 09:22:04,789 INFO L101 nessWitnessExtractor]: Location invariant before [L59-L59] ((((((0LL - (long long )x1) + (long long )x2 >= 0LL) && ((long long )x1 + (long long )x2 >= 0LL)) && ((0LL - (long long )x1) - (long long )x2 >= 0LL)) && ((long long )x1 - (long long )x2 >= 0LL)) && (x1 == 0)) && (x2 == 0) [2024-02-02 09:22:04,789 INFO L101 nessWitnessExtractor]: Loop invariant at [L41-L43] (unsigned long )_argptr == 0UL [2024-02-02 09:22:04,789 INFO L101 nessWitnessExtractor]: Location invariant before [L50-L50] (unsigned long )_argptr == 0UL [2024-02-02 09:22:04,790 INFO L101 nessWitnessExtractor]: Location invariant before [L45-L45] (unsigned long )_argptr == 0UL [2024-02-02 09:22:04,790 INFO L101 nessWitnessExtractor]: Location invariant before [L53-L53] (unsigned long )_argptr == 0UL [2024-02-02 09:22:04,790 INFO L101 nessWitnessExtractor]: Location invariant before [L60-L60] x2 == 0 [2024-02-02 09:22:04,790 INFO L101 nessWitnessExtractor]: Location invariant before [L22-L25] x2 == 0 [2024-02-02 09:22:04,807 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-02 09:22:04,951 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/test-easy1.wvr.c[1902,1915] [2024-02-02 09:22:04,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:22:04,960 INFO L202 MainTranslator]: Completed pre-run [2024-02-02 09:22:04,972 WARN L424 MainDispatcher]: Unable to annotate extern int pthread_create (pthread_t *__restrict __newthread, const pthread_attr_t *__restrict __attr, void *(*__start_routine) (void *), void *__restrict __arg) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 3))); with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 09:22:05,023 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/test-easy1.wvr.c[1902,1915] [2024-02-02 09:22:05,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:22:05,035 INFO L206 MainTranslator]: Completed translation [2024-02-02 09:22:05,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05 WrapperNode [2024-02-02 09:22:05,036 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 09:22:05,037 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 09:22:05,037 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 09:22:05,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 09:22:05,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,048 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,067 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2024-02-02 09:22:05,067 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 09:22:05,068 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 09:22:05,068 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 09:22:05,068 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 09:22:05,086 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,092 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,112 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]. [2024-02-02 09:22:05,113 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,130 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,134 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,135 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,136 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,138 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 09:22:05,139 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 09:22:05,139 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 09:22:05,139 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 09:22:05,139 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (1/1) ... [2024-02-02 09:22:05,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:22:05,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:05,164 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) [2024-02-02 09:22:05,175 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 [2024-02-02 09:22:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 09:22:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-02 09:22:05,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-02 09:22:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-02 09:22:05,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-02 09:22:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 09:22:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 09:22:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 09:22:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 09:22:05,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 09:22:05,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 09:22:05,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 09:22:05,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 09:22:05,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 09:22:05,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-02 09:22:05,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-02 09:22:05,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-02 09:22:05,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 09:22:05,210 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 09:22:05,295 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 09:22:05,297 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 09:22:05,448 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 09:22:05,449 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 09:22:05,523 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 09:22:05,523 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-02 09:22:05,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:22:05 BoogieIcfgContainer [2024-02-02 09:22:05,574 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 09:22:05,576 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 09:22:05,577 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 09:22:05,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 09:22:05,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:22:03" (1/4) ... [2024-02-02 09:22:05,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c88952 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:22:05, skipping insertion in model container [2024-02-02 09:22:05,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 09:22:04" (2/4) ... [2024-02-02 09:22:05,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c88952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:22:05, skipping insertion in model container [2024-02-02 09:22:05,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:05" (3/4) ... [2024-02-02 09:22:05,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c88952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:22:05, skipping insertion in model container [2024-02-02 09:22:05,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:22:05" (4/4) ... [2024-02-02 09:22:05,584 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2024-02-02 09:22:05,598 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 09:22:05,599 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-02-02 09:22:05,599 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 09:22:05,674 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-02 09:22:05,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 39 transitions, 92 flow [2024-02-02 09:22:05,753 INFO L124 PetriNetUnfolderBase]: 2/37 cut-off events. [2024-02-02 09:22:05,755 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:22:05,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 37 events. 2/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 73 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-02-02 09:22:05,759 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 39 transitions, 92 flow [2024-02-02 09:22:05,762 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 36 transitions, 84 flow [2024-02-02 09:22:05,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:22:05,787 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;@4d7fcdcc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:22:05,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-02 09:22:05,791 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:22:05,792 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 09:22:05,792 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:22:05,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:05,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 09:22:05,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:05,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash 8216, now seen corresponding path program 1 times [2024-02-02 09:22:05,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:05,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788087562] [2024-02-02 09:22:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:05,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:05,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:05,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788087562] [2024-02-02 09:22:05,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788087562] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:05,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:05,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:22:05,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476646729] [2024-02-02 09:22:05,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:05,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:22:06,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:06,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:22:06,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:22:06,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:06,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2024-02-02 09:22:06,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:06,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:06,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:06,109 INFO L124 PetriNetUnfolderBase]: 49/132 cut-off events. [2024-02-02 09:22:06,109 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-02-02 09:22:06,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 132 events. 49/132 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 597 event pairs, 45 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 196. Up to 99 conditions per place. [2024-02-02 09:22:06,114 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 16 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-02-02 09:22:06,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 118 flow [2024-02-02 09:22:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:22:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:22:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-02-02 09:22:06,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6495726495726496 [2024-02-02 09:22:06,125 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 84 flow. Second operand 3 states and 76 transitions. [2024-02-02 09:22:06,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 118 flow [2024-02-02 09:22:06,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:06,129 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 78 flow [2024-02-02 09:22:06,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=3, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-02-02 09:22:06,135 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-02-02 09:22:06,135 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 78 flow [2024-02-02 09:22:06,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2024-02-02 09:22:06,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:06,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-02 09:22:06,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 09:22:06,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:06,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:06,138 INFO L85 PathProgramCache]: Analyzing trace with hash 254951, now seen corresponding path program 1 times [2024-02-02 09:22:06,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:06,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509872242] [2024-02-02 09:22:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:06,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:06,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:06,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509872242] [2024-02-02 09:22:06,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509872242] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:06,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:06,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:22:06,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126893924] [2024-02-02 09:22:06,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:06,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:22:06,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:22:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:22:06,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 39 [2024-02-02 09:22:06,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:06,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:06,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 39 [2024-02-02 09:22:06,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:06,257 INFO L124 PetriNetUnfolderBase]: 49/131 cut-off events. [2024-02-02 09:22:06,257 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-02 09:22:06,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 131 events. 49/131 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 597 event pairs, 45 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 230. Up to 97 conditions per place. [2024-02-02 09:22:06,261 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 15 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-02-02 09:22:06,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 110 flow [2024-02-02 09:22:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:22:06,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:22:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-02-02 09:22:06,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-02-02 09:22:06,266 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 78 flow. Second operand 3 states and 78 transitions. [2024-02-02 09:22:06,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 110 flow [2024-02-02 09:22:06,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:06,273 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 76 flow [2024-02-02 09:22:06,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-02-02 09:22:06,274 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-02-02 09:22:06,274 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 76 flow [2024-02-02 09:22:06,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:06,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:06,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-02 09:22:06,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 09:22:06,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:06,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash -994405158, now seen corresponding path program 1 times [2024-02-02 09:22:06,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:06,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096613564] [2024-02-02 09:22:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:06,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:06,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:06,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096613564] [2024-02-02 09:22:06,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096613564] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:06,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:06,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:06,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511612265] [2024-02-02 09:22:06,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:06,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:06,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:06,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:06,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:06,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-02-02 09:22:06,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2024-02-02 09:22:06,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:06,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-02-02 09:22:06,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:06,461 INFO L124 PetriNetUnfolderBase]: 82/193 cut-off events. [2024-02-02 09:22:06,462 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-02 09:22:06,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 193 events. 82/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 782 event pairs, 27 based on Foata normal form. 20/198 useless extension candidates. Maximal degree in co-relation 333. Up to 124 conditions per place. [2024-02-02 09:22:06,463 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 22 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-02-02 09:22:06,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 129 flow [2024-02-02 09:22:06,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:22:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:22:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-02-02 09:22:06,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-02-02 09:22:06,465 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 76 flow. Second operand 4 states and 92 transitions. [2024-02-02 09:22:06,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 129 flow [2024-02-02 09:22:06,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 125 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:06,466 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 68 flow [2024-02-02 09:22:06,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-02-02 09:22:06,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2024-02-02 09:22:06,467 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 68 flow [2024-02-02 09:22:06,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2024-02-02 09:22:06,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:06,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:06,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 09:22:06,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:06,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2141541519, now seen corresponding path program 1 times [2024-02-02 09:22:06,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:06,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855942335] [2024-02-02 09:22:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:06,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:06,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:06,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855942335] [2024-02-02 09:22:06,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855942335] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:06,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:06,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:06,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872930365] [2024-02-02 09:22:06,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:06,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:06,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:06,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-02-02 09:22:06,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 68 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) [2024-02-02 09:22:06,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:06,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-02-02 09:22:06,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:06,627 INFO L124 PetriNetUnfolderBase]: 68/155 cut-off events. [2024-02-02 09:22:06,628 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-02 09:22:06,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 155 events. 68/155 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 635 event pairs, 5 based on Foata normal form. 20/172 useless extension candidates. Maximal degree in co-relation 270. Up to 90 conditions per place. [2024-02-02 09:22:06,629 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 25 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-02-02 09:22:06,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 133 flow [2024-02-02 09:22:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:22:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:22:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-02-02 09:22:06,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-02-02 09:22:06,631 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 68 flow. Second operand 4 states and 95 transitions. [2024-02-02 09:22:06,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 133 flow [2024-02-02 09:22:06,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:06,633 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 61 flow [2024-02-02 09:22:06,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-02-02 09:22:06,634 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -10 predicate places. [2024-02-02 09:22:06,634 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 61 flow [2024-02-02 09:22:06,634 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) [2024-02-02 09:22:06,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:06,634 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] [2024-02-02 09:22:06,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 09:22:06,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:06,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:06,635 INFO L85 PathProgramCache]: Analyzing trace with hash 602304769, now seen corresponding path program 1 times [2024-02-02 09:22:06,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:06,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136012839] [2024-02-02 09:22:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:06,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:06,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136012839] [2024-02-02 09:22:06,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136012839] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:06,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:06,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:06,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377280603] [2024-02-02 09:22:06,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:06,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:22:06,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:22:06,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:22:06,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 39 [2024-02-02 09:22:06,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2024-02-02 09:22:06,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:06,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 39 [2024-02-02 09:22:06,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:06,748 INFO L124 PetriNetUnfolderBase]: 113/239 cut-off events. [2024-02-02 09:22:06,749 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-02 09:22:06,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 239 events. 113/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 995 event pairs, 24 based on Foata normal form. 1/226 useless extension candidates. Maximal degree in co-relation 437. Up to 137 conditions per place. [2024-02-02 09:22:06,750 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 23 selfloop transitions, 5 changer transitions 1/38 dead transitions. [2024-02-02 09:22:06,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 148 flow [2024-02-02 09:22:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:22:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:22:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-02-02 09:22:06,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2024-02-02 09:22:06,752 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 61 flow. Second operand 3 states and 93 transitions. [2024-02-02 09:22:06,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 148 flow [2024-02-02 09:22:06,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 143 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:06,754 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 83 flow [2024-02-02 09:22:06,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2024-02-02 09:22:06,755 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -9 predicate places. [2024-02-02 09:22:06,755 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 83 flow [2024-02-02 09:22:06,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2024-02-02 09:22:06,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:06,756 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] [2024-02-02 09:22:06,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 09:22:06,756 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:06,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:06,756 INFO L85 PathProgramCache]: Analyzing trace with hash -625713592, now seen corresponding path program 1 times [2024-02-02 09:22:06,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:06,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644923708] [2024-02-02 09:22:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:06,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:06,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:06,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644923708] [2024-02-02 09:22:06,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644923708] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:06,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:06,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:22:06,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570423396] [2024-02-02 09:22:06,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:06,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:06,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:06,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:06,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-02-02 09:22:06,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:06,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:06,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:06,910 INFO L124 PetriNetUnfolderBase]: 197/375 cut-off events. [2024-02-02 09:22:06,911 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-02-02 09:22:06,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 375 events. 197/375 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1628 event pairs, 35 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 807. Up to 157 conditions per place. [2024-02-02 09:22:06,913 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 38 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2024-02-02 09:22:06,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 258 flow [2024-02-02 09:22:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:22:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:22:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-02-02 09:22:06,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7230769230769231 [2024-02-02 09:22:06,915 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 83 flow. Second operand 5 states and 141 transitions. [2024-02-02 09:22:06,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 258 flow [2024-02-02 09:22:06,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 56 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:22:06,917 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 148 flow [2024-02-02 09:22:06,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-02-02 09:22:06,918 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-02-02 09:22:06,918 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 148 flow [2024-02-02 09:22:06,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-02-02 09:22:06,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:06,919 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] [2024-02-02 09:22:06,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 09:22:06,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:06,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1928405078, now seen corresponding path program 2 times [2024-02-02 09:22:06,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:06,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595725729] [2024-02-02 09:22:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:06,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:06,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595725729] [2024-02-02 09:22:06,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595725729] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562943172] [2024-02-02 09:22:06,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:22:06,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:06,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:06,969 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) [2024-02-02 09:22:06,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-02 09:22:07,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:22:07,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:07,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-02 09:22:07,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:07,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:07,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562943172] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:07,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-02 09:22:07,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2024-02-02 09:22:07,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283262325] [2024-02-02 09:22:07,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:07,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:07,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-02 09:22:07,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:07,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-02-02 09:22:07,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:07,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:07,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:07,394 INFO L124 PetriNetUnfolderBase]: 185/356 cut-off events. [2024-02-02 09:22:07,394 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2024-02-02 09:22:07,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 356 events. 185/356 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1506 event pairs, 44 based on Foata normal form. 12/358 useless extension candidates. Maximal degree in co-relation 956. Up to 128 conditions per place. [2024-02-02 09:22:07,397 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 35 selfloop transitions, 13 changer transitions 2/57 dead transitions. [2024-02-02 09:22:07,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 321 flow [2024-02-02 09:22:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:22:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:22:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-02-02 09:22:07,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-02-02 09:22:07,399 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 148 flow. Second operand 4 states and 117 transitions. [2024-02-02 09:22:07,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 321 flow [2024-02-02 09:22:07,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 57 transitions, 321 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-02 09:22:07,404 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 221 flow [2024-02-02 09:22:07,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-02-02 09:22:07,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-02-02 09:22:07,406 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 221 flow [2024-02-02 09:22:07,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-02-02 09:22:07,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:07,407 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] [2024-02-02 09:22:07,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:07,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:07,620 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:07,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:07,621 INFO L85 PathProgramCache]: Analyzing trace with hash -467425689, now seen corresponding path program 1 times [2024-02-02 09:22:07,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:07,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480543701] [2024-02-02 09:22:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:07,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:07,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:07,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480543701] [2024-02-02 09:22:07,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480543701] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:07,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:07,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:22:07,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043473260] [2024-02-02 09:22:07,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:07,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:07,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:07,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:07,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:07,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:07,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-02-02 09:22:07,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:07,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:07,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:07,784 INFO L124 PetriNetUnfolderBase]: 215/443 cut-off events. [2024-02-02 09:22:07,784 INFO L125 PetriNetUnfolderBase]: For 1057/1057 co-relation queries the response was YES. [2024-02-02 09:22:07,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 443 events. 215/443 cut-off events. For 1057/1057 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1988 event pairs, 53 based on Foata normal form. 18/455 useless extension candidates. Maximal degree in co-relation 1393. Up to 159 conditions per place. [2024-02-02 09:22:07,787 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 50 selfloop transitions, 12 changer transitions 2/71 dead transitions. [2024-02-02 09:22:07,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 71 transitions, 508 flow [2024-02-02 09:22:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:22:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:22:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-02-02 09:22:07,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2024-02-02 09:22:07,788 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 221 flow. Second operand 5 states and 145 transitions. [2024-02-02 09:22:07,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 71 transitions, 508 flow [2024-02-02 09:22:07,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-02 09:22:07,791 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 331 flow [2024-02-02 09:22:07,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-02-02 09:22:07,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-02-02 09:22:07,791 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 331 flow [2024-02-02 09:22:07,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-02-02 09:22:07,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:07,792 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] [2024-02-02 09:22:07,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-02 09:22:07,792 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:07,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:07,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1846548541, now seen corresponding path program 2 times [2024-02-02 09:22:07,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:07,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997188056] [2024-02-02 09:22:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:07,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:07,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:07,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997188056] [2024-02-02 09:22:07,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997188056] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:07,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:07,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:22:07,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867678222] [2024-02-02 09:22:07,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:07,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:07,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:07,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:07,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:07,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:07,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-02-02 09:22:07,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:07,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:07,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:07,926 INFO L124 PetriNetUnfolderBase]: 173/346 cut-off events. [2024-02-02 09:22:07,927 INFO L125 PetriNetUnfolderBase]: For 1246/1246 co-relation queries the response was YES. [2024-02-02 09:22:07,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1296 conditions, 346 events. 173/346 cut-off events. For 1246/1246 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1395 event pairs, 42 based on Foata normal form. 10/349 useless extension candidates. Maximal degree in co-relation 1256. Up to 186 conditions per place. [2024-02-02 09:22:07,929 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 42 selfloop transitions, 14 changer transitions 7/70 dead transitions. [2024-02-02 09:22:07,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 554 flow [2024-02-02 09:22:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:22:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:22:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-02-02 09:22:07,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-02-02 09:22:07,930 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 331 flow. Second operand 5 states and 143 transitions. [2024-02-02 09:22:07,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 554 flow [2024-02-02 09:22:07,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 70 transitions, 544 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-02-02 09:22:07,934 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 363 flow [2024-02-02 09:22:07,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2024-02-02 09:22:07,934 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-02-02 09:22:07,934 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 363 flow [2024-02-02 09:22:07,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-02-02 09:22:07,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:07,935 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] [2024-02-02 09:22:07,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 09:22:07,935 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:07,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:07,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1211539710, now seen corresponding path program 1 times [2024-02-02 09:22:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:07,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234604590] [2024-02-02 09:22:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:07,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:08,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:08,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234604590] [2024-02-02 09:22:08,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234604590] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:08,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110428570] [2024-02-02 09:22:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:08,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:08,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:08,041 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) [2024-02-02 09:22:08,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-02 09:22:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:08,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-02 09:22:08,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:08,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:08,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110428570] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:08,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:08,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-02 09:22:08,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175146175] [2024-02-02 09:22:08,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:08,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-02 09:22:08,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:08,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-02 09:22:08,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2024-02-02 09:22:08,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-02-02 09:22:08,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 363 flow. Second operand has 16 states, 16 states have (on average 20.0625) internal successors, (321), 16 states have internal predecessors, (321), 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) [2024-02-02 09:22:08,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:08,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-02-02 09:22:08,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:08,771 INFO L124 PetriNetUnfolderBase]: 411/804 cut-off events. [2024-02-02 09:22:08,772 INFO L125 PetriNetUnfolderBase]: For 4545/4545 co-relation queries the response was YES. [2024-02-02 09:22:08,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 804 events. 411/804 cut-off events. For 4545/4545 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4051 event pairs, 16 based on Foata normal form. 46/847 useless extension candidates. Maximal degree in co-relation 3380. Up to 180 conditions per place. [2024-02-02 09:22:08,777 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 113 selfloop transitions, 48 changer transitions 11/179 dead transitions. [2024-02-02 09:22:08,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 179 transitions, 1598 flow [2024-02-02 09:22:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-02 09:22:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-02 09:22:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 485 transitions. [2024-02-02 09:22:08,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-02-02 09:22:08,779 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 363 flow. Second operand 20 states and 485 transitions. [2024-02-02 09:22:08,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 179 transitions, 1598 flow [2024-02-02 09:22:08,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 179 transitions, 1558 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-02-02 09:22:08,785 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 1025 flow [2024-02-02 09:22:08,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1025, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2024-02-02 09:22:08,786 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-02-02 09:22:08,786 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 1025 flow [2024-02-02 09:22:08,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.0625) internal successors, (321), 16 states have internal predecessors, (321), 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) [2024-02-02 09:22:08,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:08,787 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] [2024-02-02 09:22:08,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:08,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-02 09:22:08,999 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:08,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:08,999 INFO L85 PathProgramCache]: Analyzing trace with hash 672126678, now seen corresponding path program 2 times [2024-02-02 09:22:08,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:08,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215807807] [2024-02-02 09:22:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:09,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:09,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:09,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215807807] [2024-02-02 09:22:09,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215807807] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:09,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117693544] [2024-02-02 09:22:09,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:22:09,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:09,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:09,114 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) [2024-02-02 09:22:09,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-02 09:22:09,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:22:09,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:09,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-02 09:22:09,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:09,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-02 09:22:09,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117693544] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:09,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:09,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 10 [2024-02-02 09:22:09,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309308464] [2024-02-02 09:22:09,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:09,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-02 09:22:09,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-02 09:22:09,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-02-02 09:22:09,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-02-02 09:22:09,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 1025 flow. Second operand has 10 states, 10 states have (on average 21.3) internal successors, (213), 10 states have internal predecessors, (213), 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) [2024-02-02 09:22:09,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:09,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-02-02 09:22:09,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:09,536 INFO L124 PetriNetUnfolderBase]: 591/1164 cut-off events. [2024-02-02 09:22:09,536 INFO L125 PetriNetUnfolderBase]: For 10536/10536 co-relation queries the response was YES. [2024-02-02 09:22:09,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5957 conditions, 1164 events. 591/1164 cut-off events. For 10536/10536 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6481 event pairs, 68 based on Foata normal form. 27/1188 useless extension candidates. Maximal degree in co-relation 5891. Up to 614 conditions per place. [2024-02-02 09:22:09,546 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 137 selfloop transitions, 48 changer transitions 1/193 dead transitions. [2024-02-02 09:22:09,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 193 transitions, 2393 flow [2024-02-02 09:22:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-02 09:22:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-02 09:22:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 309 transitions. [2024-02-02 09:22:09,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-02-02 09:22:09,548 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 1025 flow. Second operand 12 states and 309 transitions. [2024-02-02 09:22:09,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 193 transitions, 2393 flow [2024-02-02 09:22:09,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 193 transitions, 2235 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-02-02 09:22:09,580 INFO L231 Difference]: Finished difference. Result has 103 places, 125 transitions, 1607 flow [2024-02-02 09:22:09,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1607, PETRI_PLACES=103, PETRI_TRANSITIONS=125} [2024-02-02 09:22:09,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-02-02 09:22:09,581 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 125 transitions, 1607 flow [2024-02-02 09:22:09,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.3) internal successors, (213), 10 states have internal predecessors, (213), 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) [2024-02-02 09:22:09,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:09,581 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-02 09:22:09,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:09,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:09,794 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:09,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:09,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1443257332, now seen corresponding path program 3 times [2024-02-02 09:22:09,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:09,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232705546] [2024-02-02 09:22:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:09,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:09,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232705546] [2024-02-02 09:22:09,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232705546] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:09,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983772857] [2024-02-02 09:22:09,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-02 09:22:09,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:09,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:09,885 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) [2024-02-02 09:22:09,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-02 09:22:09,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-02 09:22:09,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:09,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-02 09:22:09,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:10,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:10,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983772857] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:10,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:10,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-02-02 09:22:10,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824127800] [2024-02-02 09:22:10,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:10,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-02 09:22:10,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:10,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-02 09:22:10,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-02-02 09:22:10,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:10,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 125 transitions, 1607 flow. Second operand has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 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) [2024-02-02 09:22:10,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:10,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:10,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:10,344 INFO L124 PetriNetUnfolderBase]: 681/1344 cut-off events. [2024-02-02 09:22:10,344 INFO L125 PetriNetUnfolderBase]: For 13680/13680 co-relation queries the response was YES. [2024-02-02 09:22:10,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7048 conditions, 1344 events. 681/1344 cut-off events. For 13680/13680 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7724 event pairs, 69 based on Foata normal form. 24/1364 useless extension candidates. Maximal degree in co-relation 6976. Up to 319 conditions per place. [2024-02-02 09:22:10,355 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 114 selfloop transitions, 76 changer transitions 10/207 dead transitions. [2024-02-02 09:22:10,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 207 transitions, 2798 flow [2024-02-02 09:22:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-02 09:22:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-02 09:22:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-02-02 09:22:10,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7102564102564103 [2024-02-02 09:22:10,357 INFO L175 Difference]: Start difference. First operand has 103 places, 125 transitions, 1607 flow. Second operand 10 states and 277 transitions. [2024-02-02 09:22:10,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 207 transitions, 2798 flow [2024-02-02 09:22:10,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 207 transitions, 2714 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-02-02 09:22:10,390 INFO L231 Difference]: Finished difference. Result has 114 places, 144 transitions, 2151 flow [2024-02-02 09:22:10,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2151, PETRI_PLACES=114, PETRI_TRANSITIONS=144} [2024-02-02 09:22:10,391 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-02-02 09:22:10,391 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 144 transitions, 2151 flow [2024-02-02 09:22:10,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 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) [2024-02-02 09:22:10,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:10,391 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-02 09:22:10,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:10,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:10,603 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:10,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1744307336, now seen corresponding path program 4 times [2024-02-02 09:22:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:10,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343049774] [2024-02-02 09:22:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:10,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-02 09:22:10,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:10,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343049774] [2024-02-02 09:22:10,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343049774] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:10,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094351683] [2024-02-02 09:22:10,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-02 09:22:10,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:10,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:10,665 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) [2024-02-02 09:22:10,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-02 09:22:10,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-02 09:22:10,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:10,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-02 09:22:10,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:10,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:10,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094351683] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:10,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:10,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-02-02 09:22:10,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135886886] [2024-02-02 09:22:10,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:10,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-02 09:22:10,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:10,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-02 09:22:10,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-02-02 09:22:10,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-02-02 09:22:10,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 144 transitions, 2151 flow. Second operand has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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) [2024-02-02 09:22:10,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:10,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-02-02 09:22:10,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:11,204 INFO L124 PetriNetUnfolderBase]: 749/1515 cut-off events. [2024-02-02 09:22:11,205 INFO L125 PetriNetUnfolderBase]: For 19002/19002 co-relation queries the response was YES. [2024-02-02 09:22:11,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8479 conditions, 1515 events. 749/1515 cut-off events. For 19002/19002 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8996 event pairs, 52 based on Foata normal form. 8/1520 useless extension candidates. Maximal degree in co-relation 8401. Up to 363 conditions per place. [2024-02-02 09:22:11,219 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 141 selfloop transitions, 104 changer transitions 0/252 dead transitions. [2024-02-02 09:22:11,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 252 transitions, 3546 flow [2024-02-02 09:22:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-02 09:22:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-02 09:22:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 391 transitions. [2024-02-02 09:22:11,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266025641025641 [2024-02-02 09:22:11,221 INFO L175 Difference]: Start difference. First operand has 114 places, 144 transitions, 2151 flow. Second operand 16 states and 391 transitions. [2024-02-02 09:22:11,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 252 transitions, 3546 flow [2024-02-02 09:22:11,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 252 transitions, 3389 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-02-02 09:22:11,277 INFO L231 Difference]: Finished difference. Result has 130 places, 169 transitions, 2776 flow [2024-02-02 09:22:11,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2776, PETRI_PLACES=130, PETRI_TRANSITIONS=169} [2024-02-02 09:22:11,277 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-02-02 09:22:11,278 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 169 transitions, 2776 flow [2024-02-02 09:22:11,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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) [2024-02-02 09:22:11,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:11,278 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-02 09:22:11,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:11,492 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,SelfDestructingSolverStorable12 [2024-02-02 09:22:11,494 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:11,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1799235835, now seen corresponding path program 5 times [2024-02-02 09:22:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481996720] [2024-02-02 09:22:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:11,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481996720] [2024-02-02 09:22:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481996720] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293796073] [2024-02-02 09:22:11,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-02 09:22:11,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:11,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:11,627 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) [2024-02-02 09:22:11,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-02 09:22:11,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-02 09:22:11,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:11,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-02 09:22:11,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:11,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:11,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293796073] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:11,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:11,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-02-02 09:22:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356629182] [2024-02-02 09:22:11,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:11,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-02 09:22:11,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:11,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-02 09:22:11,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-02-02 09:22:11,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:11,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 169 transitions, 2776 flow. Second operand has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 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) [2024-02-02 09:22:11,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:11,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:11,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:12,120 INFO L124 PetriNetUnfolderBase]: 927/1915 cut-off events. [2024-02-02 09:22:12,120 INFO L125 PetriNetUnfolderBase]: For 25347/25347 co-relation queries the response was YES. [2024-02-02 09:22:12,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10641 conditions, 1915 events. 927/1915 cut-off events. For 25347/25347 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12133 event pairs, 105 based on Foata normal form. 20/1931 useless extension candidates. Maximal degree in co-relation 10559. Up to 386 conditions per place. [2024-02-02 09:22:12,135 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 146 selfloop transitions, 97 changer transitions 10/260 dead transitions. [2024-02-02 09:22:12,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 260 transitions, 4476 flow [2024-02-02 09:22:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-02 09:22:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-02 09:22:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 288 transitions. [2024-02-02 09:22:12,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6713286713286714 [2024-02-02 09:22:12,137 INFO L175 Difference]: Start difference. First operand has 130 places, 169 transitions, 2776 flow. Second operand 11 states and 288 transitions. [2024-02-02 09:22:12,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 260 transitions, 4476 flow [2024-02-02 09:22:12,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 260 transitions, 4326 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-02-02 09:22:12,203 INFO L231 Difference]: Finished difference. Result has 144 places, 197 transitions, 3587 flow [2024-02-02 09:22:12,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3587, PETRI_PLACES=144, PETRI_TRANSITIONS=197} [2024-02-02 09:22:12,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-02-02 09:22:12,204 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 197 transitions, 3587 flow [2024-02-02 09:22:12,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 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) [2024-02-02 09:22:12,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:12,204 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-02 09:22:12,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:12,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:12,416 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:12,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:12,417 INFO L85 PathProgramCache]: Analyzing trace with hash -542321819, now seen corresponding path program 6 times [2024-02-02 09:22:12,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:12,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377688608] [2024-02-02 09:22:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:12,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-02 09:22:12,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377688608] [2024-02-02 09:22:12,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377688608] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925337669] [2024-02-02 09:22:12,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-02 09:22:12,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:12,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:12,513 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) [2024-02-02 09:22:12,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-02 09:22:12,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-02 09:22:12,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:12,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-02 09:22:12,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:12,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:12,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925337669] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:12,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:12,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-02-02 09:22:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930294536] [2024-02-02 09:22:12,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:12,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-02 09:22:12,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-02 09:22:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-02-02 09:22:12,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-02-02 09:22:12,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 197 transitions, 3587 flow. Second operand has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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) [2024-02-02 09:22:12,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:12,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-02-02 09:22:12,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:13,136 INFO L124 PetriNetUnfolderBase]: 966/2022 cut-off events. [2024-02-02 09:22:13,136 INFO L125 PetriNetUnfolderBase]: For 29219/29219 co-relation queries the response was YES. [2024-02-02 09:22:13,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11735 conditions, 2022 events. 966/2022 cut-off events. For 29219/29219 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13149 event pairs, 74 based on Foata normal form. 10/2029 useless extension candidates. Maximal degree in co-relation 11644. Up to 393 conditions per place. [2024-02-02 09:22:13,166 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 184 selfloop transitions, 122 changer transitions 1/314 dead transitions. [2024-02-02 09:22:13,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 314 transitions, 5222 flow [2024-02-02 09:22:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-02 09:22:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-02 09:22:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 399 transitions. [2024-02-02 09:22:13,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394230769230769 [2024-02-02 09:22:13,168 INFO L175 Difference]: Start difference. First operand has 144 places, 197 transitions, 3587 flow. Second operand 16 states and 399 transitions. [2024-02-02 09:22:13,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 314 transitions, 5222 flow [2024-02-02 09:22:13,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 314 transitions, 5046 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:13,277 INFO L231 Difference]: Finished difference. Result has 159 places, 218 transitions, 4204 flow [2024-02-02 09:22:13,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3410, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4204, PETRI_PLACES=159, PETRI_TRANSITIONS=218} [2024-02-02 09:22:13,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-02-02 09:22:13,278 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 218 transitions, 4204 flow [2024-02-02 09:22:13,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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) [2024-02-02 09:22:13,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:13,278 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-02-02 09:22:13,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:13,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:13,489 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:13,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:13,490 INFO L85 PathProgramCache]: Analyzing trace with hash -963909138, now seen corresponding path program 7 times [2024-02-02 09:22:13,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:13,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566387504] [2024-02-02 09:22:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:13,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-02 09:22:13,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566387504] [2024-02-02 09:22:13,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566387504] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725594028] [2024-02-02 09:22:13,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-02 09:22:13,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:13,570 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) [2024-02-02 09:22:13,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-02 09:22:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:13,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-02 09:22:13,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:13,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:13,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725594028] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:13,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:13,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-02-02 09:22:13,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846005884] [2024-02-02 09:22:13,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:13,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-02 09:22:13,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:13,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-02 09:22:13,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-02-02 09:22:13,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-02-02 09:22:13,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 218 transitions, 4204 flow. Second operand has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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) [2024-02-02 09:22:13,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:13,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-02-02 09:22:13,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:14,205 INFO L124 PetriNetUnfolderBase]: 932/1940 cut-off events. [2024-02-02 09:22:14,205 INFO L125 PetriNetUnfolderBase]: For 31335/31335 co-relation queries the response was YES. [2024-02-02 09:22:14,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11934 conditions, 1940 events. 932/1940 cut-off events. For 31335/31335 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12373 event pairs, 135 based on Foata normal form. 12/1948 useless extension candidates. Maximal degree in co-relation 11840. Up to 641 conditions per place. [2024-02-02 09:22:14,223 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 165 selfloop transitions, 99 changer transitions 3/274 dead transitions. [2024-02-02 09:22:14,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 274 transitions, 5359 flow [2024-02-02 09:22:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-02 09:22:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-02 09:22:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-02-02 09:22:14,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-02-02 09:22:14,227 INFO L175 Difference]: Start difference. First operand has 159 places, 218 transitions, 4204 flow. Second operand 12 states and 282 transitions. [2024-02-02 09:22:14,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 274 transitions, 5359 flow [2024-02-02 09:22:14,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 274 transitions, 5222 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-02-02 09:22:14,318 INFO L231 Difference]: Finished difference. Result has 168 places, 226 transitions, 4467 flow [2024-02-02 09:22:14,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3974, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4467, PETRI_PLACES=168, PETRI_TRANSITIONS=226} [2024-02-02 09:22:14,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-02-02 09:22:14,319 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 226 transitions, 4467 flow [2024-02-02 09:22:14,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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) [2024-02-02 09:22:14,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:14,320 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:14,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:14,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-02 09:22:14,532 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:14,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:14,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1972266173, now seen corresponding path program 8 times [2024-02-02 09:22:14,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:14,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80395081] [2024-02-02 09:22:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:14,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:14,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:14,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80395081] [2024-02-02 09:22:14,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80395081] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:14,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008242935] [2024-02-02 09:22:14,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:22:14,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:14,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:14,672 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) [2024-02-02 09:22:14,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-02 09:22:14,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:22:14,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:14,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-02 09:22:14,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:14,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:14,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008242935] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:14,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:14,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 16 [2024-02-02 09:22:14,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267019877] [2024-02-02 09:22:14,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:14,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-02 09:22:14,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:14,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-02 09:22:14,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-02-02 09:22:14,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2024-02-02 09:22:14,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 226 transitions, 4467 flow. Second operand has 16 states, 16 states have (on average 21.875) internal successors, (350), 16 states have internal predecessors, (350), 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) [2024-02-02 09:22:14,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:14,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2024-02-02 09:22:14,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:15,828 INFO L124 PetriNetUnfolderBase]: 1824/3750 cut-off events. [2024-02-02 09:22:15,828 INFO L125 PetriNetUnfolderBase]: For 74521/74521 co-relation queries the response was YES. [2024-02-02 09:22:15,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24337 conditions, 3750 events. 1824/3750 cut-off events. For 74521/74521 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 26229 event pairs, 299 based on Foata normal form. 68/3814 useless extension candidates. Maximal degree in co-relation 24239. Up to 1453 conditions per place. [2024-02-02 09:22:15,859 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 355 selfloop transitions, 162 changer transitions 5/529 dead transitions. [2024-02-02 09:22:15,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 529 transitions, 10388 flow [2024-02-02 09:22:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-02 09:22:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-02 09:22:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 515 transitions. [2024-02-02 09:22:15,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6950067476383266 [2024-02-02 09:22:15,862 INFO L175 Difference]: Start difference. First operand has 168 places, 226 transitions, 4467 flow. Second operand 19 states and 515 transitions. [2024-02-02 09:22:15,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 529 transitions, 10388 flow [2024-02-02 09:22:16,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 529 transitions, 10229 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-02-02 09:22:16,175 INFO L231 Difference]: Finished difference. Result has 194 places, 357 transitions, 7739 flow [2024-02-02 09:22:16,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7739, PETRI_PLACES=194, PETRI_TRANSITIONS=357} [2024-02-02 09:22:16,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-02-02 09:22:16,176 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 357 transitions, 7739 flow [2024-02-02 09:22:16,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.875) internal successors, (350), 16 states have internal predecessors, (350), 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) [2024-02-02 09:22:16,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:16,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:16,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-02-02 09:22:16,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-02 09:22:16,390 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:16,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash 564187157, now seen corresponding path program 9 times [2024-02-02 09:22:16,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:16,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457919234] [2024-02-02 09:22:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:16,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:16,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:16,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457919234] [2024-02-02 09:22:16,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457919234] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:16,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373843538] [2024-02-02 09:22:16,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-02 09:22:16,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:16,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:16,533 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) [2024-02-02 09:22:16,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-02 09:22:16,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-02-02 09:22:16,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:16,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-02 09:22:16,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-02 09:22:16,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-02 09:22:16,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373843538] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:16,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:16,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-02-02 09:22:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409179499] [2024-02-02 09:22:16,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:16,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-02 09:22:16,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-02 09:22:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2024-02-02 09:22:16,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:16,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 357 transitions, 7739 flow. Second operand has 18 states, 18 states have (on average 21.77777777777778) internal successors, (392), 18 states have internal predecessors, (392), 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) [2024-02-02 09:22:16,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:16,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:16,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:18,590 INFO L124 PetriNetUnfolderBase]: 3131/6443 cut-off events. [2024-02-02 09:22:18,591 INFO L125 PetriNetUnfolderBase]: For 152958/152958 co-relation queries the response was YES. [2024-02-02 09:22:18,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44887 conditions, 6443 events. 3131/6443 cut-off events. For 152958/152958 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 50776 event pairs, 208 based on Foata normal form. 49/6489 useless extension candidates. Maximal degree in co-relation 44779. Up to 1722 conditions per place. [2024-02-02 09:22:18,642 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 181 selfloop transitions, 481 changer transitions 93/762 dead transitions. [2024-02-02 09:22:18,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 762 transitions, 16699 flow [2024-02-02 09:22:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-02 09:22:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-02 09:22:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 760 transitions. [2024-02-02 09:22:18,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6495726495726496 [2024-02-02 09:22:18,644 INFO L175 Difference]: Start difference. First operand has 194 places, 357 transitions, 7739 flow. Second operand 30 states and 760 transitions. [2024-02-02 09:22:18,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 762 transitions, 16699 flow [2024-02-02 09:22:19,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 762 transitions, 16144 flow, removed 225 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:19,258 INFO L231 Difference]: Finished difference. Result has 230 places, 569 transitions, 13717 flow [2024-02-02 09:22:19,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7263, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=13717, PETRI_PLACES=230, PETRI_TRANSITIONS=569} [2024-02-02 09:22:19,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-02-02 09:22:19,259 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 569 transitions, 13717 flow [2024-02-02 09:22:19,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.77777777777778) internal successors, (392), 18 states have internal predecessors, (392), 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) [2024-02-02 09:22:19,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:19,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:19,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:19,470 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,SelfDestructingSolverStorable17 [2024-02-02 09:22:19,471 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:19,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:19,472 INFO L85 PathProgramCache]: Analyzing trace with hash -624211337, now seen corresponding path program 10 times [2024-02-02 09:22:19,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:19,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431705385] [2024-02-02 09:22:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:19,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:19,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:19,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431705385] [2024-02-02 09:22:19,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431705385] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:19,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780620853] [2024-02-02 09:22:19,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-02 09:22:19,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:19,624 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) [2024-02-02 09:22:19,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-02 09:22:19,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-02 09:22:19,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:19,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-02 09:22:19,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:19,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-02 09:22:19,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780620853] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:19,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:19,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 16 [2024-02-02 09:22:19,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465444867] [2024-02-02 09:22:19,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:19,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-02 09:22:19,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:19,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-02 09:22:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-02-02 09:22:19,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:19,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 569 transitions, 13717 flow. Second operand has 16 states, 16 states have (on average 22.625) internal successors, (362), 16 states have internal predecessors, (362), 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) [2024-02-02 09:22:19,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:19,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:19,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:21,782 INFO L124 PetriNetUnfolderBase]: 3789/7727 cut-off events. [2024-02-02 09:22:21,782 INFO L125 PetriNetUnfolderBase]: For 217892/217895 co-relation queries the response was YES. [2024-02-02 09:22:21,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60021 conditions, 7727 events. 3789/7727 cut-off events. For 217892/217895 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 61605 event pairs, 829 based on Foata normal form. 75/7798 useless extension candidates. Maximal degree in co-relation 59902. Up to 4861 conditions per place. [2024-02-02 09:22:21,860 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 720 selfloop transitions, 242 changer transitions 9/978 dead transitions. [2024-02-02 09:22:21,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 978 transitions, 24590 flow [2024-02-02 09:22:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-02 09:22:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-02 09:22:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 528 transitions. [2024-02-02 09:22:21,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7125506072874493 [2024-02-02 09:22:21,862 INFO L175 Difference]: Start difference. First operand has 230 places, 569 transitions, 13717 flow. Second operand 19 states and 528 transitions. [2024-02-02 09:22:21,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 978 transitions, 24590 flow [2024-02-02 09:22:23,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 978 transitions, 22134 flow, removed 675 selfloop flow, removed 24 redundant places. [2024-02-02 09:22:23,233 INFO L231 Difference]: Finished difference. Result has 231 places, 781 transitions, 18017 flow [2024-02-02 09:22:23,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=12514, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=18017, PETRI_PLACES=231, PETRI_TRANSITIONS=781} [2024-02-02 09:22:23,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-02-02 09:22:23,234 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 781 transitions, 18017 flow [2024-02-02 09:22:23,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.625) internal successors, (362), 16 states have internal predecessors, (362), 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) [2024-02-02 09:22:23,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:23,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:23,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:23,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:23,445 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:23,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:23,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1526214853, now seen corresponding path program 11 times [2024-02-02 09:22:23,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:23,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425290642] [2024-02-02 09:22:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:23,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:23,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:23,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425290642] [2024-02-02 09:22:23,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425290642] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:23,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872695044] [2024-02-02 09:22:23,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-02 09:22:23,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:23,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:23,572 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) [2024-02-02 09:22:23,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-02 09:22:23,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-02 09:22:23,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:23,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-02 09:22:23,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:23,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-02 09:22:23,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872695044] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:23,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:23,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 14 [2024-02-02 09:22:23,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983837237] [2024-02-02 09:22:23,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:23,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-02 09:22:23,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:23,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-02 09:22:23,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-02-02 09:22:23,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-02-02 09:22:23,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 781 transitions, 18017 flow. Second operand has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 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) [2024-02-02 09:22:23,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:23,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-02-02 09:22:23,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:26,744 INFO L124 PetriNetUnfolderBase]: 4954/9997 cut-off events. [2024-02-02 09:22:26,745 INFO L125 PetriNetUnfolderBase]: For 275612/275612 co-relation queries the response was YES. [2024-02-02 09:22:26,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76814 conditions, 9997 events. 4954/9997 cut-off events. For 275612/275612 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 83146 event pairs, 916 based on Foata normal form. 119/10113 useless extension candidates. Maximal degree in co-relation 76690. Up to 5330 conditions per place. [2024-02-02 09:22:26,832 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 756 selfloop transitions, 433 changer transitions 15/1211 dead transitions. [2024-02-02 09:22:26,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 1211 transitions, 29442 flow [2024-02-02 09:22:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-02 09:22:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-02 09:22:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 568 transitions. [2024-02-02 09:22:26,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.633221850613155 [2024-02-02 09:22:26,834 INFO L175 Difference]: Start difference. First operand has 231 places, 781 transitions, 18017 flow. Second operand 23 states and 568 transitions. [2024-02-02 09:22:26,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 1211 transitions, 29442 flow [2024-02-02 09:22:28,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 1211 transitions, 29108 flow, removed 133 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:28,460 INFO L231 Difference]: Finished difference. Result has 267 places, 1044 transitions, 26161 flow [2024-02-02 09:22:28,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=17600, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=26161, PETRI_PLACES=267, PETRI_TRANSITIONS=1044} [2024-02-02 09:22:28,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-02-02 09:22:28,462 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 1044 transitions, 26161 flow [2024-02-02 09:22:28,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.785714285714285) internal successors, (291), 14 states have internal predecessors, (291), 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) [2024-02-02 09:22:28,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:28,462 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:28,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:28,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:28,673 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:28,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:28,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1313376116, now seen corresponding path program 12 times [2024-02-02 09:22:28,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:28,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580784960] [2024-02-02 09:22:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:28,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580784960] [2024-02-02 09:22:28,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580784960] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961576551] [2024-02-02 09:22:28,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-02 09:22:28,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:28,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:28,778 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) [2024-02-02 09:22:28,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-02 09:22:28,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-02 09:22:28,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:28,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-02 09:22:28,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:28,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:29,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961576551] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:29,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:29,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-02-02 09:22:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079956021] [2024-02-02 09:22:29,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:29,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-02 09:22:29,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-02 09:22:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2024-02-02 09:22:29,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:29,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 1044 transitions, 26161 flow. Second operand has 15 states, 15 states have (on average 22.2) internal successors, (333), 15 states have internal predecessors, (333), 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) [2024-02-02 09:22:29,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:29,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:29,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:33,465 INFO L124 PetriNetUnfolderBase]: 5651/11491 cut-off events. [2024-02-02 09:22:33,465 INFO L125 PetriNetUnfolderBase]: For 368328/368328 co-relation queries the response was YES. [2024-02-02 09:22:33,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94761 conditions, 11491 events. 5651/11491 cut-off events. For 368328/368328 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 98676 event pairs, 342 based on Foata normal form. 50/11538 useless extension candidates. Maximal degree in co-relation 94618. Up to 2428 conditions per place. [2024-02-02 09:22:33,584 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 603 selfloop transitions, 816 changer transitions 7/1433 dead transitions. [2024-02-02 09:22:33,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1433 transitions, 37554 flow [2024-02-02 09:22:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-02 09:22:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-02 09:22:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 679 transitions. [2024-02-02 09:22:33,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6696252465483234 [2024-02-02 09:22:33,586 INFO L175 Difference]: Start difference. First operand has 267 places, 1044 transitions, 26161 flow. Second operand 26 states and 679 transitions. [2024-02-02 09:22:33,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1433 transitions, 37554 flow [2024-02-02 09:22:36,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1433 transitions, 36815 flow, removed 365 selfloop flow, removed 3 redundant places. [2024-02-02 09:22:36,445 INFO L231 Difference]: Finished difference. Result has 299 places, 1212 transitions, 33523 flow [2024-02-02 09:22:36,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=25286, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=644, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=33523, PETRI_PLACES=299, PETRI_TRANSITIONS=1212} [2024-02-02 09:22:36,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-02-02 09:22:36,446 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 1212 transitions, 33523 flow [2024-02-02 09:22:36,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.2) internal successors, (333), 15 states have internal predecessors, (333), 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) [2024-02-02 09:22:36,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:36,447 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:36,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-02-02 09:22:36,652 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,SelfDestructingSolverStorable20 [2024-02-02 09:22:36,652 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:36,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash 384511034, now seen corresponding path program 13 times [2024-02-02 09:22:36,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:36,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297249700] [2024-02-02 09:22:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-02 09:22:36,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:36,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297249700] [2024-02-02 09:22:36,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297249700] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:36,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553228882] [2024-02-02 09:22:36,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-02 09:22:36,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:36,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:36,719 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) [2024-02-02 09:22:36,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-02 09:22:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:36,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-02 09:22:36,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:37,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:37,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553228882] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:37,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:37,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-02 09:22:37,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460083177] [2024-02-02 09:22:37,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:37,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-02 09:22:37,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:37,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-02 09:22:37,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2024-02-02 09:22:37,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2024-02-02 09:22:37,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 1212 transitions, 33523 flow. Second operand has 16 states, 16 states have (on average 21.3125) internal successors, (341), 16 states have internal predecessors, (341), 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) [2024-02-02 09:22:37,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:37,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2024-02-02 09:22:37,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:42,121 INFO L124 PetriNetUnfolderBase]: 5908/11783 cut-off events. [2024-02-02 09:22:42,121 INFO L125 PetriNetUnfolderBase]: For 463316/463319 co-relation queries the response was YES. [2024-02-02 09:22:42,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107242 conditions, 11783 events. 5908/11783 cut-off events. For 463316/463319 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 99950 event pairs, 503 based on Foata normal form. 18/11797 useless extension candidates. Maximal degree in co-relation 107087. Up to 2351 conditions per place. [2024-02-02 09:22:42,266 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 703 selfloop transitions, 788 changer transitions 9/1507 dead transitions. [2024-02-02 09:22:42,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1507 transitions, 43799 flow [2024-02-02 09:22:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-02 09:22:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-02 09:22:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 508 transitions. [2024-02-02 09:22:42,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202686202686203 [2024-02-02 09:22:42,280 INFO L175 Difference]: Start difference. First operand has 299 places, 1212 transitions, 33523 flow. Second operand 21 states and 508 transitions. [2024-02-02 09:22:42,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1507 transitions, 43799 flow [2024-02-02 09:22:46,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1507 transitions, 42743 flow, removed 519 selfloop flow, removed 5 redundant places. [2024-02-02 09:22:46,124 INFO L231 Difference]: Finished difference. Result has 313 places, 1293 transitions, 36846 flow [2024-02-02 09:22:46,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=32546, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=36846, PETRI_PLACES=313, PETRI_TRANSITIONS=1293} [2024-02-02 09:22:46,125 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-02-02 09:22:46,125 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 1293 transitions, 36846 flow [2024-02-02 09:22:46,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.3125) internal successors, (341), 16 states have internal predecessors, (341), 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) [2024-02-02 09:22:46,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:46,126 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:46,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-02-02 09:22:46,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:46,336 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:46,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:46,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1400318531, now seen corresponding path program 14 times [2024-02-02 09:22:46,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:46,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691632862] [2024-02-02 09:22:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:46,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:46,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:46,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691632862] [2024-02-02 09:22:46,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691632862] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:46,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676020901] [2024-02-02 09:22:46,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:22:46,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:46,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:46,481 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:22:46,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-02 09:22:46,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:22:46,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:46,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-02 09:22:46,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:46,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:46,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676020901] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:46,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:46,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-02-02 09:22:46,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549762865] [2024-02-02 09:22:46,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:46,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-02 09:22:46,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:46,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-02 09:22:46,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-02-02 09:22:46,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:22:46,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 1293 transitions, 36846 flow. Second operand has 14 states, 14 states have (on average 22.357142857142858) internal successors, (313), 14 states have internal predecessors, (313), 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) [2024-02-02 09:22:46,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:46,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:22:46,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:52,326 INFO L124 PetriNetUnfolderBase]: 6379/13023 cut-off events. [2024-02-02 09:22:52,326 INFO L125 PetriNetUnfolderBase]: For 507080/507083 co-relation queries the response was YES. [2024-02-02 09:22:52,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115979 conditions, 13023 events. 6379/13023 cut-off events. For 507080/507083 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 114694 event pairs, 619 based on Foata normal form. 140/13159 useless extension candidates. Maximal degree in co-relation 115823. Up to 3498 conditions per place. [2024-02-02 09:22:52,498 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 788 selfloop transitions, 681 changer transitions 92/1568 dead transitions. [2024-02-02 09:22:52,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 1568 transitions, 46800 flow [2024-02-02 09:22:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-02 09:22:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-02 09:22:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 360 transitions. [2024-02-02 09:22:52,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7100591715976331 [2024-02-02 09:22:52,517 INFO L175 Difference]: Start difference. First operand has 313 places, 1293 transitions, 36846 flow. Second operand 13 states and 360 transitions. [2024-02-02 09:22:52,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 1568 transitions, 46800 flow [2024-02-02 09:22:56,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1568 transitions, 45938 flow, removed 256 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:56,437 INFO L231 Difference]: Finished difference. Result has 328 places, 1343 transitions, 40402 flow [2024-02-02 09:22:56,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=35646, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=40402, PETRI_PLACES=328, PETRI_TRANSITIONS=1343} [2024-02-02 09:22:56,438 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-02-02 09:22:56,439 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 1343 transitions, 40402 flow [2024-02-02 09:22:56,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.357142857142858) internal successors, (313), 14 states have internal predecessors, (313), 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) [2024-02-02 09:22:56,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:56,439 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:56,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-02-02 09:22:56,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:56,651 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:22:56,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:56,651 INFO L85 PathProgramCache]: Analyzing trace with hash -706193205, now seen corresponding path program 15 times [2024-02-02 09:22:56,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:56,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160125125] [2024-02-02 09:22:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:56,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-02 09:22:56,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:56,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160125125] [2024-02-02 09:22:56,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160125125] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:56,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319672615] [2024-02-02 09:22:56,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-02 09:22:56,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:56,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:56,733 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:22:56,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-02 09:22:56,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-02 09:22:56,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:56,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-02 09:22:56,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:56,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:56,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319672615] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:56,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:56,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-02 09:22:56,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162315654] [2024-02-02 09:22:56,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:56,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-02 09:22:56,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:56,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-02 09:22:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-02-02 09:22:57,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-02-02 09:22:57,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 1343 transitions, 40402 flow. Second operand has 16 states, 16 states have (on average 20.3125) internal successors, (325), 16 states have internal predecessors, (325), 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) [2024-02-02 09:22:57,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:57,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-02-02 09:22:57,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:02,469 INFO L124 PetriNetUnfolderBase]: 5891/12111 cut-off events. [2024-02-02 09:23:02,470 INFO L125 PetriNetUnfolderBase]: For 489942/489942 co-relation queries the response was YES. [2024-02-02 09:23:02,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111854 conditions, 12111 events. 5891/12111 cut-off events. For 489942/489942 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 105951 event pairs, 488 based on Foata normal form. 12/12120 useless extension candidates. Maximal degree in co-relation 111690. Up to 3578 conditions per place. [2024-02-02 09:23:02,636 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 736 selfloop transitions, 821 changer transitions 0/1564 dead transitions. [2024-02-02 09:23:02,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1564 transitions, 47165 flow [2024-02-02 09:23:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-02 09:23:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-02 09:23:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 681 transitions. [2024-02-02 09:23:02,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021220159151194 [2024-02-02 09:23:02,638 INFO L175 Difference]: Start difference. First operand has 328 places, 1343 transitions, 40402 flow. Second operand 29 states and 681 transitions. [2024-02-02 09:23:02,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1564 transitions, 47165 flow [2024-02-02 09:23:06,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1564 transitions, 46065 flow, removed 504 selfloop flow, removed 5 redundant places. [2024-02-02 09:23:06,935 INFO L231 Difference]: Finished difference. Result has 356 places, 1385 transitions, 42684 flow [2024-02-02 09:23:06,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=39236, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=777, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=42684, PETRI_PLACES=356, PETRI_TRANSITIONS=1385} [2024-02-02 09:23:06,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-02-02 09:23:06,937 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1385 transitions, 42684 flow [2024-02-02 09:23:06,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.3125) internal successors, (325), 16 states have internal predecessors, (325), 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) [2024-02-02 09:23:06,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:06,937 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:06,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-02-02 09:23:07,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-02-02 09:23:07,149 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:23:07,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:07,149 INFO L85 PathProgramCache]: Analyzing trace with hash -80137474, now seen corresponding path program 16 times [2024-02-02 09:23:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:07,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119510782] [2024-02-02 09:23:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:07,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-02 09:23:07,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:07,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119510782] [2024-02-02 09:23:07,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119510782] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:23:07,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790667894] [2024-02-02 09:23:07,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-02 09:23:07,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:07,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:23:07,212 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:23:07,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-02 09:23:07,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-02 09:23:07,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:23:07,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-02 09:23:07,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:23:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:23:07,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:23:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:23:07,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790667894] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:23:07,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:23:07,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-02 09:23:07,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215744531] [2024-02-02 09:23:07,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:23:07,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-02 09:23:07,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:07,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-02 09:23:07,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-02-02 09:23:07,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-02-02 09:23:07,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1385 transitions, 42684 flow. Second operand has 16 states, 16 states have (on average 20.3125) internal successors, (325), 16 states have internal predecessors, (325), 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) [2024-02-02 09:23:07,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:07,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-02-02 09:23:07,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:13,874 INFO L124 PetriNetUnfolderBase]: 6763/13990 cut-off events. [2024-02-02 09:23:13,875 INFO L125 PetriNetUnfolderBase]: For 558480/558480 co-relation queries the response was YES. [2024-02-02 09:23:13,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128151 conditions, 13990 events. 6763/13990 cut-off events. For 558480/558480 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 126421 event pairs, 378 based on Foata normal form. 20/14007 useless extension candidates. Maximal degree in co-relation 127984. Up to 2748 conditions per place. [2024-02-02 09:23:14,190 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 693 selfloop transitions, 1133 changer transitions 7/1840 dead transitions. [2024-02-02 09:23:14,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1840 transitions, 57451 flow [2024-02-02 09:23:14,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-02 09:23:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-02 09:23:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 704 transitions. [2024-02-02 09:23:14,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224580017683466 [2024-02-02 09:23:14,192 INFO L175 Difference]: Start difference. First operand has 356 places, 1385 transitions, 42684 flow. Second operand 29 states and 704 transitions. [2024-02-02 09:23:14,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1840 transitions, 57451 flow [2024-02-02 09:23:18,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1840 transitions, 55820 flow, removed 326 selfloop flow, removed 7 redundant places. [2024-02-02 09:23:18,759 INFO L231 Difference]: Finished difference. Result has 389 places, 1582 transitions, 52711 flow [2024-02-02 09:23:18,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=41598, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=955, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=52711, PETRI_PLACES=389, PETRI_TRANSITIONS=1582} [2024-02-02 09:23:18,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-02-02 09:23:18,760 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1582 transitions, 52711 flow [2024-02-02 09:23:18,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.3125) internal successors, (325), 16 states have internal predecessors, (325), 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) [2024-02-02 09:23:18,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:18,761 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:18,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-02-02 09:23:18,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:18,978 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:23:18,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1430799104, now seen corresponding path program 17 times [2024-02-02 09:23:18,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:18,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103373296] [2024-02-02 09:23:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:18,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-02 09:23:19,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:19,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103373296] [2024-02-02 09:23:19,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103373296] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:23:19,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410747106] [2024-02-02 09:23:19,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-02 09:23:19,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:19,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:23:19,090 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:23:19,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-02 09:23:19,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-02-02 09:23:19,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:23:19,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-02 09:23:19,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:23:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:23:19,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:23:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:23:19,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410747106] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:23:19,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:23:19,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-02 09:23:19,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394256420] [2024-02-02 09:23:19,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:23:19,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-02 09:23:19,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-02 09:23:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2024-02-02 09:23:19,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-02-02 09:23:19,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1582 transitions, 52711 flow. Second operand has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 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) [2024-02-02 09:23:19,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:19,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-02-02 09:23:19,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:26,531 INFO L124 PetriNetUnfolderBase]: 7271/15029 cut-off events. [2024-02-02 09:23:26,532 INFO L125 PetriNetUnfolderBase]: For 702286/702289 co-relation queries the response was YES. [2024-02-02 09:23:26,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145836 conditions, 15029 events. 7271/15029 cut-off events. For 702286/702289 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 136827 event pairs, 837 based on Foata normal form. 50/15075 useless extension candidates. Maximal degree in co-relation 145659. Up to 3086 conditions per place. [2024-02-02 09:23:26,835 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 745 selfloop transitions, 1114 changer transitions 20/1886 dead transitions. [2024-02-02 09:23:26,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1886 transitions, 65643 flow [2024-02-02 09:23:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-02 09:23:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-02 09:23:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 428 transitions. [2024-02-02 09:23:26,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096866096866097 [2024-02-02 09:23:26,836 INFO L175 Difference]: Start difference. First operand has 389 places, 1582 transitions, 52711 flow. Second operand 18 states and 428 transitions. [2024-02-02 09:23:26,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1886 transitions, 65643 flow [2024-02-02 09:23:34,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1886 transitions, 62872 flow, removed 735 selfloop flow, removed 8 redundant places. [2024-02-02 09:23:34,912 INFO L231 Difference]: Finished difference. Result has 409 places, 1720 transitions, 59708 flow [2024-02-02 09:23:34,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=50240, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=961, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=59708, PETRI_PLACES=409, PETRI_TRANSITIONS=1720} [2024-02-02 09:23:34,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-02-02 09:23:34,914 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1720 transitions, 59708 flow [2024-02-02 09:23:34,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 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) [2024-02-02 09:23:34,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:34,914 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:34,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-02 09:23:35,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:35,126 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-02 09:23:35,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:35,126 INFO L85 PathProgramCache]: Analyzing trace with hash -104537013, now seen corresponding path program 18 times [2024-02-02 09:23:35,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:35,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779708126] [2024-02-02 09:23:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:35,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:23:35,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:35,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779708126] [2024-02-02 09:23:35,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779708126] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:23:35,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364873674] [2024-02-02 09:23:35,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-02 09:23:35,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:35,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:23:35,191 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:23:35,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-02 09:23:35,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-02 09:23:35,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:23:35,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-02 09:23:35,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:23:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:23:35,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:23:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:23:35,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364873674] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:23:35,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:23:35,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-02-02 09:23:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921324110] [2024-02-02 09:23:35,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:23:35,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-02 09:23:35,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-02 09:23:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2024-02-02 09:23:35,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-02-02 09:23:35,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1720 transitions, 59708 flow. Second operand has 15 states, 15 states have (on average 22.2) internal successors, (333), 15 states have internal predecessors, (333), 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) [2024-02-02 09:23:35,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:35,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-02-02 09:23:35,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand