./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy11.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-easy11.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-easy11.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy11.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 09:22:06,104 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 09:22:06,179 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 09:22:06,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 09:22:06,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 09:22:06,212 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 09:22:06,216 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 09:22:06,217 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 09:22:06,218 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 09:22:06,224 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 09:22:06,224 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 09:22:06,224 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 09:22:06,225 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 09:22:06,225 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 09:22:06,225 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 09:22:06,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 09:22:06,226 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 09:22:06,226 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 09:22:06,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 09:22:06,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 09:22:06,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 09:22:06,227 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 09:22:06,227 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 09:22:06,227 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 09:22:06,228 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 09:22:06,228 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 09:22:06,228 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 09:22:06,228 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 09:22:06,229 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 09:22:06,229 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 09:22:06,230 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 09:22:06,231 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 09:22:06,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:22:06,231 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 09:22:06,231 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 09:22:06,232 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 09:22:06,232 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 09:22:06,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 09:22:06,232 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 09:22:06,232 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 09:22:06,233 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 09:22:06,233 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 09:22:06,233 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 09:22:06,234 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 09:22:06,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 09:22:06,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 09:22:06,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 09:22:06,470 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 09:22:06,470 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 09:22:06,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2024-02-02 09:22:07,527 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 09:22:07,701 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 09:22:07,702 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2024-02-02 09:22:07,707 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efcae28c6/b9302200d505430eb885188f0705ef48/FLAGb96cb00ee [2024-02-02 09:22:07,721 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efcae28c6/b9302200d505430eb885188f0705ef48 [2024-02-02 09:22:07,723 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 09:22:07,723 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 09:22:07,724 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy11.wvr.yml/witness.yml [2024-02-02 09:22:07,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 09:22:07,808 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 09:22:07,809 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 09:22:07,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 09:22:07,813 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 09:22:07,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:22:07" (1/2) ... [2024-02-02 09:22:07,814 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8ac918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:07, skipping insertion in model container [2024-02-02 09:22:07,814 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:22:07" (1/2) ... [2024-02-02 09:22:07,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@659c7196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:22:07, skipping insertion in model container [2024-02-02 09:22:07,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:22:07" (2/2) ... [2024-02-02 09:22:07,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8ac918 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:07, skipping insertion in model container [2024-02-02 09:22:07,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:22:07" (2/2) ... [2024-02-02 09:22:07,817 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 09:22:07,834 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 09:22:07,834 INFO L101 nessWitnessExtractor]: Location invariant before [L73-L73] Y == 0 [2024-02-02 09:22:07,835 INFO L101 nessWitnessExtractor]: Location invariant before [L44-L44] (x <= 9999) && ((unsigned long )_argptr == 0UL) [2024-02-02 09:22:07,835 INFO L101 nessWitnessExtractor]: Location invariant before [L22-L25] ((((((0LL - (long long )X) + (long long )Y >= 0LL) && ((long long )X + (long long )Y >= 0LL)) && ((0LL - (long long )X) - (long long )Y >= 0LL)) && ((long long )X - (long long )Y >= 0LL)) && (X == 0)) && (Y == 0) [2024-02-02 09:22:07,835 INFO L101 nessWitnessExtractor]: Location invariant before [L63-L63] ((10000 <= x) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-02 09:22:07,835 INFO L101 nessWitnessExtractor]: Location invariant before [L55-L55] (unsigned long )_argptr == 0UL [2024-02-02 09:22:07,836 INFO L101 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-02-02 09:22:07,836 INFO L101 nessWitnessExtractor]: Location invariant before [L48-L48] (((10000 <= Y) && (10000 <= x)) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-02 09:22:07,836 INFO L101 nessWitnessExtractor]: Location invariant before [L50-L50] ((10000 <= x) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-02 09:22:07,837 INFO L101 nessWitnessExtractor]: Location invariant before [L69-L69] ((((((0LL - (long long )X) + (long long )Y >= 0LL) && ((long long )X + (long long )Y >= 0LL)) && ((0LL - (long long )X) - (long long )Y >= 0LL)) && ((long long )X - (long long )Y >= 0LL)) && (X == 0)) && (Y == 0) [2024-02-02 09:22:07,837 INFO L101 nessWitnessExtractor]: Location invariant before [L59-L59] ((10000 <= x) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-02 09:22:07,837 INFO L101 nessWitnessExtractor]: Location invariant before [L47-L47] (((0 <= Y) && (10000 <= x)) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-02 09:22:07,837 INFO L101 nessWitnessExtractor]: Location invariant before [L70-L70] Y == 0 [2024-02-02 09:22:07,837 INFO L101 nessWitnessExtractor]: Location invariant before [L57-L57] (x <= 9999) && ((unsigned long )_argptr == 0UL) [2024-02-02 09:22:07,837 INFO L101 nessWitnessExtractor]: Location invariant before [L61-L61] (((10000 <= Y) && (10000 <= x)) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-02 09:22:07,837 INFO L101 nessWitnessExtractor]: Location invariant before [L46-L46] ((10000 <= x) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-02 09:22:07,838 INFO L101 nessWitnessExtractor]: Loop invariant at [L43-L45] (unsigned long )_argptr == 0UL [2024-02-02 09:22:07,838 INFO L101 nessWitnessExtractor]: Loop invariant at [L56-L58] (unsigned long )_argptr == 0UL [2024-02-02 09:22:07,838 INFO L101 nessWitnessExtractor]: Location invariant before [L60-L60] (((0 <= Y) && (10000 <= x)) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-02 09:22:07,861 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-02 09:22:08,003 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-easy11.wvr.c[2031,2044] [2024-02-02 09:22:08,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:22:08,024 INFO L202 MainTranslator]: Completed pre-run [2024-02-02 09:22:08,037 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 Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 09:22:08,076 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-easy11.wvr.c[2031,2044] [2024-02-02 09:22:08,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:22:08,087 INFO L206 MainTranslator]: Completed translation [2024-02-02 09:22:08,088 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08 WrapperNode [2024-02-02 09:22:08,088 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 09:22:08,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 09:22:08,089 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 09:22:08,089 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 09:22:08,093 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,099 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,112 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2024-02-02 09:22:08,112 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 09:22:08,113 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 09:22:08,113 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 09:22:08,113 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 09:22:08,122 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,132 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,150 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 09:22:08,151 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,151 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,166 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,169 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,170 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,170 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,172 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 09:22:08,173 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 09:22:08,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 09:22:08,173 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 09:22:08,173 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (1/1) ... [2024-02-02 09:22:08,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:22:08,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:08,199 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 09:22:08,206 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 09:22:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 09:22:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-02 09:22:08,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-02 09:22:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-02 09:22:08,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-02 09:22:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 09:22:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 09:22:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 09:22:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 09:22:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 09:22:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 09:22:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 09:22:08,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-02 09:22:08,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-02 09:22:08,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 09:22:08,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 09:22:08,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-02 09:22:08,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-02 09:22:08,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-02 09:22:08,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 09:22:08,237 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 09:22:08,334 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 09:22:08,337 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 09:22:08,521 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 09:22:08,521 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 09:22:08,633 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 09:22:08,641 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-02 09:22:08,642 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:22:08 BoogieIcfgContainer [2024-02-02 09:22:08,643 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 09:22:08,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 09:22:08,646 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 09:22:08,649 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 09:22:08,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 09:22:07" (1/4) ... [2024-02-02 09:22:08,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ec9575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:22:08, skipping insertion in model container [2024-02-02 09:22:08,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:22:07" (2/4) ... [2024-02-02 09:22:08,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ec9575 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:22:08, skipping insertion in model container [2024-02-02 09:22:08,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:22:08" (3/4) ... [2024-02-02 09:22:08,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ec9575 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:22:08, skipping insertion in model container [2024-02-02 09:22:08,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:22:08" (4/4) ... [2024-02-02 09:22:08,651 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2024-02-02 09:22:08,677 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 09:22:08,677 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-02-02 09:22:08,677 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 09:22:08,738 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-02 09:22:08,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 55 transitions, 124 flow [2024-02-02 09:22:08,803 INFO L124 PetriNetUnfolderBase]: 2/53 cut-off events. [2024-02-02 09:22:08,803 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:22:08,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 53 events. 2/53 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 114 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-02-02 09:22:08,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 55 transitions, 124 flow [2024-02-02 09:22:08,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 52 transitions, 116 flow [2024-02-02 09:22:08,823 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:22:08,828 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;@411b606e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:22:08,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-02-02 09:22:08,833 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:22:08,833 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 09:22:08,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:22:08,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:08,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 09:22:08,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:08,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:08,838 INFO L85 PathProgramCache]: Analyzing trace with hash 8853, now seen corresponding path program 1 times [2024-02-02 09:22:08,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:08,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37173617] [2024-02-02 09:22:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:08,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:09,100 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 09:22:09,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37173617] [2024-02-02 09:22:09,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37173617] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:09,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:09,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:22:09,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458978706] [2024-02-02 09:22:09,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:09,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:22:09,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:09,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:22:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:22:09,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:09,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:09,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:09,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:09,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:09,320 INFO L124 PetriNetUnfolderBase]: 205/517 cut-off events. [2024-02-02 09:22:09,320 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-02 09:22:09,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 517 events. 205/517 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2992 event pairs, 189 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 811. Up to 357 conditions per place. [2024-02-02 09:22:09,328 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 26 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-02-02 09:22:09,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 166 flow [2024-02-02 09:22:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:22:09,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:22:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-02-02 09:22:09,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-02-02 09:22:09,341 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 116 flow. Second operand 3 states and 100 transitions. [2024-02-02 09:22:09,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 166 flow [2024-02-02 09:22:09,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:09,350 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 106 flow [2024-02-02 09:22:09,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-02-02 09:22:09,355 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2024-02-02 09:22:09,355 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 106 flow [2024-02-02 09:22:09,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:09,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:09,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-02 09:22:09,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 09:22:09,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:09,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:09,356 INFO L85 PathProgramCache]: Analyzing trace with hash 274752, now seen corresponding path program 1 times [2024-02-02 09:22:09,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:09,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494645641] [2024-02-02 09:22:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:09,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:09,391 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 09:22:09,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:09,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494645641] [2024-02-02 09:22:09,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494645641] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:09,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:09,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:22:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117972528] [2024-02-02 09:22:09,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:09,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:22:09,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:09,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:22:09,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:22:09,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-02 09:22:09,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:09,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:09,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-02 09:22:09,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:09,472 INFO L124 PetriNetUnfolderBase]: 203/513 cut-off events. [2024-02-02 09:22:09,473 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:22:09,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 513 events. 203/513 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2945 event pairs, 103 based on Foata normal form. 0/430 useless extension candidates. Maximal degree in co-relation 873. Up to 183 conditions per place. [2024-02-02 09:22:09,476 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 38 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-02-02 09:22:09,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 215 flow [2024-02-02 09:22:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:22:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:22:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-02-02 09:22:09,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696969696969697 [2024-02-02 09:22:09,477 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 106 flow. Second operand 3 states and 115 transitions. [2024-02-02 09:22:09,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 215 flow [2024-02-02 09:22:09,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 211 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:09,479 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 115 flow [2024-02-02 09:22:09,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-02-02 09:22:09,480 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -6 predicate places. [2024-02-02 09:22:09,480 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 115 flow [2024-02-02 09:22:09,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:09,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:09,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:09,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 09:22:09,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:09,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:09,481 INFO L85 PathProgramCache]: Analyzing trace with hash 344827399, now seen corresponding path program 1 times [2024-02-02 09:22:09,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:09,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259977617] [2024-02-02 09:22:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:09,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:09,574 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 09:22:09,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:09,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259977617] [2024-02-02 09:22:09,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259977617] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:09,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:09,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:09,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769456497] [2024-02-02 09:22:09,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:09,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:09,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:09,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:09,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:09,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:09,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:09,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:09,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:09,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:09,723 INFO L124 PetriNetUnfolderBase]: 233/522 cut-off events. [2024-02-02 09:22:09,724 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-02-02 09:22:09,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 522 events. 233/522 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2744 event pairs, 73 based on Foata normal form. 36/518 useless extension candidates. Maximal degree in co-relation 517. Up to 358 conditions per place. [2024-02-02 09:22:09,728 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 36 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-02-02 09:22:09,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 209 flow [2024-02-02 09:22:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:22:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:22:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-02-02 09:22:09,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954545454545455 [2024-02-02 09:22:09,734 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 115 flow. Second operand 4 states and 131 transitions. [2024-02-02 09:22:09,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 209 flow [2024-02-02 09:22:09,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:22:09,737 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 110 flow [2024-02-02 09:22:09,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2024-02-02 09:22:09,738 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2024-02-02 09:22:09,738 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 110 flow [2024-02-02 09:22:09,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:09,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:09,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:09,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 09:22:09,739 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:09,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash 665830795, now seen corresponding path program 1 times [2024-02-02 09:22:09,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:09,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428416156] [2024-02-02 09:22:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:09,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:09,828 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 09:22:09,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:09,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428416156] [2024-02-02 09:22:09,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428416156] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:09,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:09,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:09,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320603315] [2024-02-02 09:22:09,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:09,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:09,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:09,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:09,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:09,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:09,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:09,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:09,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:09,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:09,944 INFO L124 PetriNetUnfolderBase]: 209/496 cut-off events. [2024-02-02 09:22:09,945 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-02-02 09:22:09,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 496 events. 209/496 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2671 event pairs, 7 based on Foata normal form. 36/511 useless extension candidates. Maximal degree in co-relation 784. Up to 296 conditions per place. [2024-02-02 09:22:09,948 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 43 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-02 09:22:09,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 237 flow [2024-02-02 09:22:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:22:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:22:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-02-02 09:22:09,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-02-02 09:22:09,950 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 110 flow. Second operand 4 states and 138 transitions. [2024-02-02 09:22:09,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 237 flow [2024-02-02 09:22:09,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:09,952 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 105 flow [2024-02-02 09:22:09,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-02-02 09:22:09,953 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2024-02-02 09:22:09,953 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 105 flow [2024-02-02 09:22:09,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:09,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:09,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:09,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 09:22:09,954 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:09,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:09,954 INFO L85 PathProgramCache]: Analyzing trace with hash -808415593, now seen corresponding path program 1 times [2024-02-02 09:22:09,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:09,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795346141] [2024-02-02 09:22:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:09,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:10,022 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 09:22:10,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:10,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795346141] [2024-02-02 09:22:10,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795346141] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:10,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:10,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:10,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61176432] [2024-02-02 09:22:10,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:10,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:10,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:10,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:10,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-02-02 09:22:10,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:10,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:10,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-02-02 09:22:10,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:10,137 INFO L124 PetriNetUnfolderBase]: 331/618 cut-off events. [2024-02-02 09:22:10,137 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-02-02 09:22:10,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1325 conditions, 618 events. 331/618 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3052 event pairs, 39 based on Foata normal form. 0/558 useless extension candidates. Maximal degree in co-relation 1187. Up to 386 conditions per place. [2024-02-02 09:22:10,140 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 50 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2024-02-02 09:22:10,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 271 flow [2024-02-02 09:22:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:22:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:22:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-02-02 09:22:10,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-02-02 09:22:10,141 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 105 flow. Second operand 4 states and 117 transitions. [2024-02-02 09:22:10,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 271 flow [2024-02-02 09:22:10,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 63 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:10,143 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 110 flow [2024-02-02 09:22:10,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-02-02 09:22:10,144 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2024-02-02 09:22:10,144 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 110 flow [2024-02-02 09:22:10,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:10,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:10,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:10,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 09:22:10,145 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:10,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash -808415560, now seen corresponding path program 1 times [2024-02-02 09:22:10,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:10,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201718123] [2024-02-02 09:22:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:10,185 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 09:22:10,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:10,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201718123] [2024-02-02 09:22:10,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201718123] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:10,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:10,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:10,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127358774] [2024-02-02 09:22:10,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:10,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:10,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:10,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:10,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:10,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-02-02 09:22:10,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:10,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:10,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-02-02 09:22:10,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:10,288 INFO L124 PetriNetUnfolderBase]: 283/534 cut-off events. [2024-02-02 09:22:10,288 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-02-02 09:22:10,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 534 events. 283/534 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2553 event pairs, 39 based on Foata normal form. 36/564 useless extension candidates. Maximal degree in co-relation 1051. Up to 242 conditions per place. [2024-02-02 09:22:10,291 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 50 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-02-02 09:22:10,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 254 flow [2024-02-02 09:22:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:22:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:22:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-02-02 09:22:10,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-02-02 09:22:10,292 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 110 flow. Second operand 4 states and 116 transitions. [2024-02-02 09:22:10,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 254 flow [2024-02-02 09:22:10,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 248 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-02 09:22:10,295 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 100 flow [2024-02-02 09:22:10,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-02-02 09:22:10,297 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2024-02-02 09:22:10,297 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 100 flow [2024-02-02 09:22:10,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:10,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:10,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:10,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 09:22:10,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:10,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash 708921741, now seen corresponding path program 1 times [2024-02-02 09:22:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:10,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578870710] [2024-02-02 09:22:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:10,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:10,350 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 09:22:10,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:10,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578870710] [2024-02-02 09:22:10,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578870710] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:10,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:10,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:10,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976924119] [2024-02-02 09:22:10,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:10,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:10,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:22:10,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-02-02 09:22:10,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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 09:22:10,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:10,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-02-02 09:22:10,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:10,460 INFO L124 PetriNetUnfolderBase]: 259/492 cut-off events. [2024-02-02 09:22:10,460 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-02-02 09:22:10,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 492 events. 259/492 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2267 event pairs, 39 based on Foata normal form. 18/504 useless extension candidates. Maximal degree in co-relation 944. Up to 200 conditions per place. [2024-02-02 09:22:10,462 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 48 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-02-02 09:22:10,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 248 flow [2024-02-02 09:22:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:22:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:22:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-02-02 09:22:10,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-02-02 09:22:10,463 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 100 flow. Second operand 5 states and 130 transitions. [2024-02-02 09:22:10,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 248 flow [2024-02-02 09:22:10,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 245 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:10,465 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 101 flow [2024-02-02 09:22:10,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-02-02 09:22:10,465 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2024-02-02 09:22:10,466 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 101 flow [2024-02-02 09:22:10,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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 09:22:10,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:10,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:10,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-02 09:22:10,466 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:10,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:10,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1606571621, now seen corresponding path program 1 times [2024-02-02 09:22:10,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:10,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056930873] [2024-02-02 09:22:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:10,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:10,499 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 09:22:10,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:10,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056930873] [2024-02-02 09:22:10,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056930873] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:10,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:10,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:10,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119660399] [2024-02-02 09:22:10,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:10,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:10,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:10,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:10,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-02-02 09:22:10,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 09:22:10,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:10,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-02-02 09:22:10,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:10,615 INFO L124 PetriNetUnfolderBase]: 288/523 cut-off events. [2024-02-02 09:22:10,616 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-02-02 09:22:10,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1223 conditions, 523 events. 288/523 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2317 event pairs, 39 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 1035. Up to 314 conditions per place. [2024-02-02 09:22:10,618 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 47 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-02-02 09:22:10,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 261 flow [2024-02-02 09:22:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:22:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:22:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-02-02 09:22:10,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-02-02 09:22:10,619 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 101 flow. Second operand 4 states and 114 transitions. [2024-02-02 09:22:10,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 261 flow [2024-02-02 09:22:10,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-02 09:22:10,621 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 104 flow [2024-02-02 09:22:10,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-02-02 09:22:10,623 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2024-02-02 09:22:10,623 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 104 flow [2024-02-02 09:22:10,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 09:22:10,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:10,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:10,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-02 09:22:10,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:10,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1606571654, now seen corresponding path program 1 times [2024-02-02 09:22:10,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:10,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403320147] [2024-02-02 09:22:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:10,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:10,675 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 09:22:10,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:10,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403320147] [2024-02-02 09:22:10,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403320147] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:10,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:10,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:10,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258271302] [2024-02-02 09:22:10,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:10,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:22:10,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:10,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:22:10,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:22:10,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-02-02 09:22:10,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 09:22:10,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:10,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-02-02 09:22:10,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:10,770 INFO L124 PetriNetUnfolderBase]: 246/449 cut-off events. [2024-02-02 09:22:10,770 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-02-02 09:22:10,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 449 events. 246/449 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1880 event pairs, 39 based on Foata normal form. 32/476 useless extension candidates. Maximal degree in co-relation 909. Up to 187 conditions per place. [2024-02-02 09:22:10,772 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 47 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2024-02-02 09:22:10,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-02-02 09:22:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:22:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:22:10,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-02-02 09:22:10,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-02-02 09:22:10,774 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 104 flow. Second operand 4 states and 113 transitions. [2024-02-02 09:22:10,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-02-02 09:22:10,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 236 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-02 09:22:10,776 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 94 flow [2024-02-02 09:22:10,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-02-02 09:22:10,777 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -13 predicate places. [2024-02-02 09:22:10,778 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 94 flow [2024-02-02 09:22:10,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 09:22:10,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:10,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:10,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 09:22:10,778 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:10,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1735885935, now seen corresponding path program 1 times [2024-02-02 09:22:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:10,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122211290] [2024-02-02 09:22:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:10,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:10,843 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 09:22:10,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:10,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122211290] [2024-02-02 09:22:10,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122211290] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:10,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:10,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:22:10,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458472843] [2024-02-02 09:22:10,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:10,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:22:10,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-02-02 09:22:10,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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 09:22:10,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:10,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-02-02 09:22:10,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:10,944 INFO L124 PetriNetUnfolderBase]: 225/412 cut-off events. [2024-02-02 09:22:10,944 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-02-02 09:22:10,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 412 events. 225/412 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1695 event pairs, 39 based on Foata normal form. 16/423 useless extension candidates. Maximal degree in co-relation 825. Up to 164 conditions per place. [2024-02-02 09:22:10,947 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 45 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2024-02-02 09:22:10,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 236 flow [2024-02-02 09:22:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:22:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:22:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-02-02 09:22:10,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618181818181818 [2024-02-02 09:22:10,949 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 94 flow. Second operand 5 states and 127 transitions. [2024-02-02 09:22:10,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 236 flow [2024-02-02 09:22:10,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:10,952 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 95 flow [2024-02-02 09:22:10,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=95, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2024-02-02 09:22:10,954 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -12 predicate places. [2024-02-02 09:22:10,956 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 95 flow [2024-02-02 09:22:10,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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 09:22:10,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:10,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:10,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-02 09:22:10,956 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:10,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:10,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1838267602, now seen corresponding path program 1 times [2024-02-02 09:22:10,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:10,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982220016] [2024-02-02 09:22:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:10,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:11,079 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 09:22:11,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:11,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982220016] [2024-02-02 09:22:11,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982220016] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:11,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:11,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:11,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944061957] [2024-02-02 09:22:11,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:11,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:11,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:11,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:11,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-02 09:22:11,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 95 flow. Second operand has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:11,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:11,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-02 09:22:11,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:11,434 INFO L124 PetriNetUnfolderBase]: 242/502 cut-off events. [2024-02-02 09:22:11,434 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-02-02 09:22:11,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 502 events. 242/502 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2293 event pairs, 27 based on Foata normal form. 1/503 useless extension candidates. Maximal degree in co-relation 971. Up to 111 conditions per place. [2024-02-02 09:22:11,437 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 51 selfloop transitions, 10 changer transitions 13/81 dead transitions. [2024-02-02 09:22:11,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 364 flow [2024-02-02 09:22:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 291 transitions. [2024-02-02 09:22:11,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878787878787879 [2024-02-02 09:22:11,438 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 95 flow. Second operand 9 states and 291 transitions. [2024-02-02 09:22:11,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 364 flow [2024-02-02 09:22:11,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 81 transitions, 352 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-02 09:22:11,440 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 141 flow [2024-02-02 09:22:11,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=141, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2024-02-02 09:22:11,440 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2024-02-02 09:22:11,441 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 141 flow [2024-02-02 09:22:11,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:11,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:11,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:11,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-02 09:22:11,441 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:11,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:11,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1474843344, now seen corresponding path program 2 times [2024-02-02 09:22:11,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:11,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600894727] [2024-02-02 09:22:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:11,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:11,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:11,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600894727] [2024-02-02 09:22:11,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600894727] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:11,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:11,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:11,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306687978] [2024-02-02 09:22:11,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:11,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:11,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:11,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:11,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:11,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:11,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 141 flow. Second operand has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:11,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:11,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:11,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:11,896 INFO L124 PetriNetUnfolderBase]: 279/541 cut-off events. [2024-02-02 09:22:11,896 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-02-02 09:22:11,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412 conditions, 541 events. 279/541 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2385 event pairs, 45 based on Foata normal form. 1/538 useless extension candidates. Maximal degree in co-relation 1400. Up to 217 conditions per place. [2024-02-02 09:22:11,899 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 52 selfloop transitions, 13 changer transitions 13/84 dead transitions. [2024-02-02 09:22:11,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 439 flow [2024-02-02 09:22:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 284 transitions. [2024-02-02 09:22:11,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737373737373738 [2024-02-02 09:22:11,900 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 141 flow. Second operand 9 states and 284 transitions. [2024-02-02 09:22:11,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 439 flow [2024-02-02 09:22:11,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 84 transitions, 417 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:11,903 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 204 flow [2024-02-02 09:22:11,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=204, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2024-02-02 09:22:11,904 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2024-02-02 09:22:11,904 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 204 flow [2024-02-02 09:22:11,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:11,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:11,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:11,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-02 09:22:11,905 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:11,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1864080552, now seen corresponding path program 3 times [2024-02-02 09:22:11,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:11,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332686268] [2024-02-02 09:22:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:11,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:12,035 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 09:22:12,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:12,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332686268] [2024-02-02 09:22:12,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332686268] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:12,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:12,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:12,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330605400] [2024-02-02 09:22:12,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:12,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:12,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:12,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:12,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:12,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 204 flow. Second operand has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:12,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:12,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:12,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:12,375 INFO L124 PetriNetUnfolderBase]: 293/571 cut-off events. [2024-02-02 09:22:12,375 INFO L125 PetriNetUnfolderBase]: For 437/441 co-relation queries the response was YES. [2024-02-02 09:22:12,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 571 events. 293/571 cut-off events. For 437/441 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2582 event pairs, 43 based on Foata normal form. 1/549 useless extension candidates. Maximal degree in co-relation 1626. Up to 209 conditions per place. [2024-02-02 09:22:12,378 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 57 selfloop transitions, 18 changer transitions 11/92 dead transitions. [2024-02-02 09:22:12,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 92 transitions, 556 flow [2024-02-02 09:22:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 286 transitions. [2024-02-02 09:22:12,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-02-02 09:22:12,379 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 204 flow. Second operand 9 states and 286 transitions. [2024-02-02 09:22:12,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 92 transitions, 556 flow [2024-02-02 09:22:12,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 524 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-02-02 09:22:12,382 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 285 flow [2024-02-02 09:22:12,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=285, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2024-02-02 09:22:12,382 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2024-02-02 09:22:12,382 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 285 flow [2024-02-02 09:22:12,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:12,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:12,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:12,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-02 09:22:12,383 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:12,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:12,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1230787712, now seen corresponding path program 4 times [2024-02-02 09:22:12,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:12,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930190705] [2024-02-02 09:22:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:12,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:12,483 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 09:22:12,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:12,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930190705] [2024-02-02 09:22:12,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930190705] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:12,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:12,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:12,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968748759] [2024-02-02 09:22:12,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:12,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:12,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:12,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:12,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:12,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:12,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 285 flow. Second operand has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:12,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:12,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:12,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:12,840 INFO L124 PetriNetUnfolderBase]: 379/715 cut-off events. [2024-02-02 09:22:12,840 INFO L125 PetriNetUnfolderBase]: For 863/863 co-relation queries the response was YES. [2024-02-02 09:22:12,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 715 events. 379/715 cut-off events. For 863/863 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3414 event pairs, 63 based on Foata normal form. 1/712 useless extension candidates. Maximal degree in co-relation 2251. Up to 255 conditions per place. [2024-02-02 09:22:12,843 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 52 selfloop transitions, 29 changer transitions 13/100 dead transitions. [2024-02-02 09:22:12,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 675 flow [2024-02-02 09:22:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 287 transitions. [2024-02-02 09:22:12,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797979797979798 [2024-02-02 09:22:12,844 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 285 flow. Second operand 9 states and 287 transitions. [2024-02-02 09:22:12,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 675 flow [2024-02-02 09:22:12,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 627 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-02-02 09:22:12,847 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 435 flow [2024-02-02 09:22:12,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=435, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2024-02-02 09:22:12,848 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-02-02 09:22:12,848 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 435 flow [2024-02-02 09:22:12,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:12,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:12,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:12,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-02 09:22:12,848 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:12,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:12,849 INFO L85 PathProgramCache]: Analyzing trace with hash -937437992, now seen corresponding path program 5 times [2024-02-02 09:22:12,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:12,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631308029] [2024-02-02 09:22:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:12,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:12,979 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 09:22:12,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631308029] [2024-02-02 09:22:12,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631308029] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:12,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:12,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:12,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791539283] [2024-02-02 09:22:12,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:12,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:12,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:12,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:13,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:13,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 435 flow. Second operand has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:13,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:13,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:13,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:13,327 INFO L124 PetriNetUnfolderBase]: 448/820 cut-off events. [2024-02-02 09:22:13,327 INFO L125 PetriNetUnfolderBase]: For 1625/1629 co-relation queries the response was YES. [2024-02-02 09:22:13,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2998 conditions, 820 events. 448/820 cut-off events. For 1625/1629 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3891 event pairs, 81 based on Foata normal form. 1/821 useless extension candidates. Maximal degree in co-relation 2977. Up to 285 conditions per place. [2024-02-02 09:22:13,332 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 61 selfloop transitions, 30 changer transitions 14/111 dead transitions. [2024-02-02 09:22:13,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 868 flow [2024-02-02 09:22:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 288 transitions. [2024-02-02 09:22:13,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-02-02 09:22:13,333 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 435 flow. Second operand 9 states and 288 transitions. [2024-02-02 09:22:13,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 868 flow [2024-02-02 09:22:13,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 111 transitions, 827 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-02-02 09:22:13,338 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 571 flow [2024-02-02 09:22:13,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=571, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2024-02-02 09:22:13,339 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2024-02-02 09:22:13,339 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 571 flow [2024-02-02 09:22:13,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:13,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:13,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:13,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-02 09:22:13,339 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:13,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1521909664, now seen corresponding path program 6 times [2024-02-02 09:22:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:13,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361720822] [2024-02-02 09:22:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:13,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:13,446 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 09:22:13,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:13,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361720822] [2024-02-02 09:22:13,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361720822] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:13,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:13,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:13,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940781445] [2024-02-02 09:22:13,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:13,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:13,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:13,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:13,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:13,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-02 09:22:13,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 571 flow. Second operand has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:13,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:13,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-02 09:22:13,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:13,813 INFO L124 PetriNetUnfolderBase]: 377/733 cut-off events. [2024-02-02 09:22:13,813 INFO L125 PetriNetUnfolderBase]: For 2269/2277 co-relation queries the response was YES. [2024-02-02 09:22:13,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2846 conditions, 733 events. 377/733 cut-off events. For 2269/2277 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3626 event pairs, 69 based on Foata normal form. 5/738 useless extension candidates. Maximal degree in co-relation 2822. Up to 243 conditions per place. [2024-02-02 09:22:13,818 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 61 selfloop transitions, 30 changer transitions 13/111 dead transitions. [2024-02-02 09:22:13,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 111 transitions, 937 flow [2024-02-02 09:22:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 296 transitions. [2024-02-02 09:22:13,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.597979797979798 [2024-02-02 09:22:13,819 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 571 flow. Second operand 9 states and 296 transitions. [2024-02-02 09:22:13,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 111 transitions, 937 flow [2024-02-02 09:22:13,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 884 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-02-02 09:22:13,824 INFO L231 Difference]: Finished difference. Result has 82 places, 72 transitions, 601 flow [2024-02-02 09:22:13,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=601, PETRI_PLACES=82, PETRI_TRANSITIONS=72} [2024-02-02 09:22:13,825 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-02-02 09:22:13,825 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 72 transitions, 601 flow [2024-02-02 09:22:13,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:13,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:13,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:13,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-02 09:22:13,825 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:13,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:13,825 INFO L85 PathProgramCache]: Analyzing trace with hash 614394076, now seen corresponding path program 7 times [2024-02-02 09:22:13,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:13,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110868600] [2024-02-02 09:22:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:13,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:13,941 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 09:22:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110868600] [2024-02-02 09:22:13,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110868600] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:13,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:13,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:13,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515445757] [2024-02-02 09:22:13,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:13,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:13,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:13,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:13,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:14,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:14,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 72 transitions, 601 flow. Second operand has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:14,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:14,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:14,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:14,316 INFO L124 PetriNetUnfolderBase]: 444/832 cut-off events. [2024-02-02 09:22:14,317 INFO L125 PetriNetUnfolderBase]: For 3160/3180 co-relation queries the response was YES. [2024-02-02 09:22:14,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3349 conditions, 832 events. 444/832 cut-off events. For 3160/3180 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4136 event pairs, 67 based on Foata normal form. 21/850 useless extension candidates. Maximal degree in co-relation 3324. Up to 311 conditions per place. [2024-02-02 09:22:14,321 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 59 selfloop transitions, 33 changer transitions 13/111 dead transitions. [2024-02-02 09:22:14,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 111 transitions, 995 flow [2024-02-02 09:22:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 287 transitions. [2024-02-02 09:22:14,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797979797979798 [2024-02-02 09:22:14,322 INFO L175 Difference]: Start difference. First operand has 82 places, 72 transitions, 601 flow. Second operand 9 states and 287 transitions. [2024-02-02 09:22:14,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 111 transitions, 995 flow [2024-02-02 09:22:14,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 921 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-02-02 09:22:14,328 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 647 flow [2024-02-02 09:22:14,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=647, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2024-02-02 09:22:14,329 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 27 predicate places. [2024-02-02 09:22:14,329 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 647 flow [2024-02-02 09:22:14,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:14,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:14,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:14,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-02 09:22:14,329 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:14,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:14,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2013627138, now seen corresponding path program 8 times [2024-02-02 09:22:14,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:14,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933664917] [2024-02-02 09:22:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:14,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:14,414 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 09:22:14,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:14,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933664917] [2024-02-02 09:22:14,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933664917] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:14,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:14,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:14,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376894225] [2024-02-02 09:22:14,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:14,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:14,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:14,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-02 09:22:14,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 647 flow. Second operand has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:14,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:14,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-02 09:22:14,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:14,772 INFO L124 PetriNetUnfolderBase]: 401/790 cut-off events. [2024-02-02 09:22:14,773 INFO L125 PetriNetUnfolderBase]: For 3364/3398 co-relation queries the response was YES. [2024-02-02 09:22:14,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3266 conditions, 790 events. 401/790 cut-off events. For 3364/3398 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4077 event pairs, 51 based on Foata normal form. 27/814 useless extension candidates. Maximal degree in co-relation 3240. Up to 258 conditions per place. [2024-02-02 09:22:14,778 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 58 selfloop transitions, 32 changer transitions 11/109 dead transitions. [2024-02-02 09:22:14,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 109 transitions, 988 flow [2024-02-02 09:22:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 290 transitions. [2024-02-02 09:22:14,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-02-02 09:22:14,780 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 647 flow. Second operand 9 states and 290 transitions. [2024-02-02 09:22:14,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 109 transitions, 988 flow [2024-02-02 09:22:14,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 109 transitions, 932 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-02 09:22:14,787 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 679 flow [2024-02-02 09:22:14,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=679, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2024-02-02 09:22:14,787 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-02-02 09:22:14,787 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 679 flow [2024-02-02 09:22:14,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:14,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:14,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:14,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-02 09:22:14,788 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:14,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash 775573624, now seen corresponding path program 9 times [2024-02-02 09:22:14,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:14,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321745455] [2024-02-02 09:22:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:14,891 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 09:22:14,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:14,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321745455] [2024-02-02 09:22:14,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321745455] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:14,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:14,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:14,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597236249] [2024-02-02 09:22:14,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:14,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:14,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:15,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:15,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 679 flow. Second operand has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:15,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:15,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:15,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:15,248 INFO L124 PetriNetUnfolderBase]: 480/892 cut-off events. [2024-02-02 09:22:15,248 INFO L125 PetriNetUnfolderBase]: For 3743/3781 co-relation queries the response was YES. [2024-02-02 09:22:15,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3681 conditions, 892 events. 480/892 cut-off events. For 3743/3781 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4466 event pairs, 93 based on Foata normal form. 21/909 useless extension candidates. Maximal degree in co-relation 3654. Up to 287 conditions per place. [2024-02-02 09:22:15,254 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 62 selfloop transitions, 29 changer transitions 16/113 dead transitions. [2024-02-02 09:22:15,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 113 transitions, 1057 flow [2024-02-02 09:22:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 284 transitions. [2024-02-02 09:22:15,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737373737373738 [2024-02-02 09:22:15,255 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 679 flow. Second operand 9 states and 284 transitions. [2024-02-02 09:22:15,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 113 transitions, 1057 flow [2024-02-02 09:22:15,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 113 transitions, 979 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-02-02 09:22:15,263 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 661 flow [2024-02-02 09:22:15,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=661, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2024-02-02 09:22:15,263 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-02-02 09:22:15,263 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 661 flow [2024-02-02 09:22:15,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 25.666666666666668) internal successors, (231), 9 states have internal predecessors, (231), 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 09:22:15,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:15,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:15,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-02 09:22:15,264 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:15,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1165854716, now seen corresponding path program 10 times [2024-02-02 09:22:15,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:15,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075773894] [2024-02-02 09:22:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:15,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:15,369 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 09:22:15,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:15,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075773894] [2024-02-02 09:22:15,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075773894] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:15,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:15,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:15,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493896165] [2024-02-02 09:22:15,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:15,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:15,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:15,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:15,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:15,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-02 09:22:15,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 76 transitions, 661 flow. Second operand has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:15,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:15,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-02 09:22:15,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:15,765 INFO L124 PetriNetUnfolderBase]: 411/818 cut-off events. [2024-02-02 09:22:15,765 INFO L125 PetriNetUnfolderBase]: For 3742/3782 co-relation queries the response was YES. [2024-02-02 09:22:15,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3388 conditions, 818 events. 411/818 cut-off events. For 3742/3782 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4305 event pairs, 83 based on Foata normal form. 23/837 useless extension candidates. Maximal degree in co-relation 3360. Up to 257 conditions per place. [2024-02-02 09:22:15,770 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 61 selfloop transitions, 29 changer transitions 11/109 dead transitions. [2024-02-02 09:22:15,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 109 transitions, 1009 flow [2024-02-02 09:22:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:15,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 290 transitions. [2024-02-02 09:22:15,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-02-02 09:22:15,771 INFO L175 Difference]: Start difference. First operand has 89 places, 76 transitions, 661 flow. Second operand 9 states and 290 transitions. [2024-02-02 09:22:15,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 109 transitions, 1009 flow [2024-02-02 09:22:15,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 109 transitions, 957 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-02-02 09:22:15,781 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 695 flow [2024-02-02 09:22:15,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=695, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2024-02-02 09:22:15,782 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2024-02-02 09:22:15,782 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 695 flow [2024-02-02 09:22:15,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:15,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:15,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:15,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-02 09:22:15,782 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:15,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash -682127800, now seen corresponding path program 11 times [2024-02-02 09:22:15,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:15,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486078789] [2024-02-02 09:22:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:15,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:15,872 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 09:22:15,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:15,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486078789] [2024-02-02 09:22:15,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486078789] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:15,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:15,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:15,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670144823] [2024-02-02 09:22:15,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:15,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:15,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:15,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:15,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-02 09:22:15,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 695 flow. Second operand has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:15,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:15,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-02 09:22:15,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:16,226 INFO L124 PetriNetUnfolderBase]: 405/817 cut-off events. [2024-02-02 09:22:16,227 INFO L125 PetriNetUnfolderBase]: For 3972/3978 co-relation queries the response was YES. [2024-02-02 09:22:16,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3407 conditions, 817 events. 405/817 cut-off events. For 3972/3978 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4377 event pairs, 69 based on Foata normal form. 3/813 useless extension candidates. Maximal degree in co-relation 3378. Up to 293 conditions per place. [2024-02-02 09:22:16,231 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 62 selfloop transitions, 29 changer transitions 13/112 dead transitions. [2024-02-02 09:22:16,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 112 transitions, 1054 flow [2024-02-02 09:22:16,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 292 transitions. [2024-02-02 09:22:16,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5898989898989899 [2024-02-02 09:22:16,232 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 695 flow. Second operand 9 states and 292 transitions. [2024-02-02 09:22:16,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 112 transitions, 1054 flow [2024-02-02 09:22:16,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 112 transitions, 984 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-02-02 09:22:16,240 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 705 flow [2024-02-02 09:22:16,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=705, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2024-02-02 09:22:16,240 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-02-02 09:22:16,240 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 705 flow [2024-02-02 09:22:16,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:16,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:16,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:16,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-02-02 09:22:16,241 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:16,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:16,241 INFO L85 PathProgramCache]: Analyzing trace with hash 462235856, now seen corresponding path program 12 times [2024-02-02 09:22:16,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:16,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000344344] [2024-02-02 09:22:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:16,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:16,334 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 09:22:16,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:16,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000344344] [2024-02-02 09:22:16,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000344344] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:16,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:16,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-02 09:22:16,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868153365] [2024-02-02 09:22:16,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:16,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-02 09:22:16,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:16,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-02 09:22:16,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-02 09:22:16,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 55 [2024-02-02 09:22:16,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 705 flow. Second operand has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:16,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:16,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 55 [2024-02-02 09:22:16,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:16,686 INFO L124 PetriNetUnfolderBase]: 425/847 cut-off events. [2024-02-02 09:22:16,686 INFO L125 PetriNetUnfolderBase]: For 4545/4585 co-relation queries the response was YES. [2024-02-02 09:22:16,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3582 conditions, 847 events. 425/847 cut-off events. For 4545/4585 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4456 event pairs, 63 based on Foata normal form. 19/862 useless extension candidates. Maximal degree in co-relation 3552. Up to 282 conditions per place. [2024-02-02 09:22:16,707 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 68 selfloop transitions, 23 changer transitions 11/110 dead transitions. [2024-02-02 09:22:16,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 1059 flow [2024-02-02 09:22:16,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:22:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:22:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 283 transitions. [2024-02-02 09:22:16,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5717171717171717 [2024-02-02 09:22:16,708 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 705 flow. Second operand 9 states and 283 transitions. [2024-02-02 09:22:16,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 1059 flow [2024-02-02 09:22:16,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 110 transitions, 989 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-02-02 09:22:16,720 INFO L231 Difference]: Finished difference. Result has 95 places, 79 transitions, 705 flow [2024-02-02 09:22:16,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=705, PETRI_PLACES=95, PETRI_TRANSITIONS=79} [2024-02-02 09:22:16,721 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-02-02 09:22:16,721 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 79 transitions, 705 flow [2024-02-02 09:22:16,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.555555555555557) internal successors, (239), 9 states have internal predecessors, (239), 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 09:22:16,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:16,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:16,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-02-02 09:22:16,721 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:16,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:16,722 INFO L85 PathProgramCache]: Analyzing trace with hash -902580776, now seen corresponding path program 1 times [2024-02-02 09:22:16,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:16,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146219919] [2024-02-02 09:22:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:16,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:16,759 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 09:22:16,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:16,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146219919] [2024-02-02 09:22:16,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146219919] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:16,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836128921] [2024-02-02 09:22:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:16,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:16,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:16,761 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 09:22:16,784 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 09:22:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:16,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-02 09:22:16,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:16,905 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 09:22:16,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:16,945 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 09:22:16,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836128921] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:16,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:16,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-02-02 09:22:16,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315250503] [2024-02-02 09:22:16,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:16,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-02 09:22:16,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:16,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-02 09:22:16,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-02 09:22:17,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:22:17,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 79 transitions, 705 flow. Second operand has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 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 09:22:17,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:17,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:22:17,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:17,349 INFO L124 PetriNetUnfolderBase]: 957/1838 cut-off events. [2024-02-02 09:22:17,349 INFO L125 PetriNetUnfolderBase]: For 7497/7497 co-relation queries the response was YES. [2024-02-02 09:22:17,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7092 conditions, 1838 events. 957/1838 cut-off events. For 7497/7497 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10719 event pairs, 93 based on Foata normal form. 76/1914 useless extension candidates. Maximal degree in co-relation 7046. Up to 331 conditions per place. [2024-02-02 09:22:17,365 INFO L140 encePairwiseOnDemand]: 38/55 looper letters, 156 selfloop transitions, 81 changer transitions 4/246 dead transitions. [2024-02-02 09:22:17,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 246 transitions, 2393 flow [2024-02-02 09:22:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-02 09:22:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-02 09:22:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 438 transitions. [2024-02-02 09:22:17,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125874125874126 [2024-02-02 09:22:17,367 INFO L175 Difference]: Start difference. First operand has 95 places, 79 transitions, 705 flow. Second operand 13 states and 438 transitions. [2024-02-02 09:22:17,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 246 transitions, 2393 flow [2024-02-02 09:22:17,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 246 transitions, 2208 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-02-02 09:22:17,381 INFO L231 Difference]: Finished difference. Result has 105 places, 141 transitions, 1449 flow [2024-02-02 09:22:17,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1449, PETRI_PLACES=105, PETRI_TRANSITIONS=141} [2024-02-02 09:22:17,381 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 48 predicate places. [2024-02-02 09:22:17,381 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 141 transitions, 1449 flow [2024-02-02 09:22:17,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.875) internal successors, (215), 8 states have internal predecessors, (215), 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 09:22:17,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:17,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:17,399 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 09:22:17,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-02-02 09:22:17,595 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:17,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:17,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1789225082, now seen corresponding path program 1 times [2024-02-02 09:22:17,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:17,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280190146] [2024-02-02 09:22:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:17,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:17,631 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 09:22:17,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:17,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280190146] [2024-02-02 09:22:17,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280190146] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:17,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249917031] [2024-02-02 09:22:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:17,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:17,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:17,633 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 09:22:17,648 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 09:22:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:17,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-02 09:22:17,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:17,708 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 09:22:17,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:17,741 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 09:22:17,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249917031] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:17,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-02 09:22:17,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2024-02-02 09:22:17,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287924596] [2024-02-02 09:22:17,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:17,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:17,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:17,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-02 09:22:17,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:22:17,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 141 transitions, 1449 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:17,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:17,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:22:17,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:18,041 INFO L124 PetriNetUnfolderBase]: 1046/2041 cut-off events. [2024-02-02 09:22:18,042 INFO L125 PetriNetUnfolderBase]: For 11265/11275 co-relation queries the response was YES. [2024-02-02 09:22:18,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9629 conditions, 2041 events. 1046/2041 cut-off events. For 11265/11275 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12373 event pairs, 186 based on Foata normal form. 64/2103 useless extension candidates. Maximal degree in co-relation 9315. Up to 595 conditions per place. [2024-02-02 09:22:18,054 INFO L140 encePairwiseOnDemand]: 41/55 looper letters, 176 selfloop transitions, 45 changer transitions 5/231 dead transitions. [2024-02-02 09:22:18,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 231 transitions, 2681 flow [2024-02-02 09:22:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-02 09:22:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-02 09:22:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-02-02 09:22:18,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6909090909090909 [2024-02-02 09:22:18,055 INFO L175 Difference]: Start difference. First operand has 105 places, 141 transitions, 1449 flow. Second operand 6 states and 228 transitions. [2024-02-02 09:22:18,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 231 transitions, 2681 flow [2024-02-02 09:22:18,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 231 transitions, 2601 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-02-02 09:22:18,087 INFO L231 Difference]: Finished difference. Result has 113 places, 159 transitions, 1785 flow [2024-02-02 09:22:18,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1785, PETRI_PLACES=113, PETRI_TRANSITIONS=159} [2024-02-02 09:22:18,088 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-02-02 09:22:18,088 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 159 transitions, 1785 flow [2024-02-02 09:22:18,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:18,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:18,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:18,107 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 09:22:18,300 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,SelfDestructingSolverStorable23 [2024-02-02 09:22:18,301 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:18,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:18,301 INFO L85 PathProgramCache]: Analyzing trace with hash 169244048, now seen corresponding path program 2 times [2024-02-02 09:22:18,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:18,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800734703] [2024-02-02 09:22:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:18,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:18,335 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 09:22:18,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:18,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800734703] [2024-02-02 09:22:18,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800734703] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:18,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:18,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:22:18,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099010504] [2024-02-02 09:22:18,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:18,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:18,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:18,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:18,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:22:18,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:22:18,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 159 transitions, 1785 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:18,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:18,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:22:18,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:18,655 INFO L124 PetriNetUnfolderBase]: 1043/2028 cut-off events. [2024-02-02 09:22:18,656 INFO L125 PetriNetUnfolderBase]: For 13659/13675 co-relation queries the response was YES. [2024-02-02 09:22:18,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10677 conditions, 2028 events. 1043/2028 cut-off events. For 13659/13675 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12246 event pairs, 167 based on Foata normal form. 22/2048 useless extension candidates. Maximal degree in co-relation 10304. Up to 518 conditions per place. [2024-02-02 09:22:18,670 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 170 selfloop transitions, 35 changer transitions 19/229 dead transitions. [2024-02-02 09:22:18,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 229 transitions, 2920 flow [2024-02-02 09:22:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 09:22:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 09:22:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2024-02-02 09:22:18,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6155844155844156 [2024-02-02 09:22:18,672 INFO L175 Difference]: Start difference. First operand has 113 places, 159 transitions, 1785 flow. Second operand 7 states and 237 transitions. [2024-02-02 09:22:18,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 229 transitions, 2920 flow [2024-02-02 09:22:18,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 229 transitions, 2904 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-02-02 09:22:18,707 INFO L231 Difference]: Finished difference. Result has 122 places, 158 transitions, 1910 flow [2024-02-02 09:22:18,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1910, PETRI_PLACES=122, PETRI_TRANSITIONS=158} [2024-02-02 09:22:18,708 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2024-02-02 09:22:18,708 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 158 transitions, 1910 flow [2024-02-02 09:22:18,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:18,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:18,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:18,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-02-02 09:22:18,709 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:18,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:18,710 INFO L85 PathProgramCache]: Analyzing trace with hash -286050564, now seen corresponding path program 3 times [2024-02-02 09:22:18,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:18,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341043198] [2024-02-02 09:22:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:18,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:18,756 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 09:22:18,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:18,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341043198] [2024-02-02 09:22:18,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341043198] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:18,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:18,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:22:18,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701595653] [2024-02-02 09:22:18,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:18,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:18,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:22:18,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:22:18,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 158 transitions, 1910 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:18,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:18,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:22:18,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:19,099 INFO L124 PetriNetUnfolderBase]: 989/1900 cut-off events. [2024-02-02 09:22:19,099 INFO L125 PetriNetUnfolderBase]: For 15886/15888 co-relation queries the response was YES. [2024-02-02 09:22:19,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10509 conditions, 1900 events. 989/1900 cut-off events. For 15886/15888 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11144 event pairs, 173 based on Foata normal form. 10/1908 useless extension candidates. Maximal degree in co-relation 10122. Up to 522 conditions per place. [2024-02-02 09:22:19,111 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 192 selfloop transitions, 38 changer transitions 7/242 dead transitions. [2024-02-02 09:22:19,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 242 transitions, 3186 flow [2024-02-02 09:22:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:22:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:22:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 278 transitions. [2024-02-02 09:22:19,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318181818181818 [2024-02-02 09:22:19,113 INFO L175 Difference]: Start difference. First operand has 122 places, 158 transitions, 1910 flow. Second operand 8 states and 278 transitions. [2024-02-02 09:22:19,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 242 transitions, 3186 flow [2024-02-02 09:22:19,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 242 transitions, 3046 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:19,149 INFO L231 Difference]: Finished difference. Result has 131 places, 164 transitions, 2059 flow [2024-02-02 09:22:19,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2059, PETRI_PLACES=131, PETRI_TRANSITIONS=164} [2024-02-02 09:22:19,149 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-02-02 09:22:19,149 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 164 transitions, 2059 flow [2024-02-02 09:22:19,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:19,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:19,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:19,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-02-02 09:22:19,150 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:19,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:19,150 INFO L85 PathProgramCache]: Analyzing trace with hash 697754242, now seen corresponding path program 2 times [2024-02-02 09:22:19,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:19,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010012777] [2024-02-02 09:22:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:19,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:19,185 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 09:22:19,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:19,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010012777] [2024-02-02 09:22:19,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010012777] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:19,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:19,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:22:19,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068180739] [2024-02-02 09:22:19,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:19,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:19,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:19,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:19,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:22:19,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:22:19,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 164 transitions, 2059 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:19,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:19,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:22:19,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:19,516 INFO L124 PetriNetUnfolderBase]: 1085/2059 cut-off events. [2024-02-02 09:22:19,516 INFO L125 PetriNetUnfolderBase]: For 17099/17099 co-relation queries the response was YES. [2024-02-02 09:22:19,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11287 conditions, 2059 events. 1085/2059 cut-off events. For 17099/17099 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12084 event pairs, 155 based on Foata normal form. 8/2067 useless extension candidates. Maximal degree in co-relation 10887. Up to 750 conditions per place. [2024-02-02 09:22:19,530 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 173 selfloop transitions, 34 changer transitions 2/214 dead transitions. [2024-02-02 09:22:19,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 214 transitions, 2951 flow [2024-02-02 09:22:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-02 09:22:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-02 09:22:19,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-02-02 09:22:19,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6181818181818182 [2024-02-02 09:22:19,531 INFO L175 Difference]: Start difference. First operand has 131 places, 164 transitions, 2059 flow. Second operand 6 states and 204 transitions. [2024-02-02 09:22:19,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 214 transitions, 2951 flow [2024-02-02 09:22:19,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 214 transitions, 2813 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-02-02 09:22:19,572 INFO L231 Difference]: Finished difference. Result has 135 places, 167 transitions, 2089 flow [2024-02-02 09:22:19,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2089, PETRI_PLACES=135, PETRI_TRANSITIONS=167} [2024-02-02 09:22:19,572 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2024-02-02 09:22:19,572 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 167 transitions, 2089 flow [2024-02-02 09:22:19,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:19,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:19,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:19,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-02-02 09:22:19,573 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:19,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1810440896, now seen corresponding path program 3 times [2024-02-02 09:22:19,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:19,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526368334] [2024-02-02 09:22:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:19,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:19,602 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 09:22:19,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:19,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526368334] [2024-02-02 09:22:19,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526368334] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:19,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:19,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:22:19,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943919034] [2024-02-02 09:22:19,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:19,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:19,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:19,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:19,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:22:19,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:22:19,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 167 transitions, 2089 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:19,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:19,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:22:19,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:20,000 INFO L124 PetriNetUnfolderBase]: 1292/2487 cut-off events. [2024-02-02 09:22:20,000 INFO L125 PetriNetUnfolderBase]: For 21202/21204 co-relation queries the response was YES. [2024-02-02 09:22:20,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13363 conditions, 2487 events. 1292/2487 cut-off events. For 21202/21204 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15329 event pairs, 437 based on Foata normal form. 72/2557 useless extension candidates. Maximal degree in co-relation 12911. Up to 1556 conditions per place. [2024-02-02 09:22:20,017 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 197 selfloop transitions, 88 changer transitions 4/294 dead transitions. [2024-02-02 09:22:20,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 294 transitions, 4134 flow [2024-02-02 09:22:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:22:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:22:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 280 transitions. [2024-02-02 09:22:20,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-02-02 09:22:20,019 INFO L175 Difference]: Start difference. First operand has 135 places, 167 transitions, 2089 flow. Second operand 8 states and 280 transitions. [2024-02-02 09:22:20,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 294 transitions, 4134 flow [2024-02-02 09:22:20,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 294 transitions, 4050 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:20,065 INFO L231 Difference]: Finished difference. Result has 142 places, 215 transitions, 3077 flow [2024-02-02 09:22:20,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2033, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3077, PETRI_PLACES=142, PETRI_TRANSITIONS=215} [2024-02-02 09:22:20,069 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 85 predicate places. [2024-02-02 09:22:20,069 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 215 transitions, 3077 flow [2024-02-02 09:22:20,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:20,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:20,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:20,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-02-02 09:22:20,070 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:20,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash 395501850, now seen corresponding path program 4 times [2024-02-02 09:22:20,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:20,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423372261] [2024-02-02 09:22:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:20,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:20,101 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 09:22:20,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:20,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423372261] [2024-02-02 09:22:20,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423372261] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:20,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:20,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:22:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822799920] [2024-02-02 09:22:20,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:20,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:20,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:20,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:20,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:22:20,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:22:20,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 215 transitions, 3077 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:20,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:20,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:22:20,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:20,486 INFO L124 PetriNetUnfolderBase]: 1111/2198 cut-off events. [2024-02-02 09:22:20,486 INFO L125 PetriNetUnfolderBase]: For 22417/22421 co-relation queries the response was YES. [2024-02-02 09:22:20,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13148 conditions, 2198 events. 1111/2198 cut-off events. For 22417/22421 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13572 event pairs, 131 based on Foata normal form. 64/2258 useless extension candidates. Maximal degree in co-relation 12426. Up to 1229 conditions per place. [2024-02-02 09:22:20,499 INFO L140 encePairwiseOnDemand]: 41/55 looper letters, 171 selfloop transitions, 72 changer transitions 7/255 dead transitions. [2024-02-02 09:22:20,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 255 transitions, 3898 flow [2024-02-02 09:22:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 09:22:20,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 09:22:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 236 transitions. [2024-02-02 09:22:20,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.612987012987013 [2024-02-02 09:22:20,500 INFO L175 Difference]: Start difference. First operand has 142 places, 215 transitions, 3077 flow. Second operand 7 states and 236 transitions. [2024-02-02 09:22:20,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 255 transitions, 3898 flow [2024-02-02 09:22:20,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 255 transitions, 3858 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-02-02 09:22:20,546 INFO L231 Difference]: Finished difference. Result has 151 places, 204 transitions, 3133 flow [2024-02-02 09:22:20,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3133, PETRI_PLACES=151, PETRI_TRANSITIONS=204} [2024-02-02 09:22:20,547 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 94 predicate places. [2024-02-02 09:22:20,547 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 204 transitions, 3133 flow [2024-02-02 09:22:20,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:20,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:20,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:20,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-02-02 09:22:20,548 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:20,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:20,548 INFO L85 PathProgramCache]: Analyzing trace with hash -50522722, now seen corresponding path program 4 times [2024-02-02 09:22:20,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:20,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112603408] [2024-02-02 09:22:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:20,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:20,577 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 09:22:20,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:20,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112603408] [2024-02-02 09:22:20,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112603408] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:20,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:20,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:22:20,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516176069] [2024-02-02 09:22:20,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:20,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:20,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:20,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:20,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:22:20,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:22:20,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 204 transitions, 3133 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:20,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:20,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:22:20,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:20,956 INFO L124 PetriNetUnfolderBase]: 1072/2115 cut-off events. [2024-02-02 09:22:20,956 INFO L125 PetriNetUnfolderBase]: For 24793/24793 co-relation queries the response was YES. [2024-02-02 09:22:20,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13288 conditions, 2115 events. 1072/2115 cut-off events. For 24793/24793 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12841 event pairs, 197 based on Foata normal form. 12/2126 useless extension candidates. Maximal degree in co-relation 12536. Up to 574 conditions per place. [2024-02-02 09:22:20,970 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 212 selfloop transitions, 58 changer transitions 12/287 dead transitions. [2024-02-02 09:22:20,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 287 transitions, 4617 flow [2024-02-02 09:22:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:22:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:22:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 273 transitions. [2024-02-02 09:22:20,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204545454545455 [2024-02-02 09:22:20,972 INFO L175 Difference]: Start difference. First operand has 151 places, 204 transitions, 3133 flow. Second operand 8 states and 273 transitions. [2024-02-02 09:22:20,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 287 transitions, 4617 flow [2024-02-02 09:22:21,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 287 transitions, 4521 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-02-02 09:22:21,026 INFO L231 Difference]: Finished difference. Result has 159 places, 209 transitions, 3251 flow [2024-02-02 09:22:21,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3050, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3251, PETRI_PLACES=159, PETRI_TRANSITIONS=209} [2024-02-02 09:22:21,027 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 102 predicate places. [2024-02-02 09:22:21,027 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 209 transitions, 3251 flow [2024-02-02 09:22:21,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:21,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:21,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:21,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-02-02 09:22:21,028 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:21,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:21,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1162247792, now seen corresponding path program 5 times [2024-02-02 09:22:21,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:21,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932280370] [2024-02-02 09:22:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:21,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:21,067 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 09:22:21,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:21,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932280370] [2024-02-02 09:22:21,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932280370] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:21,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:21,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:22:21,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328059720] [2024-02-02 09:22:21,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:21,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:21,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:22:21,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:22:21,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 209 transitions, 3251 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:21,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:21,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:22:21,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:21,449 INFO L124 PetriNetUnfolderBase]: 988/1918 cut-off events. [2024-02-02 09:22:21,449 INFO L125 PetriNetUnfolderBase]: For 23557/23557 co-relation queries the response was YES. [2024-02-02 09:22:21,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12111 conditions, 1918 events. 988/1918 cut-off events. For 23557/23557 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11193 event pairs, 109 based on Foata normal form. 32/1949 useless extension candidates. Maximal degree in co-relation 11868. Up to 632 conditions per place. [2024-02-02 09:22:21,462 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 203 selfloop transitions, 34 changer transitions 5/247 dead transitions. [2024-02-02 09:22:21,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 247 transitions, 4032 flow [2024-02-02 09:22:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-02 09:22:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-02 09:22:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 205 transitions. [2024-02-02 09:22:21,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-02-02 09:22:21,464 INFO L175 Difference]: Start difference. First operand has 159 places, 209 transitions, 3251 flow. Second operand 6 states and 205 transitions. [2024-02-02 09:22:21,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 247 transitions, 4032 flow [2024-02-02 09:22:21,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 247 transitions, 3838 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-02-02 09:22:21,516 INFO L231 Difference]: Finished difference. Result has 159 places, 199 transitions, 2996 flow [2024-02-02 09:22:21,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2996, PETRI_PLACES=159, PETRI_TRANSITIONS=199} [2024-02-02 09:22:21,517 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 102 predicate places. [2024-02-02 09:22:21,517 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 199 transitions, 2996 flow [2024-02-02 09:22:21,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:21,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:21,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:21,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-02-02 09:22:21,518 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:21,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash -669965998, now seen corresponding path program 5 times [2024-02-02 09:22:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116524470] [2024-02-02 09:22:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:21,553 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 09:22:21,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:21,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116524470] [2024-02-02 09:22:21,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116524470] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:21,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:22:21,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 09:22:21,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546601055] [2024-02-02 09:22:21,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:21,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-02 09:22:21,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:21,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-02 09:22:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-02 09:22:21,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:22:21,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 199 transitions, 2996 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:21,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:21,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:22:21,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:21,859 INFO L124 PetriNetUnfolderBase]: 954/1803 cut-off events. [2024-02-02 09:22:21,860 INFO L125 PetriNetUnfolderBase]: For 21597/21597 co-relation queries the response was YES. [2024-02-02 09:22:21,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11058 conditions, 1803 events. 954/1803 cut-off events. For 21597/21597 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10025 event pairs, 217 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 10365. Up to 718 conditions per place. [2024-02-02 09:22:21,872 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 172 selfloop transitions, 42 changer transitions 12/231 dead transitions. [2024-02-02 09:22:21,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 231 transitions, 3728 flow [2024-02-02 09:22:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 09:22:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 09:22:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-02-02 09:22:21,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5662337662337662 [2024-02-02 09:22:21,873 INFO L175 Difference]: Start difference. First operand has 159 places, 199 transitions, 2996 flow. Second operand 7 states and 218 transitions. [2024-02-02 09:22:21,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 231 transitions, 3728 flow [2024-02-02 09:22:21,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 231 transitions, 3618 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:21,925 INFO L231 Difference]: Finished difference. Result has 158 places, 195 transitions, 2905 flow [2024-02-02 09:22:21,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2860, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2905, PETRI_PLACES=158, PETRI_TRANSITIONS=195} [2024-02-02 09:22:21,926 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 101 predicate places. [2024-02-02 09:22:21,926 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 195 transitions, 2905 flow [2024-02-02 09:22:21,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 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 09:22:21,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:21,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:21,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-02-02 09:22:21,926 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:21,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1023599598, now seen corresponding path program 1 times [2024-02-02 09:22:21,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:21,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002207504] [2024-02-02 09:22:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:21,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:22,031 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 09:22:22,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:22,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002207504] [2024-02-02 09:22:22,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002207504] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:22,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906148400] [2024-02-02 09:22:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:22,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:22,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:22,033 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 09:22:22,037 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 09:22:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:22,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:22:22,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:22,237 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 09:22:22,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:22,410 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 09:22:22,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906148400] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:22,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:22,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-02 09:22:22,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190719173] [2024-02-02 09:22:22,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:22,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-02 09:22:22,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:22,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-02 09:22:22,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-02-02 09:22:22,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:22,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 195 transitions, 2905 flow. Second operand has 22 states, 22 states have (on average 22.727272727272727) internal successors, (500), 22 states have internal predecessors, (500), 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 09:22:22,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:22,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:22,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:23,785 INFO L124 PetriNetUnfolderBase]: 1336/2550 cut-off events. [2024-02-02 09:22:23,785 INFO L125 PetriNetUnfolderBase]: For 26965/26965 co-relation queries the response was YES. [2024-02-02 09:22:23,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15209 conditions, 2550 events. 1336/2550 cut-off events. For 26965/26965 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15389 event pairs, 75 based on Foata normal form. 6/2556 useless extension candidates. Maximal degree in co-relation 14634. Up to 540 conditions per place. [2024-02-02 09:22:23,803 INFO L140 encePairwiseOnDemand]: 39/55 looper letters, 164 selfloop transitions, 206 changer transitions 20/395 dead transitions. [2024-02-02 09:22:23,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 395 transitions, 6024 flow [2024-02-02 09:22:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-02 09:22:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-02 09:22:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 580 transitions. [2024-02-02 09:22:23,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021645021645021 [2024-02-02 09:22:23,805 INFO L175 Difference]: Start difference. First operand has 158 places, 195 transitions, 2905 flow. Second operand 21 states and 580 transitions. [2024-02-02 09:22:23,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 395 transitions, 6024 flow [2024-02-02 09:22:23,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 395 transitions, 5872 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:23,866 INFO L231 Difference]: Finished difference. Result has 185 places, 299 transitions, 5185 flow [2024-02-02 09:22:23,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5185, PETRI_PLACES=185, PETRI_TRANSITIONS=299} [2024-02-02 09:22:23,866 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2024-02-02 09:22:23,867 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 299 transitions, 5185 flow [2024-02-02 09:22:23,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.727272727272727) internal successors, (500), 22 states have internal predecessors, (500), 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 09:22:23,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:23,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:23,880 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 09:22:24,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:24,077 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:24,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1993749346, now seen corresponding path program 2 times [2024-02-02 09:22:24,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:24,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357679649] [2024-02-02 09:22:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:24,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:24,179 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 09:22:24,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:24,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357679649] [2024-02-02 09:22:24,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357679649] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:24,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45464170] [2024-02-02 09:22:24,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:22:24,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:24,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:24,181 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 09:22:24,182 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 09:22:24,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:22:24,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:24,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:22:24,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:24,362 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 09:22:24,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:24,535 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 09:22:24,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45464170] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:24,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:24,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-02 09:22:24,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487012772] [2024-02-02 09:22:24,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:24,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-02 09:22:24,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:24,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-02 09:22:24,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-02-02 09:22:24,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:24,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 299 transitions, 5185 flow. Second operand has 22 states, 22 states have (on average 22.454545454545453) internal successors, (494), 22 states have internal predecessors, (494), 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 09:22:24,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:24,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:24,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:25,631 INFO L124 PetriNetUnfolderBase]: 1278/2428 cut-off events. [2024-02-02 09:22:25,632 INFO L125 PetriNetUnfolderBase]: For 34097/34097 co-relation queries the response was YES. [2024-02-02 09:22:25,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16651 conditions, 2428 events. 1278/2428 cut-off events. For 34097/34097 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14439 event pairs, 71 based on Foata normal form. 3/2431 useless extension candidates. Maximal degree in co-relation 16555. Up to 462 conditions per place. [2024-02-02 09:22:25,652 INFO L140 encePairwiseOnDemand]: 40/55 looper letters, 121 selfloop transitions, 179 changer transitions 76/381 dead transitions. [2024-02-02 09:22:25,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 381 transitions, 6568 flow [2024-02-02 09:22:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-02 09:22:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-02 09:22:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 494 transitions. [2024-02-02 09:22:25,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.498989898989899 [2024-02-02 09:22:25,654 INFO L175 Difference]: Start difference. First operand has 185 places, 299 transitions, 5185 flow. Second operand 18 states and 494 transitions. [2024-02-02 09:22:25,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 381 transitions, 6568 flow [2024-02-02 09:22:25,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 381 transitions, 6349 flow, removed 92 selfloop flow, removed 4 redundant places. [2024-02-02 09:22:25,766 INFO L231 Difference]: Finished difference. Result has 200 places, 265 transitions, 4834 flow [2024-02-02 09:22:25,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=4977, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4834, PETRI_PLACES=200, PETRI_TRANSITIONS=265} [2024-02-02 09:22:25,767 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 143 predicate places. [2024-02-02 09:22:25,767 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 265 transitions, 4834 flow [2024-02-02 09:22:25,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.454545454545453) internal successors, (494), 22 states have internal predecessors, (494), 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 09:22:25,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:25,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:25,778 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 09:22:25,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:25,978 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:25,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:25,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1072695868, now seen corresponding path program 3 times [2024-02-02 09:22:25,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:25,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245371810] [2024-02-02 09:22:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:25,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:26,090 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 09:22:26,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245371810] [2024-02-02 09:22:26,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245371810] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868902151] [2024-02-02 09:22:26,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-02 09:22:26,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:26,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:26,092 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 09:22:26,128 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 09:22:26,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-02 09:22:26,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:26,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-02 09:22:26,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:26,247 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 09:22:26,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:26,338 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 09:22:26,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868902151] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:26,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:26,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2024-02-02 09:22:26,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053263191] [2024-02-02 09:22:26,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:26,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-02 09:22:26,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:26,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-02 09:22:26,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-02-02 09:22:26,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:26,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 265 transitions, 4834 flow. Second operand has 18 states, 18 states have (on average 23.0) internal successors, (414), 18 states have internal predecessors, (414), 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 09:22:26,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:26,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:26,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:27,421 INFO L124 PetriNetUnfolderBase]: 1072/2066 cut-off events. [2024-02-02 09:22:27,421 INFO L125 PetriNetUnfolderBase]: For 30653/30653 co-relation queries the response was YES. [2024-02-02 09:22:27,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14587 conditions, 2066 events. 1072/2066 cut-off events. For 30653/30653 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11969 event pairs, 97 based on Foata normal form. 4/2070 useless extension candidates. Maximal degree in co-relation 14524. Up to 564 conditions per place. [2024-02-02 09:22:27,434 INFO L140 encePairwiseOnDemand]: 41/55 looper letters, 152 selfloop transitions, 195 changer transitions 18/370 dead transitions. [2024-02-02 09:22:27,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 370 transitions, 6658 flow [2024-02-02 09:22:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-02 09:22:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-02 09:22:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 660 transitions. [2024-02-02 09:22:27,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-02-02 09:22:27,448 INFO L175 Difference]: Start difference. First operand has 200 places, 265 transitions, 4834 flow. Second operand 25 states and 660 transitions. [2024-02-02 09:22:27,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 370 transitions, 6658 flow [2024-02-02 09:22:27,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 370 transitions, 6522 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-02-02 09:22:27,527 INFO L231 Difference]: Finished difference. Result has 210 places, 287 transitions, 5551 flow [2024-02-02 09:22:27,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=4725, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5551, PETRI_PLACES=210, PETRI_TRANSITIONS=287} [2024-02-02 09:22:27,527 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 153 predicate places. [2024-02-02 09:22:27,527 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 287 transitions, 5551 flow [2024-02-02 09:22:27,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.0) internal successors, (414), 18 states have internal predecessors, (414), 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 09:22:27,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:27,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:27,538 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 09:22:27,728 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,SelfDestructingSolverStorable34 [2024-02-02 09:22:27,729 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:27,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1103141902, now seen corresponding path program 4 times [2024-02-02 09:22:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:27,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506979849] [2024-02-02 09:22:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:27,836 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 09:22:27,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:27,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506979849] [2024-02-02 09:22:27,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506979849] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:27,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547197785] [2024-02-02 09:22:27,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-02 09:22:27,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:27,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:27,837 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 09:22:27,864 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 09:22:27,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-02 09:22:27,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:27,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:22:27,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:28,002 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 09:22:28,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:28,148 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 09:22:28,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547197785] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:28,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:28,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-02 09:22:28,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420896614] [2024-02-02 09:22:28,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:28,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-02 09:22:28,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:28,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-02 09:22:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-02-02 09:22:28,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:28,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 287 transitions, 5551 flow. Second operand has 22 states, 22 states have (on average 22.5) internal successors, (495), 22 states have internal predecessors, (495), 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 09:22:28,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:28,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:28,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:29,494 INFO L124 PetriNetUnfolderBase]: 1593/2995 cut-off events. [2024-02-02 09:22:29,495 INFO L125 PetriNetUnfolderBase]: For 52497/52497 co-relation queries the response was YES. [2024-02-02 09:22:29,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22618 conditions, 2995 events. 1593/2995 cut-off events. For 52497/52497 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18782 event pairs, 61 based on Foata normal form. 19/3014 useless extension candidates. Maximal degree in co-relation 22555. Up to 654 conditions per place. [2024-02-02 09:22:29,518 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 187 selfloop transitions, 196 changer transitions 172/560 dead transitions. [2024-02-02 09:22:29,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 560 transitions, 10921 flow [2024-02-02 09:22:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-02 09:22:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-02 09:22:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 788 transitions. [2024-02-02 09:22:29,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404388714733544 [2024-02-02 09:22:29,520 INFO L175 Difference]: Start difference. First operand has 210 places, 287 transitions, 5551 flow. Second operand 29 states and 788 transitions. [2024-02-02 09:22:29,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 560 transitions, 10921 flow [2024-02-02 09:22:29,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 560 transitions, 10044 flow, removed 98 selfloop flow, removed 16 redundant places. [2024-02-02 09:22:29,727 INFO L231 Difference]: Finished difference. Result has 231 places, 310 transitions, 6249 flow [2024-02-02 09:22:29,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6249, PETRI_PLACES=231, PETRI_TRANSITIONS=310} [2024-02-02 09:22:29,728 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 174 predicate places. [2024-02-02 09:22:29,728 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 310 transitions, 6249 flow [2024-02-02 09:22:29,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.5) internal successors, (495), 22 states have internal predecessors, (495), 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 09:22:29,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:29,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:29,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-02 09:22:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:29,940 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:29,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1744004908, now seen corresponding path program 5 times [2024-02-02 09:22:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:29,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685068967] [2024-02-02 09:22:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:30,045 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 09:22:30,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:30,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685068967] [2024-02-02 09:22:30,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685068967] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:30,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728038283] [2024-02-02 09:22:30,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-02 09:22:30,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:30,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:30,046 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 09:22:30,076 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 09:22:30,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-02 09:22:30,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:30,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-02 09:22:30,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:30,200 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-02 09:22:30,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728038283] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:30,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-02 09:22:30,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 14 [2024-02-02 09:22:30,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316232246] [2024-02-02 09:22:30,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:30,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-02 09:22:30,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-02 09:22:30,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-02-02 09:22:30,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:30,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 310 transitions, 6249 flow. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 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 09:22:30,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:30,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:30,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:30,716 INFO L124 PetriNetUnfolderBase]: 1019/2008 cut-off events. [2024-02-02 09:22:30,716 INFO L125 PetriNetUnfolderBase]: For 39277/39325 co-relation queries the response was YES. [2024-02-02 09:22:30,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15525 conditions, 2008 events. 1019/2008 cut-off events. For 39277/39325 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12033 event pairs, 92 based on Foata normal form. 24/2027 useless extension candidates. Maximal degree in co-relation 15455. Up to 620 conditions per place. [2024-02-02 09:22:30,731 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 220 selfloop transitions, 87 changer transitions 19/336 dead transitions. [2024-02-02 09:22:30,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 336 transitions, 7100 flow [2024-02-02 09:22:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:22:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:22:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-02-02 09:22:30,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5840909090909091 [2024-02-02 09:22:30,732 INFO L175 Difference]: Start difference. First operand has 231 places, 310 transitions, 6249 flow. Second operand 8 states and 257 transitions. [2024-02-02 09:22:30,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 336 transitions, 7100 flow [2024-02-02 09:22:30,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 336 transitions, 6302 flow, removed 82 selfloop flow, removed 27 redundant places. [2024-02-02 09:22:30,847 INFO L231 Difference]: Finished difference. Result has 198 places, 304 transitions, 5638 flow [2024-02-02 09:22:30,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5486, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5638, PETRI_PLACES=198, PETRI_TRANSITIONS=304} [2024-02-02 09:22:30,848 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 141 predicate places. [2024-02-02 09:22:30,848 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 304 transitions, 5638 flow [2024-02-02 09:22:30,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 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 09:22:30,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:30,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:30,861 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 09:22:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:31,049 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:31,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash -766432388, now seen corresponding path program 6 times [2024-02-02 09:22:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:31,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342136279] [2024-02-02 09:22:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:31,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:31,139 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 09:22:31,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:31,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342136279] [2024-02-02 09:22:31,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342136279] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:31,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839078850] [2024-02-02 09:22:31,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-02 09:22:31,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:31,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:31,157 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 09:22:31,177 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 09:22:31,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-02 09:22:31,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:31,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:22:31,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:31,341 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 09:22:31,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:31,480 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 09:22:31,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839078850] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:31,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:31,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-02 09:22:31,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808324214] [2024-02-02 09:22:31,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:31,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-02 09:22:31,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:31,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-02 09:22:31,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-02-02 09:22:31,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:31,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 304 transitions, 5638 flow. Second operand has 22 states, 22 states have (on average 22.636363636363637) internal successors, (498), 22 states have internal predecessors, (498), 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 09:22:31,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:31,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:31,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:32,993 INFO L124 PetriNetUnfolderBase]: 1535/2923 cut-off events. [2024-02-02 09:22:32,993 INFO L125 PetriNetUnfolderBase]: For 42759/42759 co-relation queries the response was YES. [2024-02-02 09:22:33,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21129 conditions, 2923 events. 1535/2923 cut-off events. For 42759/42759 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18511 event pairs, 41 based on Foata normal form. 3/2926 useless extension candidates. Maximal degree in co-relation 21070. Up to 706 conditions per place. [2024-02-02 09:22:33,014 INFO L140 encePairwiseOnDemand]: 40/55 looper letters, 129 selfloop transitions, 301 changer transitions 141/576 dead transitions. [2024-02-02 09:22:33,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 576 transitions, 10824 flow [2024-02-02 09:22:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-02-02 09:22:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-02-02 09:22:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1025 transitions. [2024-02-02 09:22:33,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-02-02 09:22:33,016 INFO L175 Difference]: Start difference. First operand has 198 places, 304 transitions, 5638 flow. Second operand 41 states and 1025 transitions. [2024-02-02 09:22:33,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 576 transitions, 10824 flow [2024-02-02 09:22:33,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 576 transitions, 10493 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-02-02 09:22:33,154 INFO L231 Difference]: Finished difference. Result has 232 places, 367 transitions, 7319 flow [2024-02-02 09:22:33,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5425, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=7319, PETRI_PLACES=232, PETRI_TRANSITIONS=367} [2024-02-02 09:22:33,155 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 175 predicate places. [2024-02-02 09:22:33,155 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 367 transitions, 7319 flow [2024-02-02 09:22:33,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.636363636363637) internal successors, (498), 22 states have internal predecessors, (498), 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 09:22:33,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:33,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:33,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-02-02 09:22:33,356 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,SelfDestructingSolverStorable37 [2024-02-02 09:22:33,356 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:33,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:33,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1787432194, now seen corresponding path program 7 times [2024-02-02 09:22:33,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:33,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727056344] [2024-02-02 09:22:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:33,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:33,453 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 09:22:33,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:33,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727056344] [2024-02-02 09:22:33,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727056344] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:33,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810938764] [2024-02-02 09:22:33,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-02 09:22:33,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:33,456 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 09:22:33,475 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 09:22:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:33,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:22:33,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:33,631 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 09:22:33,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:33,754 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 09:22:33,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810938764] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:33,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:33,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-02 09:22:33,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55753714] [2024-02-02 09:22:33,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:33,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-02 09:22:33,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:33,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-02 09:22:33,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-02-02 09:22:33,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:33,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 367 transitions, 7319 flow. Second operand has 22 states, 22 states have (on average 22.363636363636363) internal successors, (492), 22 states have internal predecessors, (492), 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 09:22:33,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:33,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:33,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:35,411 INFO L124 PetriNetUnfolderBase]: 1920/3709 cut-off events. [2024-02-02 09:22:35,412 INFO L125 PetriNetUnfolderBase]: For 61126/61134 co-relation queries the response was YES. [2024-02-02 09:22:35,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27507 conditions, 3709 events. 1920/3709 cut-off events. For 61126/61134 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25216 event pairs, 58 based on Foata normal form. 120/3829 useless extension candidates. Maximal degree in co-relation 27447. Up to 902 conditions per place. [2024-02-02 09:22:35,507 INFO L140 encePairwiseOnDemand]: 39/55 looper letters, 171 selfloop transitions, 442 changer transitions 80/698 dead transitions. [2024-02-02 09:22:35,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 698 transitions, 13789 flow [2024-02-02 09:22:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-02-02 09:22:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-02-02 09:22:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 1085 transitions. [2024-02-02 09:22:35,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-02-02 09:22:35,509 INFO L175 Difference]: Start difference. First operand has 232 places, 367 transitions, 7319 flow. Second operand 42 states and 1085 transitions. [2024-02-02 09:22:35,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 698 transitions, 13789 flow [2024-02-02 09:22:35,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 698 transitions, 12151 flow, removed 194 selfloop flow, removed 22 redundant places. [2024-02-02 09:22:35,692 INFO L231 Difference]: Finished difference. Result has 258 places, 520 transitions, 10438 flow [2024-02-02 09:22:35,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=10438, PETRI_PLACES=258, PETRI_TRANSITIONS=520} [2024-02-02 09:22:35,693 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 201 predicate places. [2024-02-02 09:22:35,693 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 520 transitions, 10438 flow [2024-02-02 09:22:35,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.363636363636363) internal successors, (492), 22 states have internal predecessors, (492), 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 09:22:35,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:35,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:35,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:35,902 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,SelfDestructingSolverStorable38 [2024-02-02 09:22:35,903 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:35,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:35,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1518215814, now seen corresponding path program 8 times [2024-02-02 09:22:35,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:35,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266665462] [2024-02-02 09:22:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:35,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:36,002 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 09:22:36,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:36,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266665462] [2024-02-02 09:22:36,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266665462] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:36,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42360835] [2024-02-02 09:22:36,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:22:36,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:36,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:36,004 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 09:22:36,007 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 09:22:36,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:22:36,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:36,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:22:36,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:36,173 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 09:22:36,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:36,316 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 09:22:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42360835] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:36,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:36,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-02 09:22:36,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363675827] [2024-02-02 09:22:36,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:36,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-02 09:22:36,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-02 09:22:36,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-02-02 09:22:36,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:36,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 520 transitions, 10438 flow. Second operand has 22 states, 22 states have (on average 22.363636363636363) internal successors, (492), 22 states have internal predecessors, (492), 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 09:22:36,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:36,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:36,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:38,138 INFO L124 PetriNetUnfolderBase]: 2110/4005 cut-off events. [2024-02-02 09:22:38,138 INFO L125 PetriNetUnfolderBase]: For 67588/67588 co-relation queries the response was YES. [2024-02-02 09:22:38,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30968 conditions, 4005 events. 2110/4005 cut-off events. For 67588/67588 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27057 event pairs, 56 based on Foata normal form. 14/4019 useless extension candidates. Maximal degree in co-relation 30896. Up to 1044 conditions per place. [2024-02-02 09:22:38,171 INFO L140 encePairwiseOnDemand]: 38/55 looper letters, 254 selfloop transitions, 480 changer transitions 41/780 dead transitions. [2024-02-02 09:22:38,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 780 transitions, 16222 flow [2024-02-02 09:22:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-02 09:22:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-02 09:22:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 898 transitions. [2024-02-02 09:22:38,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802139037433155 [2024-02-02 09:22:38,173 INFO L175 Difference]: Start difference. First operand has 258 places, 520 transitions, 10438 flow. Second operand 34 states and 898 transitions. [2024-02-02 09:22:38,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 780 transitions, 16222 flow [2024-02-02 09:22:38,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 780 transitions, 15698 flow, removed 134 selfloop flow, removed 13 redundant places. [2024-02-02 09:22:38,471 INFO L231 Difference]: Finished difference. Result has 279 places, 637 transitions, 13971 flow [2024-02-02 09:22:38,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=9842, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=13971, PETRI_PLACES=279, PETRI_TRANSITIONS=637} [2024-02-02 09:22:38,472 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 222 predicate places. [2024-02-02 09:22:38,472 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 637 transitions, 13971 flow [2024-02-02 09:22:38,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.363636363636363) internal successors, (492), 22 states have internal predecessors, (492), 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 09:22:38,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:38,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:38,483 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 09:22:38,673 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,SelfDestructingSolverStorable39 [2024-02-02 09:22:38,673 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:38,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:38,673 INFO L85 PathProgramCache]: Analyzing trace with hash 322854676, now seen corresponding path program 9 times [2024-02-02 09:22:38,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:38,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193937516] [2024-02-02 09:22:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:38,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:38,799 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 09:22:38,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:38,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193937516] [2024-02-02 09:22:38,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193937516] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:38,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247382196] [2024-02-02 09:22:38,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-02 09:22:38,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:38,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:38,801 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 09:22:38,802 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 09:22:38,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-02 09:22:38,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:38,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:22:38,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:38,971 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 09:22:38,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:39,146 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 09:22:39,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247382196] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:39,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:39,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-02 09:22:39,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884265431] [2024-02-02 09:22:39,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:39,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-02 09:22:39,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-02 09:22:39,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-02-02 09:22:39,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:39,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 637 transitions, 13971 flow. Second operand has 23 states, 23 states have (on average 22.782608695652176) internal successors, (524), 23 states have internal predecessors, (524), 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 09:22:39,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:39,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:39,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:41,001 INFO L124 PetriNetUnfolderBase]: 2018/3847 cut-off events. [2024-02-02 09:22:41,001 INFO L125 PetriNetUnfolderBase]: For 73940/73948 co-relation queries the response was YES. [2024-02-02 09:22:41,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31676 conditions, 3847 events. 2018/3847 cut-off events. For 73940/73948 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25652 event pairs, 28 based on Foata normal form. 16/3863 useless extension candidates. Maximal degree in co-relation 31603. Up to 994 conditions per place. [2024-02-02 09:22:41,035 INFO L140 encePairwiseOnDemand]: 37/55 looper letters, 181 selfloop transitions, 568 changer transitions 42/796 dead transitions. [2024-02-02 09:22:41,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 796 transitions, 17706 flow [2024-02-02 09:22:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-02 09:22:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-02 09:22:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 970 transitions. [2024-02-02 09:22:41,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46411483253588515 [2024-02-02 09:22:41,037 INFO L175 Difference]: Start difference. First operand has 279 places, 637 transitions, 13971 flow. Second operand 38 states and 970 transitions. [2024-02-02 09:22:41,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 796 transitions, 17706 flow [2024-02-02 09:22:41,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 796 transitions, 17367 flow, removed 54 selfloop flow, removed 12 redundant places. [2024-02-02 09:22:41,471 INFO L231 Difference]: Finished difference. Result has 309 places, 684 transitions, 16207 flow [2024-02-02 09:22:41,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=13609, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16207, PETRI_PLACES=309, PETRI_TRANSITIONS=684} [2024-02-02 09:22:41,472 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 252 predicate places. [2024-02-02 09:22:41,472 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 684 transitions, 16207 flow [2024-02-02 09:22:41,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 22.782608695652176) internal successors, (524), 23 states have internal predecessors, (524), 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 09:22:41,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:41,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:41,483 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 09:22:41,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-02-02 09:22:41,679 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:41,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:41,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1586322404, now seen corresponding path program 10 times [2024-02-02 09:22:41,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:41,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192859113] [2024-02-02 09:22:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:41,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:41,769 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 09:22:41,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:41,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192859113] [2024-02-02 09:22:41,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192859113] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:41,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621038807] [2024-02-02 09:22:41,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-02 09:22:41,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:41,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:41,770 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 09:22:41,792 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 09:22:41,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-02 09:22:41,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:41,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:22:41,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:41,961 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 09:22:41,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:42,108 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 09:22:42,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621038807] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:42,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:42,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-02 09:22:42,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061622645] [2024-02-02 09:22:42,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:42,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-02 09:22:42,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:42,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-02 09:22:42,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-02-02 09:22:42,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:42,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 684 transitions, 16207 flow. Second operand has 22 states, 22 states have (on average 22.636363636363637) internal successors, (498), 22 states have internal predecessors, (498), 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 09:22:42,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:42,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:42,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:44,445 INFO L124 PetriNetUnfolderBase]: 2127/4034 cut-off events. [2024-02-02 09:22:44,445 INFO L125 PetriNetUnfolderBase]: For 83735/83751 co-relation queries the response was YES. [2024-02-02 09:22:44,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34904 conditions, 4034 events. 2127/4034 cut-off events. For 83735/83751 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26888 event pairs, 44 based on Foata normal form. 10/4044 useless extension candidates. Maximal degree in co-relation 34827. Up to 1054 conditions per place. [2024-02-02 09:22:44,481 INFO L140 encePairwiseOnDemand]: 36/55 looper letters, 228 selfloop transitions, 614 changer transitions 32/879 dead transitions. [2024-02-02 09:22:44,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 879 transitions, 20309 flow [2024-02-02 09:22:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-02-02 09:22:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-02-02 09:22:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 1298 transitions. [2024-02-02 09:22:44,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627450980392157 [2024-02-02 09:22:44,483 INFO L175 Difference]: Start difference. First operand has 309 places, 684 transitions, 16207 flow. Second operand 51 states and 1298 transitions. [2024-02-02 09:22:44,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 879 transitions, 20309 flow [2024-02-02 09:22:44,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 879 transitions, 19866 flow, removed 68 selfloop flow, removed 14 redundant places. [2024-02-02 09:22:44,895 INFO L231 Difference]: Finished difference. Result has 349 places, 731 transitions, 18382 flow [2024-02-02 09:22:44,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=15819, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=18382, PETRI_PLACES=349, PETRI_TRANSITIONS=731} [2024-02-02 09:22:44,896 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 292 predicate places. [2024-02-02 09:22:44,896 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 731 transitions, 18382 flow [2024-02-02 09:22:44,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.636363636363637) internal successors, (498), 22 states have internal predecessors, (498), 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 09:22:44,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:44,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:44,908 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 09:22:45,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:45,100 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:45,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1713787388, now seen corresponding path program 11 times [2024-02-02 09:22:45,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:45,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600274029] [2024-02-02 09:22:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:45,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:45,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:45,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600274029] [2024-02-02 09:22:45,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600274029] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:45,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709715577] [2024-02-02 09:22:45,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-02 09:22:45,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:45,194 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 09:22:45,220 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 09:22:45,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-02 09:22:45,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:45,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-02 09:22:45,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:45,332 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 09:22:45,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:45,434 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 09:22:45,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709715577] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:45,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:45,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2024-02-02 09:22:45,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107789860] [2024-02-02 09:22:45,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:45,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-02 09:22:45,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-02 09:22:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-02-02 09:22:45,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:45,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 731 transitions, 18382 flow. Second operand has 18 states, 18 states have (on average 22.833333333333332) internal successors, (411), 18 states have internal predecessors, (411), 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 09:22:45,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:45,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:45,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:47,103 INFO L124 PetriNetUnfolderBase]: 2133/4034 cut-off events. [2024-02-02 09:22:47,104 INFO L125 PetriNetUnfolderBase]: For 94388/94396 co-relation queries the response was YES. [2024-02-02 09:22:47,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36999 conditions, 4034 events. 2133/4034 cut-off events. For 94388/94396 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26744 event pairs, 53 based on Foata normal form. 10/4044 useless extension candidates. Maximal degree in co-relation 36915. Up to 1055 conditions per place. [2024-02-02 09:22:47,145 INFO L140 encePairwiseOnDemand]: 40/55 looper letters, 259 selfloop transitions, 526 changer transitions 39/829 dead transitions. [2024-02-02 09:22:47,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 829 transitions, 21495 flow [2024-02-02 09:22:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-02 09:22:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-02 09:22:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 676 transitions. [2024-02-02 09:22:47,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-02-02 09:22:47,147 INFO L175 Difference]: Start difference. First operand has 349 places, 731 transitions, 18382 flow. Second operand 26 states and 676 transitions. [2024-02-02 09:22:47,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 829 transitions, 21495 flow [2024-02-02 09:22:47,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 829 transitions, 20755 flow, removed 67 selfloop flow, removed 25 redundant places. [2024-02-02 09:22:47,601 INFO L231 Difference]: Finished difference. Result has 347 places, 750 transitions, 19651 flow [2024-02-02 09:22:47,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=17636, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=19651, PETRI_PLACES=347, PETRI_TRANSITIONS=750} [2024-02-02 09:22:47,602 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 290 predicate places. [2024-02-02 09:22:47,603 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 750 transitions, 19651 flow [2024-02-02 09:22:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.833333333333332) internal successors, (411), 18 states have internal predecessors, (411), 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 09:22:47,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:47,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:47,615 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 09:22:47,814 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,SelfDestructingSolverStorable42 [2024-02-02 09:22:47,815 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:47,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:47,815 INFO L85 PathProgramCache]: Analyzing trace with hash -953242994, now seen corresponding path program 12 times [2024-02-02 09:22:47,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:47,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482667029] [2024-02-02 09:22:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:47,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:47,899 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 09:22:47,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:47,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482667029] [2024-02-02 09:22:47,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482667029] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:47,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749187379] [2024-02-02 09:22:47,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-02 09:22:47,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:47,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:47,901 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 09:22:47,902 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 09:22:47,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-02 09:22:47,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:47,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:22:47,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:48,072 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 09:22:48,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:48,211 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 09:22:48,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749187379] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:48,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:48,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-02 09:22:48,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627196312] [2024-02-02 09:22:48,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:48,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-02 09:22:48,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:48,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-02 09:22:48,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-02-02 09:22:48,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:48,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 750 transitions, 19651 flow. Second operand has 22 states, 22 states have (on average 22.363636363636363) internal successors, (492), 22 states have internal predecessors, (492), 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 09:22:48,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:48,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:48,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:50,571 INFO L124 PetriNetUnfolderBase]: 2834/5319 cut-off events. [2024-02-02 09:22:50,571 INFO L125 PetriNetUnfolderBase]: For 137342/137359 co-relation queries the response was YES. [2024-02-02 09:22:50,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50623 conditions, 5319 events. 2834/5319 cut-off events. For 137342/137359 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 37475 event pairs, 57 based on Foata normal form. 5/5318 useless extension candidates. Maximal degree in co-relation 50542. Up to 1390 conditions per place. [2024-02-02 09:22:50,717 INFO L140 encePairwiseOnDemand]: 36/55 looper letters, 110 selfloop transitions, 683 changer transitions 334/1132 dead transitions. [2024-02-02 09:22:50,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1132 transitions, 30192 flow [2024-02-02 09:22:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-02-02 09:22:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-02-02 09:22:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 996 transitions. [2024-02-02 09:22:50,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4643356643356643 [2024-02-02 09:22:50,718 INFO L175 Difference]: Start difference. First operand has 347 places, 750 transitions, 19651 flow. Second operand 39 states and 996 transitions. [2024-02-02 09:22:50,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1132 transitions, 30192 flow [2024-02-02 09:22:51,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1132 transitions, 28312 flow, removed 57 selfloop flow, removed 31 redundant places. [2024-02-02 09:22:51,392 INFO L231 Difference]: Finished difference. Result has 356 places, 754 transitions, 19680 flow [2024-02-02 09:22:51,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=18315, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=19680, PETRI_PLACES=356, PETRI_TRANSITIONS=754} [2024-02-02 09:22:51,393 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 299 predicate places. [2024-02-02 09:22:51,393 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 754 transitions, 19680 flow [2024-02-02 09:22:51,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.363636363636363) internal successors, (492), 22 states have internal predecessors, (492), 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 09:22:51,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:51,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:51,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:51,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:51,609 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:51,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1269020140, now seen corresponding path program 13 times [2024-02-02 09:22:51,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:51,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848573286] [2024-02-02 09:22:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:51,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:51,697 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 09:22:51,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848573286] [2024-02-02 09:22:51,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848573286] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134712229] [2024-02-02 09:22:51,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-02 09:22:51,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:51,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:51,698 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 09:22:51,729 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 09:22:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:51,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:22:51,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:51,866 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 09:22:51,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:52,014 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 09:22:52,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134712229] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:52,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:52,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-02 09:22:52,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870662382] [2024-02-02 09:22:52,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:52,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-02 09:22:52,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-02 09:22:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-02-02 09:22:52,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:52,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 754 transitions, 19680 flow. Second operand has 22 states, 22 states have (on average 22.363636363636363) internal successors, (492), 22 states have internal predecessors, (492), 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 09:22:52,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:52,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:52,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:54,645 INFO L124 PetriNetUnfolderBase]: 2848/5359 cut-off events. [2024-02-02 09:22:54,645 INFO L125 PetriNetUnfolderBase]: For 136442/136453 co-relation queries the response was YES. [2024-02-02 09:22:54,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52062 conditions, 5359 events. 2848/5359 cut-off events. For 136442/136453 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 37677 event pairs, 39 based on Foata normal form. 9/5366 useless extension candidates. Maximal degree in co-relation 51987. Up to 1430 conditions per place. [2024-02-02 09:22:54,700 INFO L140 encePairwiseOnDemand]: 37/55 looper letters, 144 selfloop transitions, 716 changer transitions 346/1211 dead transitions. [2024-02-02 09:22:54,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1211 transitions, 32201 flow [2024-02-02 09:22:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-02 09:22:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-02 09:22:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1226 transitions. [2024-02-02 09:22:54,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4643939393939394 [2024-02-02 09:22:54,702 INFO L175 Difference]: Start difference. First operand has 356 places, 754 transitions, 19680 flow. Second operand 48 states and 1226 transitions. [2024-02-02 09:22:54,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1211 transitions, 32201 flow [2024-02-02 09:22:55,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1211 transitions, 30913 flow, removed 151 selfloop flow, removed 16 redundant places. [2024-02-02 09:22:55,498 INFO L231 Difference]: Finished difference. Result has 386 places, 807 transitions, 21819 flow [2024-02-02 09:22:55,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=18878, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=21819, PETRI_PLACES=386, PETRI_TRANSITIONS=807} [2024-02-02 09:22:55,499 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 329 predicate places. [2024-02-02 09:22:55,499 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 807 transitions, 21819 flow [2024-02-02 09:22:55,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.363636363636363) internal successors, (492), 22 states have internal predecessors, (492), 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 09:22:55,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:55,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:55,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:55,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:55,707 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:55,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:55,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2085077768, now seen corresponding path program 14 times [2024-02-02 09:22:55,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:55,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807042270] [2024-02-02 09:22:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:55,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:55,787 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 09:22:55,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:55,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807042270] [2024-02-02 09:22:55,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807042270] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:55,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662210586] [2024-02-02 09:22:55,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:22:55,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:55,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:55,788 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 09:22:55,789 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 09:22:55,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:22:55,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:55,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-02 09:22:55,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:55,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-02 09:22:55,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662210586] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:22:55,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-02 09:22:55,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 14 [2024-02-02 09:22:55,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003049976] [2024-02-02 09:22:55,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:22:55,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-02 09:22:55,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:55,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-02 09:22:55,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-02-02 09:22:56,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 55 [2024-02-02 09:22:56,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 807 transitions, 21819 flow. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 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 09:22:56,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:56,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 55 [2024-02-02 09:22:56,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:56,871 INFO L124 PetriNetUnfolderBase]: 1998/3920 cut-off events. [2024-02-02 09:22:56,871 INFO L125 PetriNetUnfolderBase]: For 111687/111718 co-relation queries the response was YES. [2024-02-02 09:22:56,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39472 conditions, 3920 events. 1998/3920 cut-off events. For 111687/111718 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26853 event pairs, 92 based on Foata normal form. 16/3932 useless extension candidates. Maximal degree in co-relation 39391. Up to 1508 conditions per place. [2024-02-02 09:22:56,913 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 612 selfloop transitions, 177 changer transitions 23/827 dead transitions. [2024-02-02 09:22:56,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 827 transitions, 23680 flow [2024-02-02 09:22:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:22:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:22:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-02-02 09:22:56,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-02-02 09:22:56,914 INFO L175 Difference]: Start difference. First operand has 386 places, 807 transitions, 21819 flow. Second operand 8 states and 245 transitions. [2024-02-02 09:22:56,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 827 transitions, 23680 flow [2024-02-02 09:22:57,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 827 transitions, 23285 flow, removed 71 selfloop flow, removed 21 redundant places. [2024-02-02 09:22:57,360 INFO L231 Difference]: Finished difference. Result has 351 places, 797 transitions, 21609 flow [2024-02-02 09:22:57,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=21446, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21609, PETRI_PLACES=351, PETRI_TRANSITIONS=797} [2024-02-02 09:22:57,361 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 294 predicate places. [2024-02-02 09:22:57,361 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 797 transitions, 21609 flow [2024-02-02 09:22:57,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 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 09:22:57,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:57,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:57,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:57,572 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,SelfDestructingSolverStorable45 [2024-02-02 09:22:57,573 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:22:57,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:57,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1690560082, now seen corresponding path program 15 times [2024-02-02 09:22:57,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:57,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569366311] [2024-02-02 09:22:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:57,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:57,648 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 09:22:57,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:57,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569366311] [2024-02-02 09:22:57,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569366311] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:57,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819249861] [2024-02-02 09:22:57,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-02 09:22:57,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:57,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:57,651 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 09:22:57,653 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 09:22:57,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-02 09:22:57,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:22:57,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-02 09:22:57,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:22:57,793 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 09:22:57,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:22:57,857 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 09:22:57,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819249861] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:22:57,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:22:57,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2024-02-02 09:22:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370294313] [2024-02-02 09:22:57,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:22:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-02 09:22:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:22:57,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-02 09:22:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-02-02 09:22:58,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:22:58,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 797 transitions, 21609 flow. Second operand has 18 states, 18 states have (on average 22.77777777777778) internal successors, (410), 18 states have internal predecessors, (410), 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 09:22:58,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:22:58,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:22:58,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:22:59,439 INFO L124 PetriNetUnfolderBase]: 2136/4139 cut-off events. [2024-02-02 09:22:59,439 INFO L125 PetriNetUnfolderBase]: For 106794/106805 co-relation queries the response was YES. [2024-02-02 09:22:59,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40168 conditions, 4139 events. 2136/4139 cut-off events. For 106794/106805 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 28058 event pairs, 51 based on Foata normal form. 5/4140 useless extension candidates. Maximal degree in co-relation 40097. Up to 1074 conditions per place. [2024-02-02 09:22:59,470 INFO L140 encePairwiseOnDemand]: 41/55 looper letters, 77 selfloop transitions, 121 changer transitions 676/879 dead transitions. [2024-02-02 09:22:59,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 879 transitions, 24310 flow [2024-02-02 09:22:59,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-02 09:22:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-02 09:22:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 622 transitions. [2024-02-02 09:22:59,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45236363636363636 [2024-02-02 09:22:59,471 INFO L175 Difference]: Start difference. First operand has 351 places, 797 transitions, 21609 flow. Second operand 25 states and 622 transitions. [2024-02-02 09:22:59,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 879 transitions, 24310 flow [2024-02-02 09:22:59,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 879 transitions, 23794 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-02-02 09:22:59,909 INFO L231 Difference]: Finished difference. Result has 365 places, 186 transitions, 4138 flow [2024-02-02 09:22:59,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=21098, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4138, PETRI_PLACES=365, PETRI_TRANSITIONS=186} [2024-02-02 09:22:59,910 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 308 predicate places. [2024-02-02 09:22:59,910 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 186 transitions, 4138 flow [2024-02-02 09:22:59,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.77777777777778) internal successors, (410), 18 states have internal predecessors, (410), 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 09:22:59,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:59,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:59,922 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 09:23:00,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:00,113 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:23:00,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:00,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1606940916, now seen corresponding path program 16 times [2024-02-02 09:23:00,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:00,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547989066] [2024-02-02 09:23:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:00,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:00,229 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 09:23:00,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:00,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547989066] [2024-02-02 09:23:00,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547989066] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:23:00,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740169045] [2024-02-02 09:23:00,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-02 09:23:00,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:00,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:23:00,230 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 09:23:00,232 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 09:23:00,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-02 09:23:00,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:23:00,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-02 09:23:00,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:23:00,409 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 09:23:00,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:23:00,552 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 09:23:00,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740169045] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:23:00,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:23:00,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-02 09:23:00,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054511976] [2024-02-02 09:23:00,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:23:00,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-02 09:23:00,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:00,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-02 09:23:00,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-02-02 09:23:00,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:23:00,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 186 transitions, 4138 flow. Second operand has 22 states, 22 states have (on average 22.545454545454547) internal successors, (496), 22 states have internal predecessors, (496), 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 09:23:00,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:00,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:23:00,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:01,321 INFO L124 PetriNetUnfolderBase]: 416/996 cut-off events. [2024-02-02 09:23:01,321 INFO L125 PetriNetUnfolderBase]: For 20160/20171 co-relation queries the response was YES. [2024-02-02 09:23:01,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7932 conditions, 996 events. 416/996 cut-off events. For 20160/20171 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5265 event pairs, 25 based on Foata normal form. 3/995 useless extension candidates. Maximal degree in co-relation 7860. Up to 219 conditions per place. [2024-02-02 09:23:01,328 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 40 selfloop transitions, 39 changer transitions 140/224 dead transitions. [2024-02-02 09:23:01,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 224 transitions, 4718 flow [2024-02-02 09:23:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-02 09:23:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-02 09:23:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 450 transitions. [2024-02-02 09:23:01,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-02-02 09:23:01,329 INFO L175 Difference]: Start difference. First operand has 365 places, 186 transitions, 4138 flow. Second operand 18 states and 450 transitions. [2024-02-02 09:23:01,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 224 transitions, 4718 flow [2024-02-02 09:23:01,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 224 transitions, 3193 flow, removed 52 selfloop flow, removed 82 redundant places. [2024-02-02 09:23:01,367 INFO L231 Difference]: Finished difference. Result has 225 places, 68 transitions, 863 flow [2024-02-02 09:23:01,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2627, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=863, PETRI_PLACES=225, PETRI_TRANSITIONS=68} [2024-02-02 09:23:01,367 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 168 predicate places. [2024-02-02 09:23:01,367 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 68 transitions, 863 flow [2024-02-02 09:23:01,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.545454545454547) internal successors, (496), 22 states have internal predecessors, (496), 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 09:23:01,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:01,368 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:01,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-02-02 09:23:01,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:01,568 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:23:01,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash -850252394, now seen corresponding path program 17 times [2024-02-02 09:23:01,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:01,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884846177] [2024-02-02 09:23:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:01,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:23:01,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:01,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884846177] [2024-02-02 09:23:01,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884846177] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:23:01,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774643905] [2024-02-02 09:23:01,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-02 09:23:01,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:01,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:23:01,613 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 09:23:01,617 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 09:23:01,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-02 09:23:01,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:23:01,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-02 09:23:01,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:23:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:23:01,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:23:01,752 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 09:23:01,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774643905] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:23:01,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:23:01,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-02-02 09:23:01,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108711664] [2024-02-02 09:23:01,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:23:01,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-02 09:23:01,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:01,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-02 09:23:01,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-02-02 09:23:01,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-02-02 09:23:01,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 68 transitions, 863 flow. Second operand has 11 states, 11 states have (on average 25.818181818181817) internal successors, (284), 11 states have internal predecessors, (284), 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 09:23:01,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:01,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-02-02 09:23:01,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:01,943 INFO L124 PetriNetUnfolderBase]: 131/336 cut-off events. [2024-02-02 09:23:01,943 INFO L125 PetriNetUnfolderBase]: For 2784/2784 co-relation queries the response was YES. [2024-02-02 09:23:01,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1953 conditions, 336 events. 131/336 cut-off events. For 2784/2784 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1154 event pairs, 32 based on Foata normal form. 4/339 useless extension candidates. Maximal degree in co-relation 1908. Up to 97 conditions per place. [2024-02-02 09:23:01,945 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 61 selfloop transitions, 20 changer transitions 15/101 dead transitions. [2024-02-02 09:23:01,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 101 transitions, 1270 flow [2024-02-02 09:23:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-02 09:23:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-02 09:23:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 309 transitions. [2024-02-02 09:23:01,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107438016528926 [2024-02-02 09:23:01,946 INFO L175 Difference]: Start difference. First operand has 225 places, 68 transitions, 863 flow. Second operand 11 states and 309 transitions. [2024-02-02 09:23:01,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 101 transitions, 1270 flow [2024-02-02 09:23:01,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 101 transitions, 765 flow, removed 17 selfloop flow, removed 65 redundant places. [2024-02-02 09:23:01,952 INFO L231 Difference]: Finished difference. Result has 117 places, 63 transitions, 415 flow [2024-02-02 09:23:01,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=415, PETRI_PLACES=117, PETRI_TRANSITIONS=63} [2024-02-02 09:23:01,953 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2024-02-02 09:23:01,953 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 63 transitions, 415 flow [2024-02-02 09:23:01,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.818181818181817) internal successors, (284), 11 states have internal predecessors, (284), 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 09:23:01,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:23:01,953 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:01,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-02 09:23:02,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:02,165 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 35 more)] === [2024-02-02 09:23:02,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:23:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1395652548, now seen corresponding path program 18 times [2024-02-02 09:23:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:23:02,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028828573] [2024-02-02 09:23:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:23:02,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:23:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:23:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:23:02,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:23:02,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028828573] [2024-02-02 09:23:02,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028828573] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:23:02,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239064062] [2024-02-02 09:23:02,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-02 09:23:02,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:23:02,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:23:02,264 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:23:02,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-02 09:23:02,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-02 09:23:02,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:23:02,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-02 09:23:02,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:23:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-02 09:23:02,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:23:02,491 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 09:23:02,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239064062] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:23:02,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:23:02,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 18 [2024-02-02 09:23:02,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566012684] [2024-02-02 09:23:02,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:23:02,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-02 09:23:02,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:23:02,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-02 09:23:02,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-02-02 09:23:02,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-02-02 09:23:02,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 63 transitions, 415 flow. Second operand has 19 states, 19 states have (on average 23.105263157894736) internal successors, (439), 19 states have internal predecessors, (439), 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 09:23:02,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:23:02,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-02-02 09:23:02,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:23:03,106 INFO L124 PetriNetUnfolderBase]: 117/293 cut-off events. [2024-02-02 09:23:03,107 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2024-02-02 09:23:03,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 293 events. 117/293 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 954 event pairs, 15 based on Foata normal form. 2/295 useless extension candidates. Maximal degree in co-relation 1126. Up to 56 conditions per place. [2024-02-02 09:23:03,108 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 0 selfloop transitions, 0 changer transitions 89/89 dead transitions. [2024-02-02 09:23:03,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 89 transitions, 685 flow [2024-02-02 09:23:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-02 09:23:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-02 09:23:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 365 transitions. [2024-02-02 09:23:03,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2024-02-02 09:23:03,109 INFO L175 Difference]: Start difference. First operand has 117 places, 63 transitions, 415 flow. Second operand 15 states and 365 transitions. [2024-02-02 09:23:03,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 89 transitions, 685 flow [2024-02-02 09:23:03,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 89 transitions, 633 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-02-02 09:23:03,111 INFO L231 Difference]: Finished difference. Result has 115 places, 0 transitions, 0 flow [2024-02-02 09:23:03,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=115, PETRI_TRANSITIONS=0} [2024-02-02 09:23:03,111 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2024-02-02 09:23:03,112 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 0 transitions, 0 flow [2024-02-02 09:23:03,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.105263157894736) internal successors, (439), 19 states have internal predecessors, (439), 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 09:23:03,114 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 38 remaining) [2024-02-02 09:23:03,114 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 38 remaining) [2024-02-02 09:23:03,115 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 38 remaining) [2024-02-02 09:23:03,115 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 38 remaining) [2024-02-02 09:23:03,115 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 38 remaining) [2024-02-02 09:23:03,115 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 38 remaining) [2024-02-02 09:23:03,115 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 38 remaining) [2024-02-02 09:23:03,115 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 38 remaining) [2024-02-02 09:23:03,115 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 38 remaining) [2024-02-02 09:23:03,115 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 38 remaining) [2024-02-02 09:23:03,115 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 38 remaining) [2024-02-02 09:23:03,116 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 38 remaining) [2024-02-02 09:23:03,116 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 38 remaining) [2024-02-02 09:23:03,116 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 38 remaining) [2024-02-02 09:23:03,116 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 38 remaining) [2024-02-02 09:23:03,116 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err7ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 38 remaining) [2024-02-02 09:23:03,116 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 38 remaining) [2024-02-02 09:23:03,116 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 38 remaining) [2024-02-02 09:23:03,116 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 38 remaining) [2024-02-02 09:23:03,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (18 of 38 remaining) [2024-02-02 09:23:03,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 38 remaining) [2024-02-02 09:23:03,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 38 remaining) [2024-02-02 09:23:03,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 38 remaining) [2024-02-02 09:23:03,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 38 remaining) [2024-02-02 09:23:03,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 38 remaining) [2024-02-02 09:23:03,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 38 remaining) [2024-02-02 09:23:03,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 38 remaining) [2024-02-02 09:23:03,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 38 remaining) [2024-02-02 09:23:03,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 38 remaining) [2024-02-02 09:23:03,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err7ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 38 remaining) [2024-02-02 09:23:03,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 38 remaining) [2024-02-02 09:23:03,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 38 remaining) [2024-02-02 09:23:03,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 38 remaining) [2024-02-02 09:23:03,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 38 remaining) [2024-02-02 09:23:03,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 38 remaining) [2024-02-02 09:23:03,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 38 remaining) [2024-02-02 09:23:03,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 38 remaining) [2024-02-02 09:23:03,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err7ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 38 remaining) [2024-02-02 09:23:03,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-02 09:23:03,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-02-02 09:23:03,333 INFO L445 BasicCegarLoop]: Path program histogram: [18, 12, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:23:03,337 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-02 09:23:03,337 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-02 09:23:03,341 INFO L503 ceAbstractionStarter]: Automizer considered 19 witness invariants [2024-02-02 09:23:03,341 INFO L504 ceAbstractionStarter]: WitnessConsidered=19 [2024-02-02 09:23:03,342 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 09:23:03 BasicIcfg [2024-02-02 09:23:03,342 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-02 09:23:03,343 INFO L158 Benchmark]: Toolchain (without parser) took 55534.96ms. Allocated memory was 157.3MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 122.8MB in the beginning and 578.4MB in the end (delta: -455.7MB). Peak memory consumption was 579.9MB. Max. memory is 16.1GB. [2024-02-02 09:23:03,343 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory was 88.2MB in the beginning and 88.1MB in the end (delta: 120.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-02 09:23:03,343 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 157.3MB. Free memory is still 126.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-02 09:23:03,344 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.96ms. Allocated memory is still 157.3MB. Free memory was 122.8MB in the beginning and 107.4MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-02-02 09:23:03,344 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.79ms. Allocated memory is still 157.3MB. Free memory was 107.4MB in the beginning and 106.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-02 09:23:03,347 INFO L158 Benchmark]: Boogie Preprocessor took 59.28ms. Allocated memory is still 157.3MB. Free memory was 106.0MB in the beginning and 103.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-02 09:23:03,347 INFO L158 Benchmark]: RCFGBuilder took 470.04ms. Allocated memory is still 157.3MB. Free memory was 103.9MB in the beginning and 75.3MB in the end (delta: 28.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-02-02 09:23:03,348 INFO L158 Benchmark]: TraceAbstraction took 54698.45ms. Allocated memory was 157.3MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 74.5MB in the beginning and 578.4MB in the end (delta: -503.9MB). Peak memory consumption was 531.7MB. Max. memory is 16.1GB. [2024-02-02 09:23:03,349 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory was 88.2MB in the beginning and 88.1MB in the end (delta: 120.4kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 157.3MB. Free memory is still 126.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.96ms. Allocated memory is still 157.3MB. Free memory was 122.8MB in the beginning and 107.4MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.79ms. Allocated memory is still 157.3MB. Free memory was 107.4MB in the beginning and 106.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.28ms. Allocated memory is still 157.3MB. Free memory was 106.0MB in the beginning and 103.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 470.04ms. Allocated memory is still 157.3MB. Free memory was 103.9MB in the beginning and 75.3MB in the end (delta: 28.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 54698.45ms. Allocated memory was 157.3MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 74.5MB in the beginning and 578.4MB in the end (delta: -503.9MB). Peak memory consumption was 531.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 43]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 44]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 46]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 43]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 47]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 48]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 50]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 55]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 56]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 57]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 59]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 56]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 61]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 63]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 69]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 70]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 73]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 79]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 92 locations, 38 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 54.6s, OverallIterations: 50, TraceHistogramMax: 2, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 40.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8488 SdHoareTripleChecker+Valid, 15.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7621 mSDsluCounter, 5010 SdHoareTripleChecker+Invalid, 12.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4679 mSDsCounter, 968 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38878 IncrementalHoareTripleChecker+Invalid, 39846 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 968 mSolverCounterUnsat, 331 mSDtfsCounter, 38878 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2067 GetRequests, 1128 SyntacticMatches, 18 SemanticMatches, 921 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7378 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21819occurred in iteration=45, InterpolantAutomatonStates: 721, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 1979 NumberOfCodeBlocks, 1979 NumberOfCodeBlocksAsserted, 92 NumberOfCheckSat, 2488 ConstructedInterpolants, 0 QuantifiedInterpolants, 12760 SizeOfPredicates, 67 NumberOfNonLiveVariables, 3728 ConjunctsInSsa, 212 ConjunctsInUnsatCore, 88 InterpolantComputations, 33 PerfectInterpolantSequences, 37/154 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 20 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-02 09:23:03,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE