./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 14:52:50,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 14:52:50,167 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 14:52:50,173 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 14:52:50,173 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 14:52:50,186 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 14:52:50,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 14:52:50,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 14:52:50,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 14:52:50,187 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 14:52:50,187 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 14:52:50,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 14:52:50,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 14:52:50,188 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 14:52:50,189 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 14:52:50,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 14:52:50,189 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 14:52:50,189 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 14:52:50,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 14:52:50,190 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 14:52:50,190 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 14:52:50,190 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 14:52:50,191 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 14:52:50,191 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 14:52:50,191 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 14:52:50,192 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 14:52:50,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 14:52:50,192 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 14:52:50,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 14:52:50,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 14:52:50,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 14:52:50,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 14:52:50,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 14:52:50,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 14:52:50,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 14:52:50,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 14:52:50,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 14:52:50,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 14:52:50,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 14:52:50,195 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 14:52:50,195 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 14:52:50,195 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 14:52:50,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 14:52:50,196 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-27 14:52:50,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 14:52:50,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 14:52:50,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 14:52:50,419 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-27 14:52:50,421 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-27 14:52:50,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml [2024-01-27 14:52:50,496 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 14:52:50,497 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 14:52:50,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-01-27 14:52:51,496 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 14:52:51,705 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 14:52:51,706 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-01-27 14:52:51,713 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddcbb38d2/56aed69eb1184d6eb10cd81ddd2b3035/FLAG673c17067 [2024-01-27 14:52:51,732 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddcbb38d2/56aed69eb1184d6eb10cd81ddd2b3035 [2024-01-27 14:52:51,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 14:52:51,735 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-27 14:52:51,737 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 14:52:51,737 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 14:52:51,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 14:52:51,741 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 02:52:50" (1/2) ... [2024-01-27 14:52:51,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559d96d4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:52:51, skipping insertion in model container [2024-01-27 14:52:51,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 02:52:50" (1/2) ... [2024-01-27 14:52:51,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e46889b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 02:52:51, skipping insertion in model container [2024-01-27 14:52:51,744 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 02:52:51" (2/2) ... [2024-01-27 14:52:51,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559d96d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51, skipping insertion in model container [2024-01-27 14:52:51,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 02:52:51" (2/2) ... [2024-01-27 14:52:51,744 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-27 14:52:51,758 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-27 14:52:51,759 INFO L98 nessWitnessExtractor]: Loop invariant at [L41-L43] (unsigned long )_argptr == 0UL [2024-01-27 14:52:51,759 INFO L98 nessWitnessExtractor]: Loop invariant at [L49-L51] (unsigned long )_argptr == 0UL [2024-01-27 14:52:51,759 INFO L98 nessWitnessExtractor]: Location invariant before [L45-L45] (unsigned long )_argptr == 0UL [2024-01-27 14:52:51,760 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] (long long )x1 - (long long )x2 >= 0LL [2024-01-27 14:52:51,760 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] x2 == 0 [2024-01-27 14:52:51,760 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] (long long )x1 + (long long )x2 >= 0LL [2024-01-27 14:52:51,760 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] (0LL - (long long )x1) - (long long )x2 >= 0LL [2024-01-27 14:52:51,760 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] (0LL - (long long )x1) + (long long )x2 >= 0LL [2024-01-27 14:52:51,760 INFO L98 nessWitnessExtractor]: Location invariant before [L59-L59] x1 == 0 [2024-01-27 14:52:51,760 INFO L98 nessWitnessExtractor]: Location invariant before [L50-L50] (unsigned long )_argptr == 0UL [2024-01-27 14:52:51,761 INFO L98 nessWitnessExtractor]: Location invariant before [L53-L53] (unsigned long )_argptr == 0UL [2024-01-27 14:52:51,761 INFO L98 nessWitnessExtractor]: Location invariant before [L60-L60] x2 == 0 [2024-01-27 14:52:51,761 INFO L98 nessWitnessExtractor]: Location invariant before [L22-L25] x2 == 0 [2024-01-27 14:52:51,761 INFO L98 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-01-27 14:52:51,778 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 14:52:51,921 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c[1902,1915] [2024-01-27 14:52:51,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 14:52:51,932 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 14:52:51,939 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 [2024-01-27 14:52:51,968 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c[1902,1915] [2024-01-27 14:52:51,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 14:52:51,980 INFO L206 MainTranslator]: Completed translation [2024-01-27 14:52:51,981 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51 WrapperNode [2024-01-27 14:52:51,981 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 14:52:51,982 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 14:52:51,982 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 14:52:51,982 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 14:52:51,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:51,993 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,013 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-01-27 14:52:52,013 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 14:52:52,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 14:52:52,014 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 14:52:52,014 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 14:52:52,022 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,024 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,033 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]. [2024-01-27 14:52:52,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,034 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,038 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,046 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,047 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,048 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,050 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 14:52:52,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 14:52:52,056 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 14:52:52,056 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 14:52:52,057 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (1/1) ... [2024-01-27 14:52:52,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 14:52:52,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:52:52,080 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) [2024-01-27 14:52:52,095 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 [2024-01-27 14:52:52,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 14:52:52,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 14:52:52,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 14:52:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 14:52:52,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 14:52:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 14:52:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 14:52:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 14:52:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 14:52:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 14:52:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 14:52:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 14:52:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 14:52:52,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 14:52:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 14:52:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 14:52:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 14:52:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 14:52:52,112 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 14:52:52,195 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 14:52:52,196 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 14:52:52,339 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 14:52:52,339 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 14:52:52,432 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 14:52:52,437 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 14:52:52,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 02:52:52 BoogieIcfgContainer [2024-01-27 14:52:52,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 14:52:52,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 14:52:52,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 14:52:52,444 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 14:52:52,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 02:52:50" (1/4) ... [2024-01-27 14:52:52,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbfeef3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 02:52:52, skipping insertion in model container [2024-01-27 14:52:52,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 02:52:51" (2/4) ... [2024-01-27 14:52:52,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbfeef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 02:52:52, skipping insertion in model container [2024-01-27 14:52:52,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 02:52:51" (3/4) ... [2024-01-27 14:52:52,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbfeef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 02:52:52, skipping insertion in model container [2024-01-27 14:52:52,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 02:52:52" (4/4) ... [2024-01-27 14:52:52,448 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2024-01-27 14:52:52,462 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 14:52:52,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-01-27 14:52:52,463 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 14:52:52,540 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 14:52:52,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 49 transitions, 112 flow [2024-01-27 14:52:52,609 INFO L124 PetriNetUnfolderBase]: 2/47 cut-off events. [2024-01-27 14:52:52,610 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 14:52:52,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 2/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-01-27 14:52:52,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 49 transitions, 112 flow [2024-01-27 14:52:52,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 46 transitions, 104 flow [2024-01-27 14:52:52,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 14:52:52,634 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;@144ff4c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 14:52:52,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-01-27 14:52:52,637 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 14:52:52,638 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-27 14:52:52,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 14:52:52,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:52,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-27 14:52:52,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:52,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:52,643 INFO L85 PathProgramCache]: Analyzing trace with hash 8790, now seen corresponding path program 1 times [2024-01-27 14:52:52,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:52,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684512532] [2024-01-27 14:52:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:52,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:52,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:52,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684512532] [2024-01-27 14:52:52,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684512532] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:52,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:52:52,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 14:52:52,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370013690] [2024-01-27 14:52:52,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:52,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:52:52,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:52,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:52:52,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:52:52,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 49 [2024-01-27 14:52:52,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:52,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:52,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 49 [2024-01-27 14:52:52,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:52,991 INFO L124 PetriNetUnfolderBase]: 49/142 cut-off events. [2024-01-27 14:52:52,991 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-27 14:52:52,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 142 events. 49/142 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 610 event pairs, 45 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 196. Up to 98 conditions per place. [2024-01-27 14:52:52,996 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 16 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-01-27 14:52:52,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 138 flow [2024-01-27 14:52:52,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:52:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:52:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-01-27 14:52:53,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7210884353741497 [2024-01-27 14:52:53,008 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 104 flow. Second operand 3 states and 106 transitions. [2024-01-27 14:52:53,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 138 flow [2024-01-27 14:52:53,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 14:52:53,016 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 98 flow [2024-01-27 14:52:53,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-01-27 14:52:53,020 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2024-01-27 14:52:53,020 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 98 flow [2024-01-27 14:52:53,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:53,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-01-27 14:52:53,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 14:52:53,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:53,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash 272726, now seen corresponding path program 1 times [2024-01-27 14:52:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:53,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195889774] [2024-01-27 14:52:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:53,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:53,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:53,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195889774] [2024-01-27 14:52:53,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195889774] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:53,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:52:53,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 14:52:53,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544708708] [2024-01-27 14:52:53,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:53,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:52:53,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:53,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:52:53,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:52:53,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 49 [2024-01-27 14:52:53,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:53,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 49 [2024-01-27 14:52:53,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:53,167 INFO L124 PetriNetUnfolderBase]: 49/140 cut-off events. [2024-01-27 14:52:53,167 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 14:52:53,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 140 events. 49/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 616 event pairs, 45 based on Foata normal form. 2/116 useless extension candidates. Maximal degree in co-relation 231. Up to 98 conditions per place. [2024-01-27 14:52:53,173 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 15 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-01-27 14:52:53,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 128 flow [2024-01-27 14:52:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:52:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:52:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-01-27 14:52:53,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7006802721088435 [2024-01-27 14:52:53,179 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 98 flow. Second operand 3 states and 103 transitions. [2024-01-27 14:52:53,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 128 flow [2024-01-27 14:52:53,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:52:53,180 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 94 flow [2024-01-27 14:52:53,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=3, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-01-27 14:52:53,181 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-01-27 14:52:53,181 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 94 flow [2024-01-27 14:52:53,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:53,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-27 14:52:53,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 14:52:53,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:53,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash 8454753, now seen corresponding path program 1 times [2024-01-27 14:52:53,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:53,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019623389] [2024-01-27 14:52:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:53,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:53,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:53,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019623389] [2024-01-27 14:52:53,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019623389] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:53,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:52:53,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 14:52:53,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391045993] [2024-01-27 14:52:53,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:53,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:52:53,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:53,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:52:53,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:52:53,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 49 [2024-01-27 14:52:53,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:53,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 49 [2024-01-27 14:52:53,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:53,277 INFO L124 PetriNetUnfolderBase]: 49/138 cut-off events. [2024-01-27 14:52:53,277 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 14:52:53,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 138 events. 49/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 620 event pairs, 45 based on Foata normal form. 2/115 useless extension candidates. Maximal degree in co-relation 231. Up to 98 conditions per place. [2024-01-27 14:52:53,278 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 15 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-01-27 14:52:53,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 124 flow [2024-01-27 14:52:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:52:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:52:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-01-27 14:52:53,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7006802721088435 [2024-01-27 14:52:53,279 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 94 flow. Second operand 3 states and 103 transitions. [2024-01-27 14:52:53,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 124 flow [2024-01-27 14:52:53,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:52:53,280 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 90 flow [2024-01-27 14:52:53,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-01-27 14:52:53,281 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2024-01-27 14:52:53,281 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 90 flow [2024-01-27 14:52:53,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:53,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-27 14:52:53,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 14:52:53,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:53,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:53,282 INFO L85 PathProgramCache]: Analyzing trace with hash -464908527, now seen corresponding path program 1 times [2024-01-27 14:52:53,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:53,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810607779] [2024-01-27 14:52:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:53,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:53,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:53,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810607779] [2024-01-27 14:52:53,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810607779] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:53,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:52:53,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 14:52:53,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994945462] [2024-01-27 14:52:53,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:53,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:52:53,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:53,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:52:53,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:52:53,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 49 [2024-01-27 14:52:53,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:53,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 49 [2024-01-27 14:52:53,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:53,373 INFO L124 PetriNetUnfolderBase]: 49/136 cut-off events. [2024-01-27 14:52:53,373 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 14:52:53,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 136 events. 49/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 610 event pairs, 45 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 230. Up to 97 conditions per place. [2024-01-27 14:52:53,374 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 16 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-01-27 14:52:53,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 122 flow [2024-01-27 14:52:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:52:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:52:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-01-27 14:52:53,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074829931972789 [2024-01-27 14:52:53,375 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 90 flow. Second operand 3 states and 104 transitions. [2024-01-27 14:52:53,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 122 flow [2024-01-27 14:52:53,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:52:53,376 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 86 flow [2024-01-27 14:52:53,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-01-27 14:52:53,377 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -9 predicate places. [2024-01-27 14:52:53,377 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 86 flow [2024-01-27 14:52:53,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:53,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:52:53,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 14:52:53,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:53,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:53,378 INFO L85 PathProgramCache]: Analyzing trace with hash -17228898, now seen corresponding path program 1 times [2024-01-27 14:52:53,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:53,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675894765] [2024-01-27 14:52:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:53,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:53,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:53,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675894765] [2024-01-27 14:52:53,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675894765] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:53,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:52:53,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 14:52:53,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988753316] [2024-01-27 14:52:53,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:53,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:52:53,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:52:53,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:52:53,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 49 [2024-01-27 14:52:53,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:53,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 49 [2024-01-27 14:52:53,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:53,563 INFO L124 PetriNetUnfolderBase]: 82/198 cut-off events. [2024-01-27 14:52:53,564 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 14:52:53,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 198 events. 82/198 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 792 event pairs, 27 based on Foata normal form. 20/203 useless extension candidates. Maximal degree in co-relation 333. Up to 124 conditions per place. [2024-01-27 14:52:53,568 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 22 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-01-27 14:52:53,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 139 flow [2024-01-27 14:52:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 14:52:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 14:52:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-01-27 14:52:53,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-01-27 14:52:53,585 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 86 flow. Second operand 4 states and 132 transitions. [2024-01-27 14:52:53,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 139 flow [2024-01-27 14:52:53,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 41 transitions, 135 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:52:53,587 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 78 flow [2024-01-27 14:52:53,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-01-27 14:52:53,590 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -12 predicate places. [2024-01-27 14:52:53,590 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 78 flow [2024-01-27 14:52:53,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:53,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:52:53,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 14:52:53,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:53,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:53,591 INFO L85 PathProgramCache]: Analyzing trace with hash 621738047, now seen corresponding path program 1 times [2024-01-27 14:52:53,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:53,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879153085] [2024-01-27 14:52:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:53,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:53,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:53,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879153085] [2024-01-27 14:52:53,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879153085] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:53,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:52:53,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 14:52:53,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741711121] [2024-01-27 14:52:53,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:53,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:52:53,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:53,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:52:53,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:52:53,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 49 [2024-01-27 14:52:53,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:53,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 49 [2024-01-27 14:52:53,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:53,777 INFO L124 PetriNetUnfolderBase]: 68/160 cut-off events. [2024-01-27 14:52:53,777 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 14:52:53,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 160 events. 68/160 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 615 event pairs, 3 based on Foata normal form. 20/178 useless extension candidates. Maximal degree in co-relation 270. Up to 90 conditions per place. [2024-01-27 14:52:53,778 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 25 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-01-27 14:52:53,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 143 flow [2024-01-27 14:52:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 14:52:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 14:52:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-01-27 14:52:53,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2024-01-27 14:52:53,779 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 78 flow. Second operand 4 states and 135 transitions. [2024-01-27 14:52:53,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 143 flow [2024-01-27 14:52:53,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:52:53,793 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 71 flow [2024-01-27 14:52:53,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-01-27 14:52:53,794 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -15 predicate places. [2024-01-27 14:52:53,794 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 71 flow [2024-01-27 14:52:53,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:53,794 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] [2024-01-27 14:52:53,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 14:52:53,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:53,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:53,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1385721167, now seen corresponding path program 1 times [2024-01-27 14:52:53,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:53,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25258462] [2024-01-27 14:52:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:53,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:53,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:53,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25258462] [2024-01-27 14:52:53,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25258462] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:53,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:52:53,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 14:52:53,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479988903] [2024-01-27 14:52:53,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:53,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 14:52:53,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:53,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 14:52:53,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 14:52:53,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 49 [2024-01-27 14:52:53,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:53,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 49 [2024-01-27 14:52:53,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:53,928 INFO L124 PetriNetUnfolderBase]: 113/244 cut-off events. [2024-01-27 14:52:53,929 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-01-27 14:52:53,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 244 events. 113/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 995 event pairs, 24 based on Foata normal form. 1/231 useless extension candidates. Maximal degree in co-relation 437. Up to 137 conditions per place. [2024-01-27 14:52:53,930 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 23 selfloop transitions, 5 changer transitions 1/43 dead transitions. [2024-01-27 14:52:53,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 158 flow [2024-01-27 14:52:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 14:52:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 14:52:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2024-01-27 14:52:53,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7959183673469388 [2024-01-27 14:52:53,931 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 71 flow. Second operand 3 states and 117 transitions. [2024-01-27 14:52:53,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 158 flow [2024-01-27 14:52:53,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 43 transitions, 153 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 14:52:53,933 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 93 flow [2024-01-27 14:52:53,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-01-27 14:52:53,934 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -14 predicate places. [2024-01-27 14:52:53,934 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 93 flow [2024-01-27 14:52:53,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:53,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:53,934 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] [2024-01-27 14:52:53,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 14:52:53,935 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:53,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1631295226, now seen corresponding path program 1 times [2024-01-27 14:52:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:53,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722132505] [2024-01-27 14:52:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:53,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:53,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722132505] [2024-01-27 14:52:53,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722132505] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:53,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:52:53,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 14:52:53,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712816679] [2024-01-27 14:52:53,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:53,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:52:53,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:53,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:52:53,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:52:54,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 49 [2024-01-27 14:52:54,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:54,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:54,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 49 [2024-01-27 14:52:54,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:54,073 INFO L124 PetriNetUnfolderBase]: 197/380 cut-off events. [2024-01-27 14:52:54,073 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-01-27 14:52:54,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 380 events. 197/380 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1651 event pairs, 35 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 807. Up to 157 conditions per place. [2024-01-27 14:52:54,075 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 41 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2024-01-27 14:52:54,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 274 flow [2024-01-27 14:52:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 14:52:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 14:52:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-01-27 14:52:54,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6693877551020408 [2024-01-27 14:52:54,076 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 93 flow. Second operand 5 states and 164 transitions. [2024-01-27 14:52:54,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 274 flow [2024-01-27 14:52:54,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 61 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 14:52:54,077 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 158 flow [2024-01-27 14:52:54,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2024-01-27 14:52:54,077 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -8 predicate places. [2024-01-27 14:52:54,078 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 158 flow [2024-01-27 14:52:54,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:54,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:54,078 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] [2024-01-27 14:52:54,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 14:52:54,078 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:54,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:54,078 INFO L85 PathProgramCache]: Analyzing trace with hash 806434952, now seen corresponding path program 2 times [2024-01-27 14:52:54,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:54,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139471375] [2024-01-27 14:52:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:54,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:54,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:54,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139471375] [2024-01-27 14:52:54,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139471375] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:52:54,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469039100] [2024-01-27 14:52:54,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 14:52:54,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:52:54,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:52:54,122 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) [2024-01-27 14:52:54,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 14:52:54,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 14:52:54,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:52:54,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 14:52:54,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:52:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:54,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:52:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:54,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469039100] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 14:52:54,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 14:52:54,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 5] total 11 [2024-01-27 14:52:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507773566] [2024-01-27 14:52:54,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:54,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 14:52:54,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 14:52:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-01-27 14:52:54,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 49 [2024-01-27 14:52:54,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:54,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:54,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 49 [2024-01-27 14:52:54,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:54,631 INFO L124 PetriNetUnfolderBase]: 309/620 cut-off events. [2024-01-27 14:52:54,631 INFO L125 PetriNetUnfolderBase]: For 495/495 co-relation queries the response was YES. [2024-01-27 14:52:54,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 620 events. 309/620 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2981 event pairs, 30 based on Foata normal form. 25/633 useless extension candidates. Maximal degree in co-relation 1572. Up to 191 conditions per place. [2024-01-27 14:52:54,634 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 71 selfloop transitions, 24 changer transitions 5/109 dead transitions. [2024-01-27 14:52:54,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 109 transitions, 583 flow [2024-01-27 14:52:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 14:52:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 14:52:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 276 transitions. [2024-01-27 14:52:54,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2024-01-27 14:52:54,636 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 158 flow. Second operand 8 states and 276 transitions. [2024-01-27 14:52:54,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 109 transitions, 583 flow [2024-01-27 14:52:54,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 109 transitions, 583 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 14:52:54,640 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 341 flow [2024-01-27 14:52:54,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-01-27 14:52:54,641 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2024-01-27 14:52:54,641 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 341 flow [2024-01-27 14:52:54,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:54,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:54,641 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] [2024-01-27 14:52:54,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 14:52:54,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:52:54,853 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:54,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:54,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2010778053, now seen corresponding path program 1 times [2024-01-27 14:52:54,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:54,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483803595] [2024-01-27 14:52:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:54,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:54,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:54,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483803595] [2024-01-27 14:52:54,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483803595] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:54,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:52:54,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 14:52:54,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256478153] [2024-01-27 14:52:54,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:54,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:52:54,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:54,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:52:54,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:52:54,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-01-27 14:52:54,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 341 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:54,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:54,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-01-27 14:52:54,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:55,022 INFO L124 PetriNetUnfolderBase]: 327/686 cut-off events. [2024-01-27 14:52:55,022 INFO L125 PetriNetUnfolderBase]: For 1896/1904 co-relation queries the response was YES. [2024-01-27 14:52:55,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 686 events. 327/686 cut-off events. For 1896/1904 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3565 event pairs, 57 based on Foata normal form. 26/705 useless extension candidates. Maximal degree in co-relation 2232. Up to 219 conditions per place. [2024-01-27 14:52:55,026 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 61 selfloop transitions, 17 changer transitions 3/89 dead transitions. [2024-01-27 14:52:55,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 697 flow [2024-01-27 14:52:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 14:52:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 14:52:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-01-27 14:52:55,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6693877551020408 [2024-01-27 14:52:55,028 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 341 flow. Second operand 5 states and 164 transitions. [2024-01-27 14:52:55,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 697 flow [2024-01-27 14:52:55,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 687 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-01-27 14:52:55,033 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 472 flow [2024-01-27 14:52:55,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=472, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-01-27 14:52:55,034 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-01-27 14:52:55,034 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 472 flow [2024-01-27 14:52:55,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:55,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:55,034 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] [2024-01-27 14:52:55,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 14:52:55,034 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:55,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1552177975, now seen corresponding path program 2 times [2024-01-27 14:52:55,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:55,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014220511] [2024-01-27 14:52:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:55,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:55,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014220511] [2024-01-27 14:52:55,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014220511] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:55,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 14:52:55,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 14:52:55,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489594563] [2024-01-27 14:52:55,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:55,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 14:52:55,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 14:52:55,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 14:52:55,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-01-27 14:52:55,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 472 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:55,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:55,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-01-27 14:52:55,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:55,184 INFO L124 PetriNetUnfolderBase]: 257/518 cut-off events. [2024-01-27 14:52:55,197 INFO L125 PetriNetUnfolderBase]: For 2292/2292 co-relation queries the response was YES. [2024-01-27 14:52:55,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 518 events. 257/518 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2334 event pairs, 36 based on Foata normal form. 14/529 useless extension candidates. Maximal degree in co-relation 1990. Up to 327 conditions per place. [2024-01-27 14:52:55,201 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 52 selfloop transitions, 20 changer transitions 0/80 dead transitions. [2024-01-27 14:52:55,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 710 flow [2024-01-27 14:52:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 14:52:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 14:52:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-01-27 14:52:55,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-01-27 14:52:55,202 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 472 flow. Second operand 5 states and 155 transitions. [2024-01-27 14:52:55,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 710 flow [2024-01-27 14:52:55,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 682 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-01-27 14:52:55,209 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 541 flow [2024-01-27 14:52:55,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=541, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-01-27 14:52:55,211 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2024-01-27 14:52:55,211 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 541 flow [2024-01-27 14:52:55,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:55,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:55,211 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] [2024-01-27 14:52:55,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-27 14:52:55,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:55,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:55,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1468527160, now seen corresponding path program 1 times [2024-01-27 14:52:55,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:55,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038911820] [2024-01-27 14:52:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:55,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:55,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:55,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038911820] [2024-01-27 14:52:55,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038911820] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:52:55,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225587522] [2024-01-27 14:52:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:55,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:52:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:52:55,349 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) [2024-01-27 14:52:55,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 14:52:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:55,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 14:52:55,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:52:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:55,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:52:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:55,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225587522] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:52:55,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:52:55,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-01-27 14:52:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438725764] [2024-01-27 14:52:55,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:52:55,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 14:52:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 14:52:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-01-27 14:52:55,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-01-27 14:52:55,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 541 flow. Second operand has 17 states, 17 states have (on average 24.823529411764707) internal successors, (422), 17 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:55,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:55,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-01-27 14:52:55,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:56,052 INFO L124 PetriNetUnfolderBase]: 461/938 cut-off events. [2024-01-27 14:52:56,053 INFO L125 PetriNetUnfolderBase]: For 5696/5696 co-relation queries the response was YES. [2024-01-27 14:52:56,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3903 conditions, 938 events. 461/938 cut-off events. For 5696/5696 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4998 event pairs, 32 based on Foata normal form. 30/965 useless extension candidates. Maximal degree in co-relation 3840. Up to 243 conditions per place. [2024-01-27 14:52:56,059 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 87 selfloop transitions, 65 changer transitions 37/197 dead transitions. [2024-01-27 14:52:56,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 197 transitions, 1791 flow [2024-01-27 14:52:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 14:52:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 14:52:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 612 transitions. [2024-01-27 14:52:56,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947521865889213 [2024-01-27 14:52:56,061 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 541 flow. Second operand 21 states and 612 transitions. [2024-01-27 14:52:56,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 197 transitions, 1791 flow [2024-01-27 14:52:56,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 197 transitions, 1763 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-01-27 14:52:56,070 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 1229 flow [2024-01-27 14:52:56,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1229, PETRI_PLACES=105, PETRI_TRANSITIONS=98} [2024-01-27 14:52:56,071 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 54 predicate places. [2024-01-27 14:52:56,071 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 1229 flow [2024-01-27 14:52:56,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 24.823529411764707) internal successors, (422), 17 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:56,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:56,072 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] [2024-01-27 14:52:56,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 14:52:56,283 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,SelfDestructingSolverStorable11 [2024-01-27 14:52:56,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:56,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:56,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1479044280, now seen corresponding path program 2 times [2024-01-27 14:52:56,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:56,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197481700] [2024-01-27 14:52:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:56,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:56,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197481700] [2024-01-27 14:52:56,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197481700] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:52:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992922362] [2024-01-27 14:52:56,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 14:52:56,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:52:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:52:56,375 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) [2024-01-27 14:52:56,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 14:52:56,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 14:52:56,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:52:56,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 14:52:56,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:52:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:56,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 14:52:56,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992922362] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:56,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 14:52:56,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2024-01-27 14:52:56,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073560407] [2024-01-27 14:52:56,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:56,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 14:52:56,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:56,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 14:52:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 14:52:56,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 49 [2024-01-27 14:52:56,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 98 transitions, 1229 flow. Second operand has 8 states, 8 states have (on average 25.75) internal successors, (206), 8 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:56,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:56,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 49 [2024-01-27 14:52:56,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:56,692 INFO L124 PetriNetUnfolderBase]: 461/955 cut-off events. [2024-01-27 14:52:56,693 INFO L125 PetriNetUnfolderBase]: For 10105/10105 co-relation queries the response was YES. [2024-01-27 14:52:56,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4962 conditions, 955 events. 461/955 cut-off events. For 10105/10105 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5141 event pairs, 190 based on Foata normal form. 3/951 useless extension candidates. Maximal degree in co-relation 4893. Up to 535 conditions per place. [2024-01-27 14:52:56,700 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 63 selfloop transitions, 56 changer transitions 20/148 dead transitions. [2024-01-27 14:52:56,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 2064 flow [2024-01-27 14:52:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 14:52:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 14:52:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-01-27 14:52:56,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5969387755102041 [2024-01-27 14:52:56,702 INFO L175 Difference]: Start difference. First operand has 105 places, 98 transitions, 1229 flow. Second operand 8 states and 234 transitions. [2024-01-27 14:52:56,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 2064 flow [2024-01-27 14:52:56,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 1834 flow, removed 109 selfloop flow, removed 5 redundant places. [2024-01-27 14:52:56,737 INFO L231 Difference]: Finished difference. Result has 110 places, 119 transitions, 1523 flow [2024-01-27 14:52:56,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1523, PETRI_PLACES=110, PETRI_TRANSITIONS=119} [2024-01-27 14:52:56,738 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 59 predicate places. [2024-01-27 14:52:56,738 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 119 transitions, 1523 flow [2024-01-27 14:52:56,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.75) internal successors, (206), 8 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:56,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:56,739 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] [2024-01-27 14:52:56,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 14:52:56,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:52:56,952 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:56,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:56,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1073626930, now seen corresponding path program 3 times [2024-01-27 14:52:56,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:56,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132001748] [2024-01-27 14:52:56,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:56,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:57,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:57,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132001748] [2024-01-27 14:52:57,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132001748] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:52:57,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327884997] [2024-01-27 14:52:57,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 14:52:57,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:52:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:52:57,074 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) [2024-01-27 14:52:57,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 14:52:57,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 14:52:57,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:52:57,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 14:52:57,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:52:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:57,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 14:52:57,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327884997] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:52:57,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 14:52:57,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2024-01-27 14:52:57,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350054790] [2024-01-27 14:52:57,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:52:57,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 14:52:57,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 14:52:57,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-01-27 14:52:57,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-01-27 14:52:57,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 119 transitions, 1523 flow. Second operand has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:57,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:57,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-01-27 14:52:57,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:57,380 INFO L124 PetriNetUnfolderBase]: 428/894 cut-off events. [2024-01-27 14:52:57,381 INFO L125 PetriNetUnfolderBase]: For 9610/9628 co-relation queries the response was YES. [2024-01-27 14:52:57,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4657 conditions, 894 events. 428/894 cut-off events. For 9610/9628 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4757 event pairs, 24 based on Foata normal form. 6/895 useless extension candidates. Maximal degree in co-relation 4599. Up to 202 conditions per place. [2024-01-27 14:52:57,388 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 70 selfloop transitions, 48 changer transitions 33/159 dead transitions. [2024-01-27 14:52:57,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 159 transitions, 2229 flow [2024-01-27 14:52:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 14:52:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 14:52:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-01-27 14:52:57,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-01-27 14:52:57,389 INFO L175 Difference]: Start difference. First operand has 110 places, 119 transitions, 1523 flow. Second operand 8 states and 231 transitions. [2024-01-27 14:52:57,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 159 transitions, 2229 flow [2024-01-27 14:52:57,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 2187 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-01-27 14:52:57,415 INFO L231 Difference]: Finished difference. Result has 116 places, 105 transitions, 1370 flow [2024-01-27 14:52:57,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1370, PETRI_PLACES=116, PETRI_TRANSITIONS=105} [2024-01-27 14:52:57,416 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 65 predicate places. [2024-01-27 14:52:57,416 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 105 transitions, 1370 flow [2024-01-27 14:52:57,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:57,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:57,417 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] [2024-01-27 14:52:57,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 14:52:57,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:52:57,628 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:57,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:57,629 INFO L85 PathProgramCache]: Analyzing trace with hash 719708394, now seen corresponding path program 4 times [2024-01-27 14:52:57,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:57,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605855368] [2024-01-27 14:52:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:57,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:57,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605855368] [2024-01-27 14:52:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605855368] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:52:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643252751] [2024-01-27 14:52:57,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 14:52:57,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:52:57,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:52:57,716 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) [2024-01-27 14:52:57,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 14:52:57,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 14:52:57,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:52:57,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 14:52:57,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:52:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:57,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:52:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 14:52:57,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643252751] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:52:57,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:52:57,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 10 [2024-01-27 14:52:57,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877097360] [2024-01-27 14:52:57,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:52:57,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 14:52:57,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:57,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 14:52:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-27 14:52:57,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-01-27 14:52:57,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 105 transitions, 1370 flow. Second operand has 10 states, 10 states have (on average 22.6) internal successors, (226), 10 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:57,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:57,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-01-27 14:52:57,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:58,245 INFO L124 PetriNetUnfolderBase]: 460/937 cut-off events. [2024-01-27 14:52:58,246 INFO L125 PetriNetUnfolderBase]: For 13046/13046 co-relation queries the response was YES. [2024-01-27 14:52:58,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5518 conditions, 937 events. 460/937 cut-off events. For 13046/13046 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4871 event pairs, 40 based on Foata normal form. 24/958 useless extension candidates. Maximal degree in co-relation 5449. Up to 354 conditions per place. [2024-01-27 14:52:58,255 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 130 selfloop transitions, 70 changer transitions 12/220 dead transitions. [2024-01-27 14:52:58,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 220 transitions, 3114 flow [2024-01-27 14:52:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 14:52:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 14:52:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 324 transitions. [2024-01-27 14:52:58,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-01-27 14:52:58,257 INFO L175 Difference]: Start difference. First operand has 116 places, 105 transitions, 1370 flow. Second operand 12 states and 324 transitions. [2024-01-27 14:52:58,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 220 transitions, 3114 flow [2024-01-27 14:52:58,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 220 transitions, 2836 flow, removed 59 selfloop flow, removed 12 redundant places. [2024-01-27 14:52:58,285 INFO L231 Difference]: Finished difference. Result has 118 places, 150 transitions, 2129 flow [2024-01-27 14:52:58,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2129, PETRI_PLACES=118, PETRI_TRANSITIONS=150} [2024-01-27 14:52:58,287 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 67 predicate places. [2024-01-27 14:52:58,287 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 150 transitions, 2129 flow [2024-01-27 14:52:58,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.6) internal successors, (226), 10 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:58,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:58,288 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] [2024-01-27 14:52:58,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 14:52:58,498 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,SelfDestructingSolverStorable14 [2024-01-27 14:52:58,499 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:58,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:58,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1881183214, now seen corresponding path program 5 times [2024-01-27 14:52:58,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:58,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386819249] [2024-01-27 14:52:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:58,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:58,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:58,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386819249] [2024-01-27 14:52:58,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386819249] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:52:58,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6881887] [2024-01-27 14:52:58,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 14:52:58,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:52:58,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:52:58,541 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) [2024-01-27 14:52:58,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 14:52:58,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 14:52:58,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:52:58,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 14:52:58,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:52:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:58,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:52:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:58,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6881887] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:52:58,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:52:58,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-01-27 14:52:58,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457819223] [2024-01-27 14:52:58,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:52:58,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 14:52:58,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 14:52:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-01-27 14:52:58,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-01-27 14:52:58,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 150 transitions, 2129 flow. Second operand has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:58,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:58,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-01-27 14:52:58,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:59,028 INFO L124 PetriNetUnfolderBase]: 652/1335 cut-off events. [2024-01-27 14:52:59,029 INFO L125 PetriNetUnfolderBase]: For 17134/17134 co-relation queries the response was YES. [2024-01-27 14:52:59,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7624 conditions, 1335 events. 652/1335 cut-off events. For 17134/17134 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7574 event pairs, 54 based on Foata normal form. 8/1340 useless extension candidates. Maximal degree in co-relation 7536. Up to 352 conditions per place. [2024-01-27 14:52:59,042 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 157 selfloop transitions, 107 changer transitions 1/272 dead transitions. [2024-01-27 14:52:59,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 272 transitions, 3953 flow [2024-01-27 14:52:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 14:52:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 14:52:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 309 transitions. [2024-01-27 14:52:59,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-01-27 14:52:59,043 INFO L175 Difference]: Start difference. First operand has 118 places, 150 transitions, 2129 flow. Second operand 12 states and 309 transitions. [2024-01-27 14:52:59,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 272 transitions, 3953 flow [2024-01-27 14:52:59,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 272 transitions, 3877 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-01-27 14:52:59,085 INFO L231 Difference]: Finished difference. Result has 129 places, 197 transitions, 3260 flow [2024-01-27 14:52:59,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3260, PETRI_PLACES=129, PETRI_TRANSITIONS=197} [2024-01-27 14:52:59,085 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 78 predicate places. [2024-01-27 14:52:59,085 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 197 transitions, 3260 flow [2024-01-27 14:52:59,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:59,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:59,086 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] [2024-01-27 14:52:59,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 14:52:59,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 14:52:59,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:52:59,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:52:59,300 INFO L85 PathProgramCache]: Analyzing trace with hash -862643312, now seen corresponding path program 6 times [2024-01-27 14:52:59,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:52:59,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482142627] [2024-01-27 14:52:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:52:59,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:52:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:52:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 14:52:59,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:52:59,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482142627] [2024-01-27 14:52:59,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482142627] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:52:59,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466609686] [2024-01-27 14:52:59,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 14:52:59,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:52:59,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:52:59,343 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) [2024-01-27 14:52:59,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 14:52:59,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 14:52:59,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:52:59,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 14:52:59,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:52:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:59,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:52:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:52:59,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466609686] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:52:59,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:52:59,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-01-27 14:52:59,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120920881] [2024-01-27 14:52:59,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:52:59,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 14:52:59,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:52:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 14:52:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-01-27 14:52:59,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-01-27 14:52:59,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 197 transitions, 3260 flow. Second operand has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:59,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:52:59,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-01-27 14:52:59,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:52:59,830 INFO L124 PetriNetUnfolderBase]: 648/1364 cut-off events. [2024-01-27 14:52:59,831 INFO L125 PetriNetUnfolderBase]: For 20695/20713 co-relation queries the response was YES. [2024-01-27 14:52:59,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8382 conditions, 1364 events. 648/1364 cut-off events. For 20695/20713 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7683 event pairs, 54 based on Foata normal form. 16/1375 useless extension candidates. Maximal degree in co-relation 8288. Up to 286 conditions per place. [2024-01-27 14:52:59,845 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 157 selfloop transitions, 100 changer transitions 0/264 dead transitions. [2024-01-27 14:52:59,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 264 transitions, 4397 flow [2024-01-27 14:52:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 14:52:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 14:52:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 282 transitions. [2024-01-27 14:52:59,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231910946196661 [2024-01-27 14:52:59,846 INFO L175 Difference]: Start difference. First operand has 129 places, 197 transitions, 3260 flow. Second operand 11 states and 282 transitions. [2024-01-27 14:52:59,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 264 transitions, 4397 flow [2024-01-27 14:52:59,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 264 transitions, 4260 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-01-27 14:52:59,908 INFO L231 Difference]: Finished difference. Result has 139 places, 200 transitions, 3526 flow [2024-01-27 14:52:59,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3526, PETRI_PLACES=139, PETRI_TRANSITIONS=200} [2024-01-27 14:52:59,908 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 88 predicate places. [2024-01-27 14:52:59,909 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 200 transitions, 3526 flow [2024-01-27 14:52:59,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:52:59,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:52:59,909 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] [2024-01-27 14:52:59,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 14:53:00,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:00,120 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:00,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1818027364, now seen corresponding path program 7 times [2024-01-27 14:53:00,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:00,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898561282] [2024-01-27 14:53:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:00,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 14:53:00,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:00,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898561282] [2024-01-27 14:53:00,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898561282] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:00,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803459270] [2024-01-27 14:53:00,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 14:53:00,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:00,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:00,282 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) [2024-01-27 14:53:00,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 14:53:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:00,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 14:53:00,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:00,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:53:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:00,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803459270] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:53:00,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:53:00,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-01-27 14:53:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781380787] [2024-01-27 14:53:00,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:53:00,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 14:53:00,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 14:53:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-01-27 14:53:00,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-01-27 14:53:00,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 200 transitions, 3526 flow. Second operand has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:00,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:00,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-01-27 14:53:00,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:00,773 INFO L124 PetriNetUnfolderBase]: 582/1219 cut-off events. [2024-01-27 14:53:00,774 INFO L125 PetriNetUnfolderBase]: For 17820/17838 co-relation queries the response was YES. [2024-01-27 14:53:00,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7775 conditions, 1219 events. 582/1219 cut-off events. For 17820/17838 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6582 event pairs, 64 based on Foata normal form. 16/1230 useless extension candidates. Maximal degree in co-relation 7677. Up to 355 conditions per place. [2024-01-27 14:53:00,785 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 130 selfloop transitions, 85 changer transitions 15/237 dead transitions. [2024-01-27 14:53:00,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 4336 flow [2024-01-27 14:53:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 14:53:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 14:53:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-01-27 14:53:00,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48237476808905383 [2024-01-27 14:53:00,786 INFO L175 Difference]: Start difference. First operand has 139 places, 200 transitions, 3526 flow. Second operand 11 states and 260 transitions. [2024-01-27 14:53:00,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 4336 flow [2024-01-27 14:53:00,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 237 transitions, 4174 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-01-27 14:53:00,835 INFO L231 Difference]: Finished difference. Result has 144 places, 198 transitions, 3600 flow [2024-01-27 14:53:00,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3600, PETRI_PLACES=144, PETRI_TRANSITIONS=198} [2024-01-27 14:53:00,835 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2024-01-27 14:53:00,835 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 198 transitions, 3600 flow [2024-01-27 14:53:00,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:00,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:53:00,836 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] [2024-01-27 14:53:00,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 14:53:01,049 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,SelfDestructingSolverStorable17 [2024-01-27 14:53:01,050 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:01,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:01,051 INFO L85 PathProgramCache]: Analyzing trace with hash 679724769, now seen corresponding path program 8 times [2024-01-27 14:53:01,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:01,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853480788] [2024-01-27 14:53:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:01,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:01,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:01,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853480788] [2024-01-27 14:53:01,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853480788] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:01,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343266435] [2024-01-27 14:53:01,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 14:53:01,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:01,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:01,179 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) [2024-01-27 14:53:01,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 14:53:01,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 14:53:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:53:01,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 14:53:01,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:01,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:53:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 14:53:01,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343266435] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:53:01,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:53:01,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 16 [2024-01-27 14:53:01,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501229507] [2024-01-27 14:53:01,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:53:01,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 14:53:01,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:01,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 14:53:01,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-01-27 14:53:01,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-01-27 14:53:01,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 198 transitions, 3600 flow. Second operand has 16 states, 16 states have (on average 22.1875) internal successors, (355), 16 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:01,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:01,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-01-27 14:53:01,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:01,995 INFO L124 PetriNetUnfolderBase]: 1099/2209 cut-off events. [2024-01-27 14:53:01,995 INFO L125 PetriNetUnfolderBase]: For 36572/36590 co-relation queries the response was YES. [2024-01-27 14:53:02,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14362 conditions, 2209 events. 1099/2209 cut-off events. For 36572/36590 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 13239 event pairs, 190 based on Foata normal form. 58/2262 useless extension candidates. Maximal degree in co-relation 14263. Up to 807 conditions per place. [2024-01-27 14:53:02,016 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 290 selfloop transitions, 151 changer transitions 4/452 dead transitions. [2024-01-27 14:53:02,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 452 transitions, 8007 flow [2024-01-27 14:53:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 14:53:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 14:53:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 510 transitions. [2024-01-27 14:53:02,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547798066595059 [2024-01-27 14:53:02,018 INFO L175 Difference]: Start difference. First operand has 144 places, 198 transitions, 3600 flow. Second operand 19 states and 510 transitions. [2024-01-27 14:53:02,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 452 transitions, 8007 flow [2024-01-27 14:53:02,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 452 transitions, 7915 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-01-27 14:53:02,121 INFO L231 Difference]: Finished difference. Result has 171 places, 314 transitions, 6185 flow [2024-01-27 14:53:02,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6185, PETRI_PLACES=171, PETRI_TRANSITIONS=314} [2024-01-27 14:53:02,121 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-01-27 14:53:02,121 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 314 transitions, 6185 flow [2024-01-27 14:53:02,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.1875) internal successors, (355), 16 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:02,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:53:02,122 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] [2024-01-27 14:53:02,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 14:53:02,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:02,332 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:02,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash -277470157, now seen corresponding path program 9 times [2024-01-27 14:53:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:02,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511141900] [2024-01-27 14:53:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:02,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:02,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511141900] [2024-01-27 14:53:02,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511141900] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:02,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058757281] [2024-01-27 14:53:02,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 14:53:02,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:02,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:02,436 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) [2024-01-27 14:53:02,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 14:53:02,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 14:53:02,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:53:02,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 14:53:02,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 14:53:02,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:53:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 14:53:02,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058757281] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:53:02,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:53:02,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 14:53:02,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582958080] [2024-01-27 14:53:02,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:53:02,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 14:53:02,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:02,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 14:53:02,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2024-01-27 14:53:02,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-01-27 14:53:02,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 314 transitions, 6185 flow. Second operand has 18 states, 18 states have (on average 25.0) internal successors, (450), 18 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:02,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:02,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-01-27 14:53:02,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:03,710 INFO L124 PetriNetUnfolderBase]: 1632/3352 cut-off events. [2024-01-27 14:53:03,711 INFO L125 PetriNetUnfolderBase]: For 62494/62494 co-relation queries the response was YES. [2024-01-27 14:53:03,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23192 conditions, 3352 events. 1632/3352 cut-off events. For 62494/62494 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 22714 event pairs, 132 based on Foata normal form. 32/3381 useless extension candidates. Maximal degree in co-relation 23081. Up to 691 conditions per place. [2024-01-27 14:53:03,750 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 128 selfloop transitions, 396 changer transitions 35/567 dead transitions. [2024-01-27 14:53:03,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 567 transitions, 11013 flow [2024-01-27 14:53:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 14:53:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 14:53:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 846 transitions. [2024-01-27 14:53:03,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755102040816327 [2024-01-27 14:53:03,752 INFO L175 Difference]: Start difference. First operand has 171 places, 314 transitions, 6185 flow. Second operand 30 states and 846 transitions. [2024-01-27 14:53:03,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 567 transitions, 11013 flow [2024-01-27 14:53:03,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 567 transitions, 10552 flow, removed 123 selfloop flow, removed 3 redundant places. [2024-01-27 14:53:03,938 INFO L231 Difference]: Finished difference. Result has 206 places, 460 transitions, 9803 flow [2024-01-27 14:53:03,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5774, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9803, PETRI_PLACES=206, PETRI_TRANSITIONS=460} [2024-01-27 14:53:03,939 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 155 predicate places. [2024-01-27 14:53:03,939 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 460 transitions, 9803 flow [2024-01-27 14:53:03,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.0) internal successors, (450), 18 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:03,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:53:03,940 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] [2024-01-27 14:53:03,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 14:53:04,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:04,148 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:04,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:04,148 INFO L85 PathProgramCache]: Analyzing trace with hash 120174693, now seen corresponding path program 10 times [2024-01-27 14:53:04,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:04,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408477360] [2024-01-27 14:53:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:04,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 14:53:04,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:04,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408477360] [2024-01-27 14:53:04,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408477360] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:04,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059368204] [2024-01-27 14:53:04,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 14:53:04,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:04,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:04,265 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) [2024-01-27 14:53:04,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 14:53:04,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 14:53:04,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:53:04,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 14:53:04,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:04,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:53:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 14:53:04,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059368204] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:53:04,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:53:04,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 13 [2024-01-27 14:53:04,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850811168] [2024-01-27 14:53:04,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:53:04,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 14:53:04,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:04,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 14:53:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-01-27 14:53:04,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-01-27 14:53:04,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 460 transitions, 9803 flow. Second operand has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:04,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:04,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-01-27 14:53:04,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:05,727 INFO L124 PetriNetUnfolderBase]: 2258/4499 cut-off events. [2024-01-27 14:53:05,727 INFO L125 PetriNetUnfolderBase]: For 104399/104399 co-relation queries the response was YES. [2024-01-27 14:53:05,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34782 conditions, 4499 events. 2258/4499 cut-off events. For 104399/104399 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 32002 event pairs, 342 based on Foata normal form. 66/4562 useless extension candidates. Maximal degree in co-relation 34661. Up to 2109 conditions per place. [2024-01-27 14:53:05,779 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 461 selfloop transitions, 322 changer transitions 18/808 dead transitions. [2024-01-27 14:53:05,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 808 transitions, 18187 flow [2024-01-27 14:53:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 14:53:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 14:53:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 503 transitions. [2024-01-27 14:53:05,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513265306122449 [2024-01-27 14:53:05,783 INFO L175 Difference]: Start difference. First operand has 206 places, 460 transitions, 9803 flow. Second operand 20 states and 503 transitions. [2024-01-27 14:53:05,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 808 transitions, 18187 flow [2024-01-27 14:53:06,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 808 transitions, 16983 flow, removed 523 selfloop flow, removed 11 redundant places. [2024-01-27 14:53:06,229 INFO L231 Difference]: Finished difference. Result has 223 places, 656 transitions, 14616 flow [2024-01-27 14:53:06,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=9201, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14616, PETRI_PLACES=223, PETRI_TRANSITIONS=656} [2024-01-27 14:53:06,230 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 172 predicate places. [2024-01-27 14:53:06,230 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 656 transitions, 14616 flow [2024-01-27 14:53:06,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.307692307692307) internal successors, (277), 13 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:06,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:53:06,231 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] [2024-01-27 14:53:06,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-27 14:53:06,442 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,SelfDestructingSolverStorable20 [2024-01-27 14:53:06,442 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:06,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash 643954009, now seen corresponding path program 11 times [2024-01-27 14:53:06,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:06,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291127440] [2024-01-27 14:53:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:06,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:06,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:06,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291127440] [2024-01-27 14:53:06,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291127440] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:06,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734619073] [2024-01-27 14:53:06,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 14:53:06,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:06,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:06,581 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) [2024-01-27 14:53:06,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 14:53:06,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 14:53:06,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:53:06,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 14:53:06,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 14:53:06,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 14:53:06,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734619073] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:53:06,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 14:53:06,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-01-27 14:53:06,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919797662] [2024-01-27 14:53:06,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:53:06,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 14:53:06,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:06,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 14:53:06,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2024-01-27 14:53:06,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-01-27 14:53:06,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 656 transitions, 14616 flow. Second operand has 8 states, 8 states have (on average 25.375) internal successors, (203), 8 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:06,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:06,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-01-27 14:53:06,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:08,299 INFO L124 PetriNetUnfolderBase]: 2895/5845 cut-off events. [2024-01-27 14:53:08,299 INFO L125 PetriNetUnfolderBase]: For 156741/156761 co-relation queries the response was YES. [2024-01-27 14:53:08,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46728 conditions, 5845 events. 2895/5845 cut-off events. For 156741/156761 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 44204 event pairs, 176 based on Foata normal form. 18/5858 useless extension candidates. Maximal degree in co-relation 46597. Up to 1118 conditions per place. [2024-01-27 14:53:08,374 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 76 selfloop transitions, 718 changer transitions 82/884 dead transitions. [2024-01-27 14:53:08,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 884 transitions, 21202 flow [2024-01-27 14:53:08,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 14:53:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 14:53:08,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 315 transitions. [2024-01-27 14:53:08,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-01-27 14:53:08,376 INFO L175 Difference]: Start difference. First operand has 223 places, 656 transitions, 14616 flow. Second operand 11 states and 315 transitions. [2024-01-27 14:53:08,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 884 transitions, 21202 flow [2024-01-27 14:53:09,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 884 transitions, 20880 flow, removed 127 selfloop flow, removed 4 redundant places. [2024-01-27 14:53:09,101 INFO L231 Difference]: Finished difference. Result has 235 places, 784 transitions, 20161 flow [2024-01-27 14:53:09,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=14322, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20161, PETRI_PLACES=235, PETRI_TRANSITIONS=784} [2024-01-27 14:53:09,101 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 184 predicate places. [2024-01-27 14:53:09,102 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 784 transitions, 20161 flow [2024-01-27 14:53:09,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.375) internal successors, (203), 8 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:09,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:53:09,102 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:53:09,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-27 14:53:09,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-01-27 14:53:09,302 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:09,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1521299828, now seen corresponding path program 12 times [2024-01-27 14:53:09,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:09,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74707524] [2024-01-27 14:53:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:09,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:09,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:09,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74707524] [2024-01-27 14:53:09,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74707524] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:09,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121937106] [2024-01-27 14:53:09,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 14:53:09,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:09,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:09,381 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) [2024-01-27 14:53:09,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 14:53:09,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 14:53:09,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:53:09,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 14:53:09,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:09,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:53:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:09,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121937106] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:53:09,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:53:09,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-01-27 14:53:09,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941037534] [2024-01-27 14:53:09,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:53:09,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 14:53:09,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:09,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 14:53:09,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2024-01-27 14:53:09,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-01-27 14:53:09,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 784 transitions, 20161 flow. Second operand has 15 states, 15 states have (on average 25.4) internal successors, (381), 15 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:09,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:09,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-01-27 14:53:09,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:11,396 INFO L124 PetriNetUnfolderBase]: 2142/4563 cut-off events. [2024-01-27 14:53:11,397 INFO L125 PetriNetUnfolderBase]: For 136499/136499 co-relation queries the response was YES. [2024-01-27 14:53:11,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41477 conditions, 4563 events. 2142/4563 cut-off events. For 136499/136499 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 34093 event pairs, 94 based on Foata normal form. 28/4588 useless extension candidates. Maximal degree in co-relation 41339. Up to 800 conditions per place. [2024-01-27 14:53:11,445 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 454 selfloop transitions, 561 changer transitions 16/1039 dead transitions. [2024-01-27 14:53:11,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1039 transitions, 27758 flow [2024-01-27 14:53:11,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 14:53:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 14:53:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 684 transitions. [2024-01-27 14:53:11,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-01-27 14:53:11,447 INFO L175 Difference]: Start difference. First operand has 235 places, 784 transitions, 20161 flow. Second operand 24 states and 684 transitions. [2024-01-27 14:53:11,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1039 transitions, 27758 flow [2024-01-27 14:53:12,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1039 transitions, 26621 flow, removed 169 selfloop flow, removed 6 redundant places. [2024-01-27 14:53:12,097 INFO L231 Difference]: Finished difference. Result has 261 places, 900 transitions, 24379 flow [2024-01-27 14:53:12,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=19263, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=24379, PETRI_PLACES=261, PETRI_TRANSITIONS=900} [2024-01-27 14:53:12,098 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-01-27 14:53:12,098 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 900 transitions, 24379 flow [2024-01-27 14:53:12,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.4) internal successors, (381), 15 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:12,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:53:12,098 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:53:12,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 14:53:12,299 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,SelfDestructingSolverStorable22 [2024-01-27 14:53:12,299 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:12,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:12,299 INFO L85 PathProgramCache]: Analyzing trace with hash -634467591, now seen corresponding path program 13 times [2024-01-27 14:53:12,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:12,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615869357] [2024-01-27 14:53:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:12,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 14:53:12,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:12,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615869357] [2024-01-27 14:53:12,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615869357] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:12,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133142744] [2024-01-27 14:53:12,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 14:53:12,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:12,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:12,360 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) [2024-01-27 14:53:12,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 14:53:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:12,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 14:53:12,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:12,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:53:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:12,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133142744] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:53:12,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:53:12,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-01-27 14:53:12,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713427387] [2024-01-27 14:53:12,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:53:12,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 14:53:12,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:12,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 14:53:12,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2024-01-27 14:53:12,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-01-27 14:53:12,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 900 transitions, 24379 flow. Second operand has 16 states, 16 states have (on average 20.625) internal successors, (330), 16 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:12,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:12,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-01-27 14:53:12,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:14,682 INFO L124 PetriNetUnfolderBase]: 2476/5271 cut-off events. [2024-01-27 14:53:14,683 INFO L125 PetriNetUnfolderBase]: For 170464/170484 co-relation queries the response was YES. [2024-01-27 14:53:14,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48611 conditions, 5271 events. 2476/5271 cut-off events. For 170464/170484 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 40052 event pairs, 206 based on Foata normal form. 34/5300 useless extension candidates. Maximal degree in co-relation 48465. Up to 1047 conditions per place. [2024-01-27 14:53:14,739 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 491 selfloop transitions, 639 changer transitions 16/1153 dead transitions. [2024-01-27 14:53:14,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1153 transitions, 32332 flow [2024-01-27 14:53:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 14:53:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 14:53:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 443 transitions. [2024-01-27 14:53:14,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022675736961452 [2024-01-27 14:53:14,740 INFO L175 Difference]: Start difference. First operand has 261 places, 900 transitions, 24379 flow. Second operand 18 states and 443 transitions. [2024-01-27 14:53:14,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1153 transitions, 32332 flow [2024-01-27 14:53:15,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1153 transitions, 31777 flow, removed 270 selfloop flow, removed 4 redundant places. [2024-01-27 14:53:15,660 INFO L231 Difference]: Finished difference. Result has 283 places, 996 transitions, 29346 flow [2024-01-27 14:53:15,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=24030, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=29346, PETRI_PLACES=283, PETRI_TRANSITIONS=996} [2024-01-27 14:53:15,661 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 232 predicate places. [2024-01-27 14:53:15,661 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 996 transitions, 29346 flow [2024-01-27 14:53:15,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.625) internal successors, (330), 16 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:15,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:53:15,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:53:15,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 14:53:15,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:15,863 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:15,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash -846557509, now seen corresponding path program 14 times [2024-01-27 14:53:15,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:15,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254269591] [2024-01-27 14:53:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:15,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:15,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:15,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254269591] [2024-01-27 14:53:15,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254269591] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:15,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522160900] [2024-01-27 14:53:15,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 14:53:15,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:15,912 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) [2024-01-27 14:53:15,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 14:53:15,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 14:53:15,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:53:15,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 14:53:15,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:16,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:53:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:16,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522160900] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:53:16,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:53:16,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-01-27 14:53:16,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616589385] [2024-01-27 14:53:16,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:53:16,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 14:53:16,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:16,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 14:53:16,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-01-27 14:53:16,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-01-27 14:53:16,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 996 transitions, 29346 flow. Second operand has 16 states, 16 states have (on average 20.625) internal successors, (330), 16 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:16,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:16,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-01-27 14:53:16,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:18,087 INFO L124 PetriNetUnfolderBase]: 2341/4905 cut-off events. [2024-01-27 14:53:18,087 INFO L125 PetriNetUnfolderBase]: For 164799/164799 co-relation queries the response was YES. [2024-01-27 14:53:18,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47902 conditions, 4905 events. 2341/4905 cut-off events. For 164799/164799 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 36064 event pairs, 130 based on Foata normal form. 14/4916 useless extension candidates. Maximal degree in co-relation 47745. Up to 1047 conditions per place. [2024-01-27 14:53:18,158 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 461 selfloop transitions, 672 changer transitions 2/1142 dead transitions. [2024-01-27 14:53:18,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 1142 transitions, 33705 flow [2024-01-27 14:53:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 14:53:18,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 14:53:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 466 transitions. [2024-01-27 14:53:18,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005370569280344 [2024-01-27 14:53:18,165 INFO L175 Difference]: Start difference. First operand has 283 places, 996 transitions, 29346 flow. Second operand 19 states and 466 transitions. [2024-01-27 14:53:18,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 1142 transitions, 33705 flow [2024-01-27 14:53:19,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1142 transitions, 33326 flow, removed 185 selfloop flow, removed 1 redundant places. [2024-01-27 14:53:19,288 INFO L231 Difference]: Finished difference. Result has 301 places, 1006 transitions, 30802 flow [2024-01-27 14:53:19,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=28839, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=657, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=30802, PETRI_PLACES=301, PETRI_TRANSITIONS=1006} [2024-01-27 14:53:19,289 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 250 predicate places. [2024-01-27 14:53:19,289 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 1006 transitions, 30802 flow [2024-01-27 14:53:19,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.625) internal successors, (330), 16 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:19,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:53:19,290 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:53:19,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 14:53:19,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:19,491 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:19,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2104210099, now seen corresponding path program 15 times [2024-01-27 14:53:19,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:19,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557501931] [2024-01-27 14:53:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:19,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 14:53:19,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:19,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557501931] [2024-01-27 14:53:19,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557501931] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:19,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499522206] [2024-01-27 14:53:19,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 14:53:19,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:19,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:19,559 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) [2024-01-27 14:53:19,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 14:53:19,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-01-27 14:53:19,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:53:19,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 14:53:19,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 14:53:19,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 14:53:19,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499522206] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 14:53:19,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 14:53:19,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 11 [2024-01-27 14:53:19,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411565816] [2024-01-27 14:53:19,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 14:53:19,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 14:53:19,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:19,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 14:53:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-01-27 14:53:19,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-01-27 14:53:19,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1006 transitions, 30802 flow. Second operand has 8 states, 8 states have (on average 25.5) internal successors, (204), 8 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:19,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:19,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-01-27 14:53:19,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:21,732 INFO L124 PetriNetUnfolderBase]: 2637/5507 cut-off events. [2024-01-27 14:53:21,732 INFO L125 PetriNetUnfolderBase]: For 186305/186305 co-relation queries the response was YES. [2024-01-27 14:53:21,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55101 conditions, 5507 events. 2637/5507 cut-off events. For 186305/186305 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 41355 event pairs, 57 based on Foata normal form. 10/5514 useless extension candidates. Maximal degree in co-relation 54941. Up to 1048 conditions per place. [2024-01-27 14:53:21,795 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 69 selfloop transitions, 134 changer transitions 954/1165 dead transitions. [2024-01-27 14:53:21,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1165 transitions, 37323 flow [2024-01-27 14:53:21,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 14:53:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 14:53:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 318 transitions. [2024-01-27 14:53:21,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5899814471243042 [2024-01-27 14:53:21,797 INFO L175 Difference]: Start difference. First operand has 301 places, 1006 transitions, 30802 flow. Second operand 11 states and 318 transitions. [2024-01-27 14:53:21,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1165 transitions, 37323 flow [2024-01-27 14:53:22,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1165 transitions, 36288 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-01-27 14:53:22,962 INFO L231 Difference]: Finished difference. Result has 306 places, 188 transitions, 5028 flow [2024-01-27 14:53:22,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=29892, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=871, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5028, PETRI_PLACES=306, PETRI_TRANSITIONS=188} [2024-01-27 14:53:22,963 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 255 predicate places. [2024-01-27 14:53:22,964 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 188 transitions, 5028 flow [2024-01-27 14:53:22,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.5) internal successors, (204), 8 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:22,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:53:22,964 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:53:22,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 14:53:23,175 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,SelfDestructingSolverStorable25 [2024-01-27 14:53:23,175 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:23,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash 546142712, now seen corresponding path program 16 times [2024-01-27 14:53:23,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:23,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116323384] [2024-01-27 14:53:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:23,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:23,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:23,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116323384] [2024-01-27 14:53:23,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116323384] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:23,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325015931] [2024-01-27 14:53:23,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 14:53:23,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:23,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:23,296 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) [2024-01-27 14:53:23,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 14:53:23,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 14:53:23,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:53:23,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 14:53:23,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:23,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:53:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 14:53:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325015931] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:53:23,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:53:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 21 [2024-01-27 14:53:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856616569] [2024-01-27 14:53:23,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:53:23,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 14:53:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:23,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 14:53:23,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-01-27 14:53:23,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-01-27 14:53:23,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 188 transitions, 5028 flow. Second operand has 21 states, 21 states have (on average 21.761904761904763) internal successors, (457), 21 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:23,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:23,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-01-27 14:53:23,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:24,705 INFO L124 PetriNetUnfolderBase]: 1329/3018 cut-off events. [2024-01-27 14:53:24,706 INFO L125 PetriNetUnfolderBase]: For 108355/108367 co-relation queries the response was YES. [2024-01-27 14:53:24,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24966 conditions, 3018 events. 1329/3018 cut-off events. For 108355/108367 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 21629 event pairs, 271 based on Foata normal form. 8/3023 useless extension candidates. Maximal degree in co-relation 24858. Up to 970 conditions per place. [2024-01-27 14:53:24,737 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 279 selfloop transitions, 121 changer transitions 12/419 dead transitions. [2024-01-27 14:53:24,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 419 transitions, 10436 flow [2024-01-27 14:53:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 14:53:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 14:53:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 616 transitions. [2024-01-27 14:53:24,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-01-27 14:53:24,739 INFO L175 Difference]: Start difference. First operand has 306 places, 188 transitions, 5028 flow. Second operand 24 states and 616 transitions. [2024-01-27 14:53:24,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 419 transitions, 10436 flow [2024-01-27 14:53:25,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 419 transitions, 7804 flow, removed 435 selfloop flow, removed 78 redundant places. [2024-01-27 14:53:25,045 INFO L231 Difference]: Finished difference. Result has 231 places, 254 transitions, 5285 flow [2024-01-27 14:53:25,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5285, PETRI_PLACES=231, PETRI_TRANSITIONS=254} [2024-01-27 14:53:25,046 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 180 predicate places. [2024-01-27 14:53:25,046 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 254 transitions, 5285 flow [2024-01-27 14:53:25,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.761904761904763) internal successors, (457), 21 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:25,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 14:53:25,046 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:53:25,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 14:53:25,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 14:53:25,247 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-01-27 14:53:25,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 14:53:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1528129392, now seen corresponding path program 17 times [2024-01-27 14:53:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 14:53:25,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480643198] [2024-01-27 14:53:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 14:53:25,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 14:53:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 14:53:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 14:53:25,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 14:53:25,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480643198] [2024-01-27 14:53:25,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480643198] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 14:53:25,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163155953] [2024-01-27 14:53:25,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 14:53:25,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 14:53:25,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 14:53:25,369 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) [2024-01-27 14:53:25,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 14:53:25,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-27 14:53:25,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 14:53:25,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 14:53:25,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 14:53:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 14:53:25,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 14:53:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 14:53:25,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163155953] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 14:53:25,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 14:53:25,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-01-27 14:53:25,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659961457] [2024-01-27 14:53:25,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 14:53:25,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 14:53:25,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 14:53:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 14:53:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2024-01-27 14:53:25,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-01-27 14:53:25,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 254 transitions, 5285 flow. Second operand has 20 states, 20 states have (on average 24.85) internal successors, (497), 20 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:25,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 14:53:25,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-01-27 14:53:25,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 14:53:26,755 INFO L124 PetriNetUnfolderBase]: 1194/2691 cut-off events. [2024-01-27 14:53:26,756 INFO L125 PetriNetUnfolderBase]: For 47411/47411 co-relation queries the response was YES. [2024-01-27 14:53:26,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18591 conditions, 2691 events. 1194/2691 cut-off events. For 47411/47411 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18615 event pairs, 60 based on Foata normal form. 48/2736 useless extension candidates. Maximal degree in co-relation 18520. Up to 805 conditions per place. [2024-01-27 14:53:26,774 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 0 selfloop transitions, 0 changer transitions 297/297 dead transitions. [2024-01-27 14:53:26,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 297 transitions, 5970 flow [2024-01-27 14:53:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 14:53:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 14:53:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 697 transitions. [2024-01-27 14:53:26,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470957613814756 [2024-01-27 14:53:26,775 INFO L175 Difference]: Start difference. First operand has 231 places, 254 transitions, 5285 flow. Second operand 26 states and 697 transitions. [2024-01-27 14:53:26,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 297 transitions, 5970 flow [2024-01-27 14:53:26,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 297 transitions, 5598 flow, removed 79 selfloop flow, removed 20 redundant places. [2024-01-27 14:53:26,917 INFO L231 Difference]: Finished difference. Result has 230 places, 0 transitions, 0 flow [2024-01-27 14:53:26,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=0, PETRI_PLACES=230, PETRI_TRANSITIONS=0} [2024-01-27 14:53:26,917 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 179 predicate places. [2024-01-27 14:53:26,917 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 0 transitions, 0 flow [2024-01-27 14:53:26,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 24.85) internal successors, (497), 20 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 14:53:26,921 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 26 remaining) [2024-01-27 14:53:26,922 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION (10 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 26 remaining) [2024-01-27 14:53:26,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 26 remaining) [2024-01-27 14:53:26,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 14:53:27,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 14:53:27,124 INFO L445 BasicCegarLoop]: Path program histogram: [17, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 14:53:27,128 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-27 14:53:27,128 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-27 14:53:27,130 INFO L503 ceAbstractionStarter]: Automizer considered 15 witness invariants [2024-01-27 14:53:27,131 INFO L504 ceAbstractionStarter]: WitnessConsidered=15 [2024-01-27 14:53:27,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 02:53:27 BasicIcfg [2024-01-27 14:53:27,132 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-27 14:53:27,132 INFO L158 Benchmark]: Toolchain (without parser) took 35397.42ms. Allocated memory was 178.3MB in the beginning and 5.9GB in the end (delta: 5.7GB). Free memory was 145.2MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-01-27 14:53:27,132 INFO L158 Benchmark]: Witness Parser took 0.47ms. Allocated memory is still 178.3MB. Free memory was 142.4MB in the beginning and 142.4MB in the end (delta: 16.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 14:53:27,132 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 178.3MB. Free memory is still 150.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 14:53:27,133 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.36ms. Allocated memory is still 178.3MB. Free memory was 144.4MB in the beginning and 130.7MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-01-27 14:53:27,133 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.92ms. Allocated memory is still 178.3MB. Free memory was 130.7MB in the beginning and 129.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 14:53:27,133 INFO L158 Benchmark]: Boogie Preprocessor took 40.54ms. Allocated memory is still 178.3MB. Free memory was 129.3MB in the beginning and 127.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 14:53:27,133 INFO L158 Benchmark]: RCFGBuilder took 383.83ms. Allocated memory is still 178.3MB. Free memory was 127.2MB in the beginning and 103.4MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-01-27 14:53:27,133 INFO L158 Benchmark]: TraceAbstraction took 34690.28ms. Allocated memory was 178.3MB in the beginning and 5.9GB in the end (delta: 5.7GB). Free memory was 102.7MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-01-27 14:53:27,134 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.47ms. Allocated memory is still 178.3MB. Free memory was 142.4MB in the beginning and 142.4MB in the end (delta: 16.8kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 178.3MB. Free memory is still 150.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.36ms. Allocated memory is still 178.3MB. Free memory was 144.4MB in the beginning and 130.7MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.92ms. Allocated memory is still 178.3MB. Free memory was 130.7MB in the beginning and 129.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 40.54ms. Allocated memory is still 178.3MB. Free memory was 129.3MB in the beginning and 127.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 383.83ms. Allocated memory is still 178.3MB. Free memory was 127.2MB in the beginning and 103.4MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 34690.28ms. Allocated memory was 178.3MB in the beginning and 5.9GB in the end (delta: 5.7GB). Free memory was 102.7MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 42]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 45]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 41]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 49]: 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: 53]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 49]: 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: 59]: 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: 59]: 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: 59]: 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: 70]: 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, 72 locations, 26 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: 34.6s, OverallIterations: 28, TraceHistogramMax: 3, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 24.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3392 SdHoareTripleChecker+Valid, 4.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3087 mSDsluCounter, 94 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 591 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9681 IncrementalHoareTripleChecker+Invalid, 10272 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 591 mSolverCounterUnsat, 52 mSDtfsCounter, 9681 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1462 GetRequests, 1088 SyntacticMatches, 8 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30802occurred in iteration=25, InterpolantAutomatonStates: 331, 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, 0.5s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1444 NumberOfCodeBlocks, 1441 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 1893 ConstructedInterpolants, 0 QuantifiedInterpolants, 7217 SizeOfPredicates, 9 NumberOfNonLiveVariables, 2867 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 60 InterpolantComputations, 15 PerfectInterpolantSequences, 247/521 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 16 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-27 14:53:27,164 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