./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.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/chl-name-comparator-trans.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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/chl-name-comparator-trans.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-name-comparator-trans.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-?-80b1b13-m [2024-01-31 16:48:33,997 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:48:34,072 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:48:34,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:48:34,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:48:34,100 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:48:34,100 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:48:34,101 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:48:34,101 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:48:34,104 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:48:34,104 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:48:34,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:48:34,105 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:48:34,106 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:48:34,106 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:48:34,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:48:34,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:48:34,107 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:48:34,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:48:34,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:48:34,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:48:34,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:48:34,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:48:34,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:48:34,109 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:48:34,109 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:48:34,109 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:48:34,109 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:48:34,110 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:48:34,110 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:48:34,111 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:48:34,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:48:34,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:48:34,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:48:34,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:48:34,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:48:34,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:48:34,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:48:34,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:48:34,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:48:34,112 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:48:34,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:48:34,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:48:34,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:48:34,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:48:34,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:48:34,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:48:34,340 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:48:34,341 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:48:34,342 INFO L431 ainManager$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/chl-name-comparator-trans.wvr.yml/witness.yml [2024-01-31 16:48:34,523 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:48:34,524 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:48:34,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2024-01-31 16:48:35,582 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:48:35,771 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:48:35,772 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2024-01-31 16:48:35,781 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7ebdad2c/89a3248705c84aa98b4e5547a2a8cf22/FLAG34a74c602 [2024-01-31 16:48:35,795 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7ebdad2c/89a3248705c84aa98b4e5547a2a8cf22 [2024-01-31 16:48:35,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:48:35,797 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:48:35,799 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:48:35,799 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:48:35,803 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:48:35,803 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:48:34" (1/2) ... [2024-01-31 16:48:35,804 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6dea43 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:48:35, skipping insertion in model container [2024-01-31 16:48:35,804 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:48:34" (1/2) ... [2024-01-31 16:48:35,806 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ecf5b1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:48:35, skipping insertion in model container [2024-01-31 16:48:35,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:48:35" (2/2) ... [2024-01-31 16:48:35,806 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6dea43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:35, skipping insertion in model container [2024-01-31 16:48:35,806 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:48:35" (2/2) ... [2024-01-31 16:48:35,807 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:48:35,877 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 16:48:35,902 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:48:36,062 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/chl-name-comparator-trans.wvr.c[4827,4840] [2024-01-31 16:48:36,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:48:36,076 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:48:36,095 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/chl-name-comparator-trans.wvr.c[4827,4840] [2024-01-31 16:48:36,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:48:36,108 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:48:36,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36 WrapperNode [2024-01-31 16:48:36,109 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:48:36,110 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:48:36,110 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:48:36,110 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:48:36,114 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,162 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2024-01-31 16:48:36,163 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:48:36,165 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:48:36,165 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:48:36,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:48:36,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,186 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,211 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 2, 4, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-31 16:48:36,212 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,212 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,221 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,226 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,230 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,245 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:48:36,249 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:48:36,249 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:48:36,249 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:48:36,250 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (1/1) ... [2024-01-31 16:48:36,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:48:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:36,298 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) [2024-01-31 16:48:36,322 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 [2024-01-31 16:48:36,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:48:36,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:48:36,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 16:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:48:36,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:48:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 16:48:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:48:36,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:48:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:48:36,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:48:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 16:48:36,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 16:48:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:48:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:48:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:48:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:48:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 16:48:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 16:48:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:48:36,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:48:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:48:36,354 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:48:36,446 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:48:36,447 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:48:36,769 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:48:36,769 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:48:37,172 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:48:37,173 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 16:48:37,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:48:37 BoogieIcfgContainer [2024-01-31 16:48:37,175 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:48:37,177 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:48:37,177 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:48:37,179 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:48:37,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:48:34" (1/4) ... [2024-01-31 16:48:37,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c5436c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:48:37, skipping insertion in model container [2024-01-31 16:48:37,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:48:35" (2/4) ... [2024-01-31 16:48:37,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c5436c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:48:37, skipping insertion in model container [2024-01-31 16:48:37,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:48:36" (3/4) ... [2024-01-31 16:48:37,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c5436c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:48:37, skipping insertion in model container [2024-01-31 16:48:37,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:48:37" (4/4) ... [2024-01-31 16:48:37,183 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2024-01-31 16:48:37,197 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:48:37,197 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 16:48:37,198 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:48:37,256 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-31 16:48:37,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 38 transitions, 97 flow [2024-01-31 16:48:37,319 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2024-01-31 16:48:37,319 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:48:37,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 35 events. 7/35 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-01-31 16:48:37,323 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 38 transitions, 97 flow [2024-01-31 16:48:37,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 34 transitions, 86 flow [2024-01-31 16:48:37,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:48:37,344 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;@59ded42a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:48:37,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 16:48:37,358 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:48:37,359 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2024-01-31 16:48:37,359 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:48:37,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:37,360 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] [2024-01-31 16:48:37,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:48:37,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash 566723653, now seen corresponding path program 1 times [2024-01-31 16:48:37,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:37,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575843846] [2024-01-31 16:48:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:37,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:37,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575843846] [2024-01-31 16:48:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575843846] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:37,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:37,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:48:37,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645771189] [2024-01-31 16:48:37,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:37,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 16:48:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:37,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 16:48:37,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 16:48:37,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:48:37,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:37,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:37,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:48:37,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:37,753 INFO L124 PetriNetUnfolderBase]: 466/696 cut-off events. [2024-01-31 16:48:37,754 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-01-31 16:48:37,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 696 events. 466/696 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2428 event pairs, 333 based on Foata normal form. 132/675 useless extension candidates. Maximal degree in co-relation 1177. Up to 679 conditions per place. [2024-01-31 16:48:37,762 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 27 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2024-01-31 16:48:37,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 134 flow [2024-01-31 16:48:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 16:48:37,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 16:48:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 44 transitions. [2024-01-31 16:48:37,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-01-31 16:48:37,772 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 86 flow. Second operand 2 states and 44 transitions. [2024-01-31 16:48:37,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 134 flow [2024-01-31 16:48:37,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 122 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 16:48:37,778 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 68 flow [2024-01-31 16:48:37,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2024-01-31 16:48:37,782 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2024-01-31 16:48:37,782 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 68 flow [2024-01-31 16:48:37,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:37,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:37,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:37,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:48:37,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:48:37,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:37,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1846188191, now seen corresponding path program 1 times [2024-01-31 16:48:37,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:37,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654645063] [2024-01-31 16:48:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:37,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:37,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654645063] [2024-01-31 16:48:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654645063] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:37,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:37,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:48:38,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448399650] [2024-01-31 16:48:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:38,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:48:38,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:38,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:48:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:48:38,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:48:38,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:38,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:38,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:48:38,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:38,134 INFO L124 PetriNetUnfolderBase]: 466/697 cut-off events. [2024-01-31 16:48:38,135 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:48:38,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 697 events. 466/697 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2434 event pairs, 333 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 1397. Up to 679 conditions per place. [2024-01-31 16:48:38,138 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-01-31 16:48:38,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 126 flow [2024-01-31 16:48:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:48:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:48:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-01-31 16:48:38,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2024-01-31 16:48:38,143 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 68 flow. Second operand 3 states and 50 transitions. [2024-01-31 16:48:38,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 126 flow [2024-01-31 16:48:38,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:48:38,149 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 80 flow [2024-01-31 16:48:38,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-01-31 16:48:38,151 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2024-01-31 16:48:38,151 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 80 flow [2024-01-31 16:48:38,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:38,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:38,152 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] [2024-01-31 16:48:38,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:48:38,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:48:38,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:38,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1978685021, now seen corresponding path program 1 times [2024-01-31 16:48:38,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:38,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077907471] [2024-01-31 16:48:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:38,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:38,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:38,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077907471] [2024-01-31 16:48:38,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077907471] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:38,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153663947] [2024-01-31 16:48:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:38,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:38,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:38,270 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) [2024-01-31 16:48:38,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:48:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:38,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:48:38,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:38,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:38,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153663947] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:38,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:38,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-31 16:48:38,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712291375] [2024-01-31 16:48:38,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:38,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:48:38,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:48:38,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:48:38,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:48:38,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:38,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:38,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:48:38,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:38,609 INFO L124 PetriNetUnfolderBase]: 466/699 cut-off events. [2024-01-31 16:48:38,609 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:48:38,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 699 events. 466/699 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2418 event pairs, 333 based on Foata normal form. 0/546 useless extension candidates. Maximal degree in co-relation 1408. Up to 679 conditions per place. [2024-01-31 16:48:38,612 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 26 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2024-01-31 16:48:38,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 148 flow [2024-01-31 16:48:38,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:48:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:48:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-01-31 16:48:38,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526315789473684 [2024-01-31 16:48:38,613 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 80 flow. Second operand 5 states and 67 transitions. [2024-01-31 16:48:38,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 148 flow [2024-01-31 16:48:38,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 144 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:48:38,615 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 102 flow [2024-01-31 16:48:38,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-01-31 16:48:38,615 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2024-01-31 16:48:38,616 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 102 flow [2024-01-31 16:48:38,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:38,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:38,616 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1] [2024-01-31 16:48:38,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 16:48:38,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:38,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:48:38,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:38,828 INFO L85 PathProgramCache]: Analyzing trace with hash 271554205, now seen corresponding path program 2 times [2024-01-31 16:48:38,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:38,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319570946] [2024-01-31 16:48:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:38,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:39,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:39,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319570946] [2024-01-31 16:48:39,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319570946] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:39,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:39,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:48:39,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841578953] [2024-01-31 16:48:39,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:39,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:48:39,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:48:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:48:39,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:48:39,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:39,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:39,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:48:39,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:39,317 INFO L124 PetriNetUnfolderBase]: 832/1271 cut-off events. [2024-01-31 16:48:39,317 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-31 16:48:39,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 1271 events. 832/1271 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5423 event pairs, 333 based on Foata normal form. 1/1010 useless extension candidates. Maximal degree in co-relation 2535. Up to 682 conditions per place. [2024-01-31 16:48:39,321 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 42 selfloop transitions, 2 changer transitions 20/68 dead transitions. [2024-01-31 16:48:39,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 305 flow [2024-01-31 16:48:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:48:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:48:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-01-31 16:48:39,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2024-01-31 16:48:39,324 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 102 flow. Second operand 4 states and 90 transitions. [2024-01-31 16:48:39,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 305 flow [2024-01-31 16:48:39,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 295 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-01-31 16:48:39,326 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 106 flow [2024-01-31 16:48:39,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-01-31 16:48:39,328 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2024-01-31 16:48:39,328 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 106 flow [2024-01-31 16:48:39,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:39,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:39,328 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:39,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:48:39,329 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:48:39,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:39,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1285882536, now seen corresponding path program 1 times [2024-01-31 16:48:39,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:39,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135324129] [2024-01-31 16:48:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 16:48:39,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:39,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135324129] [2024-01-31 16:48:39,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135324129] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:39,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:39,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:48:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506023962] [2024-01-31 16:48:39,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:39,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:48:39,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:48:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:48:39,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:48:39,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:39,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:39,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:48:39,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:39,777 INFO L124 PetriNetUnfolderBase]: 1150/1753 cut-off events. [2024-01-31 16:48:39,778 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-01-31 16:48:39,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3844 conditions, 1753 events. 1150/1753 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8268 event pairs, 493 based on Foata normal form. 1/1489 useless extension candidates. Maximal degree in co-relation 3834. Up to 962 conditions per place. [2024-01-31 16:48:39,783 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 44 selfloop transitions, 2 changer transitions 19/69 dead transitions. [2024-01-31 16:48:39,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 69 transitions, 330 flow [2024-01-31 16:48:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:48:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:48:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-01-31 16:48:39,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2024-01-31 16:48:39,785 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 106 flow. Second operand 4 states and 88 transitions. [2024-01-31 16:48:39,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 69 transitions, 330 flow [2024-01-31 16:48:39,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 69 transitions, 322 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-31 16:48:39,786 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 116 flow [2024-01-31 16:48:39,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2024-01-31 16:48:39,787 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2024-01-31 16:48:39,787 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 116 flow [2024-01-31 16:48:39,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:39,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:39,788 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:39,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:48:39,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:48:39,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash -398684813, now seen corresponding path program 1 times [2024-01-31 16:48:39,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:39,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136325030] [2024-01-31 16:48:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:39,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:40,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:40,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136325030] [2024-01-31 16:48:40,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136325030] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:40,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31740002] [2024-01-31 16:48:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:40,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:40,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:40,650 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) [2024-01-31 16:48:40,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:48:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:40,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:48:40,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:41,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 71 [2024-01-31 16:48:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:41,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:42,930 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 16:48:42,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 83 [2024-01-31 16:48:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:43,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31740002] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:43,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:43,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 29 [2024-01-31 16:48:43,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936043277] [2024-01-31 16:48:43,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:43,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:48:43,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:43,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:48:43,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:48:43,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:48:43,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 116 flow. Second operand has 29 states, 29 states have (on average 9.620689655172415) internal successors, (279), 29 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:43,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:43,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:48:43,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:46,451 INFO L124 PetriNetUnfolderBase]: 3104/4916 cut-off events. [2024-01-31 16:48:46,451 INFO L125 PetriNetUnfolderBase]: For 1667/1667 co-relation queries the response was YES. [2024-01-31 16:48:46,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11303 conditions, 4916 events. 3104/4916 cut-off events. For 1667/1667 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 29242 event pairs, 477 based on Foata normal form. 5/4562 useless extension candidates. Maximal degree in co-relation 11292. Up to 1070 conditions per place. [2024-01-31 16:48:46,471 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 184 selfloop transitions, 49 changer transitions 39/276 dead transitions. [2024-01-31 16:48:46,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 276 transitions, 1310 flow [2024-01-31 16:48:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:48:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:48:46,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 448 transitions. [2024-01-31 16:48:46,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47157894736842104 [2024-01-31 16:48:46,475 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 116 flow. Second operand 25 states and 448 transitions. [2024-01-31 16:48:46,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 276 transitions, 1310 flow [2024-01-31 16:48:46,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 276 transitions, 1287 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-31 16:48:46,482 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 524 flow [2024-01-31 16:48:46,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=524, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2024-01-31 16:48:46,484 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 47 predicate places. [2024-01-31 16:48:46,484 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 524 flow [2024-01-31 16:48:46,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.620689655172415) internal successors, (279), 29 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:46,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:46,484 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:46,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:46,696 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,SelfDestructingSolverStorable5 [2024-01-31 16:48:46,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:48:46,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:46,697 INFO L85 PathProgramCache]: Analyzing trace with hash -287289363, now seen corresponding path program 2 times [2024-01-31 16:48:46,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:46,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359455608] [2024-01-31 16:48:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:46,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:47,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:47,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359455608] [2024-01-31 16:48:47,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359455608] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:47,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668639496] [2024-01-31 16:48:47,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:48:47,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:47,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:47,613 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) [2024-01-31 16:48:47,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:48:47,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:48:47,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:47,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 16:48:47,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:48,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 82 [2024-01-31 16:48:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:48,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:49,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:49,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 76 [2024-01-31 16:48:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:49,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668639496] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:49,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:49,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 31 [2024-01-31 16:48:49,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987618775] [2024-01-31 16:48:49,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:49,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 16:48:49,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 16:48:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2024-01-31 16:48:49,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:48:49,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 524 flow. Second operand has 31 states, 31 states have (on average 9.419354838709678) internal successors, (292), 31 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:49,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:49,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:48:49,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:56,488 INFO L124 PetriNetUnfolderBase]: 8622/13867 cut-off events. [2024-01-31 16:48:56,489 INFO L125 PetriNetUnfolderBase]: For 60433/60536 co-relation queries the response was YES. [2024-01-31 16:48:56,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51838 conditions, 13867 events. 8622/13867 cut-off events. For 60433/60536 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 100294 event pairs, 809 based on Foata normal form. 25/13854 useless extension candidates. Maximal degree in co-relation 51811. Up to 2161 conditions per place. [2024-01-31 16:48:56,641 INFO L140 encePairwiseOnDemand]: 25/38 looper letters, 435 selfloop transitions, 247 changer transitions 71/757 dead transitions. [2024-01-31 16:48:56,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 757 transitions, 6068 flow [2024-01-31 16:48:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-01-31 16:48:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-01-31 16:48:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 988 transitions. [2024-01-31 16:48:56,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-31 16:48:56,645 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 524 flow. Second operand 65 states and 988 transitions. [2024-01-31 16:48:56,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 757 transitions, 6068 flow [2024-01-31 16:48:56,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 757 transitions, 5770 flow, removed 103 selfloop flow, removed 9 redundant places. [2024-01-31 16:48:56,899 INFO L231 Difference]: Finished difference. Result has 170 places, 329 transitions, 3386 flow [2024-01-31 16:48:56,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3386, PETRI_PLACES=170, PETRI_TRANSITIONS=329} [2024-01-31 16:48:56,900 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 133 predicate places. [2024-01-31 16:48:56,911 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 329 transitions, 3386 flow [2024-01-31 16:48:56,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.419354838709678) internal successors, (292), 31 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:56,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:56,912 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:56,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:57,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:57,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:48:57,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:57,124 INFO L85 PathProgramCache]: Analyzing trace with hash 860505751, now seen corresponding path program 3 times [2024-01-31 16:48:57,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:57,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152422532] [2024-01-31 16:48:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:57,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:57,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:57,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152422532] [2024-01-31 16:48:57,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152422532] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:57,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076790789] [2024-01-31 16:48:57,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:48:57,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:57,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:57,831 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) [2024-01-31 16:48:57,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:48:57,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:48:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:57,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:48:57,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:58,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 68 [2024-01-31 16:48:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:58,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:59,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:59,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 108 [2024-01-31 16:48:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:48:59,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076790789] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:59,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:59,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2024-01-31 16:48:59,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120089230] [2024-01-31 16:48:59,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:59,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:48:59,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:48:59,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:48:59,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:48:59,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 329 transitions, 3386 flow. Second operand has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:59,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:59,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:48:59,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:08,408 INFO L124 PetriNetUnfolderBase]: 16789/27001 cut-off events. [2024-01-31 16:49:08,408 INFO L125 PetriNetUnfolderBase]: For 433468/433590 co-relation queries the response was YES. [2024-01-31 16:49:08,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146473 conditions, 27001 events. 16789/27001 cut-off events. For 433468/433590 co-relation queries the response was YES. Maximal size of possible extension queue 1390. Compared 216011 event pairs, 1871 based on Foata normal form. 40/26991 useless extension candidates. Maximal degree in co-relation 146417. Up to 4783 conditions per place. [2024-01-31 16:49:08,690 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 640 selfloop transitions, 546 changer transitions 131/1321 dead transitions. [2024-01-31 16:49:08,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 1321 transitions, 15760 flow [2024-01-31 16:49:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-01-31 16:49:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-01-31 16:49:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 985 transitions. [2024-01-31 16:49:08,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050164473684211 [2024-01-31 16:49:08,695 INFO L175 Difference]: Start difference. First operand has 170 places, 329 transitions, 3386 flow. Second operand 64 states and 985 transitions. [2024-01-31 16:49:08,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 1321 transitions, 15760 flow [2024-01-31 16:49:11,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 1321 transitions, 13873 flow, removed 913 selfloop flow, removed 10 redundant places. [2024-01-31 16:49:11,443 INFO L231 Difference]: Finished difference. Result has 255 places, 713 transitions, 8994 flow [2024-01-31 16:49:11,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=8994, PETRI_PLACES=255, PETRI_TRANSITIONS=713} [2024-01-31 16:49:11,444 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 218 predicate places. [2024-01-31 16:49:11,444 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 713 transitions, 8994 flow [2024-01-31 16:49:11,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.653846153846153) internal successors, (251), 26 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:11,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:11,445 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:11,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:11,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:11,656 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:49:11,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1439242877, now seen corresponding path program 4 times [2024-01-31 16:49:11,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:11,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827983967] [2024-01-31 16:49:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:11,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:49:12,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:12,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827983967] [2024-01-31 16:49:12,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827983967] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:12,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503868139] [2024-01-31 16:49:12,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:49:12,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:12,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:12,508 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) [2024-01-31 16:49:12,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:49:12,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:49:12,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:12,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:49:12,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:12,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 87 [2024-01-31 16:49:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:13,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:13,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:13,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 48 [2024-01-31 16:49:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:13,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503868139] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:13,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:13,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 25 [2024-01-31 16:49:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613746848] [2024-01-31 16:49:13,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:13,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:49:13,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:13,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:49:13,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:49:13,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:49:13,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 713 transitions, 8994 flow. Second operand has 25 states, 25 states have (on average 9.92) internal successors, (248), 25 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:13,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:13,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:49:13,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:20,635 INFO L124 PetriNetUnfolderBase]: 17448/28068 cut-off events. [2024-01-31 16:49:20,635 INFO L125 PetriNetUnfolderBase]: For 1066684/1066804 co-relation queries the response was YES. [2024-01-31 16:49:20,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188005 conditions, 28068 events. 17448/28068 cut-off events. For 1066684/1066804 co-relation queries the response was YES. Maximal size of possible extension queue 1427. Compared 226155 event pairs, 4484 based on Foata normal form. 58/28042 useless extension candidates. Maximal degree in co-relation 187916. Up to 7287 conditions per place. [2024-01-31 16:49:21,011 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 597 selfloop transitions, 304 changer transitions 36/941 dead transitions. [2024-01-31 16:49:21,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 941 transitions, 13955 flow [2024-01-31 16:49:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:49:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:49:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 314 transitions. [2024-01-31 16:49:21,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590643274853801 [2024-01-31 16:49:21,015 INFO L175 Difference]: Start difference. First operand has 255 places, 713 transitions, 8994 flow. Second operand 18 states and 314 transitions. [2024-01-31 16:49:21,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 941 transitions, 13955 flow [2024-01-31 16:49:27,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 941 transitions, 12612 flow, removed 670 selfloop flow, removed 10 redundant places. [2024-01-31 16:49:27,425 INFO L231 Difference]: Finished difference. Result has 253 places, 724 transitions, 8697 flow [2024-01-31 16:49:27,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=7815, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8697, PETRI_PLACES=253, PETRI_TRANSITIONS=724} [2024-01-31 16:49:27,426 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 216 predicate places. [2024-01-31 16:49:27,426 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 724 transitions, 8697 flow [2024-01-31 16:49:27,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.92) internal successors, (248), 25 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:27,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:27,427 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:27,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:27,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:27,638 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:49:27,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:27,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1706026403, now seen corresponding path program 5 times [2024-01-31 16:49:27,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:27,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111661742] [2024-01-31 16:49:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:27,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:28,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:28,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111661742] [2024-01-31 16:49:28,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111661742] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:28,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314708408] [2024-01-31 16:49:28,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:49:28,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:28,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:28,177 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) [2024-01-31 16:49:28,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:49:28,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:49:28,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:28,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-31 16:49:28,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:28,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2024-01-31 16:49:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:29,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:29,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:29,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 94 [2024-01-31 16:49:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:30,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314708408] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:30,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:30,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2024-01-31 16:49:30,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939709050] [2024-01-31 16:49:30,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:30,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:49:30,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:30,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:49:30,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:49:30,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:49:30,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 724 transitions, 8697 flow. Second operand has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 26 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:30,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:30,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:49:30,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:38,296 INFO L124 PetriNetUnfolderBase]: 18543/29667 cut-off events. [2024-01-31 16:49:38,296 INFO L125 PetriNetUnfolderBase]: For 893861/893924 co-relation queries the response was YES. [2024-01-31 16:49:38,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182130 conditions, 29667 events. 18543/29667 cut-off events. For 893861/893924 co-relation queries the response was YES. Maximal size of possible extension queue 1533. Compared 240379 event pairs, 5284 based on Foata normal form. 46/29639 useless extension candidates. Maximal degree in co-relation 182048. Up to 13989 conditions per place. [2024-01-31 16:49:38,799 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 642 selfloop transitions, 322 changer transitions 39/1007 dead transitions. [2024-01-31 16:49:38,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 1007 transitions, 14572 flow [2024-01-31 16:49:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:49:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:49:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 322 transitions. [2024-01-31 16:49:38,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47076023391812866 [2024-01-31 16:49:38,801 INFO L175 Difference]: Start difference. First operand has 253 places, 724 transitions, 8697 flow. Second operand 18 states and 322 transitions. [2024-01-31 16:49:38,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 1007 transitions, 14572 flow [2024-01-31 16:49:42,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1007 transitions, 14229 flow, removed 119 selfloop flow, removed 12 redundant places. [2024-01-31 16:49:42,901 INFO L231 Difference]: Finished difference. Result has 261 places, 791 transitions, 10223 flow [2024-01-31 16:49:42,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=8540, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10223, PETRI_PLACES=261, PETRI_TRANSITIONS=791} [2024-01-31 16:49:42,902 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 224 predicate places. [2024-01-31 16:49:42,902 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 791 transitions, 10223 flow [2024-01-31 16:49:42,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 26 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:42,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:42,902 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:42,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:43,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:43,114 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:49:43,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash 200962077, now seen corresponding path program 6 times [2024-01-31 16:49:43,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:43,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195071822] [2024-01-31 16:49:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:43,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:43,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:43,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195071822] [2024-01-31 16:49:43,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195071822] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:43,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790313835] [2024-01-31 16:49:43,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:49:43,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:43,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:43,741 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) [2024-01-31 16:49:43,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:49:43,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:49:43,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:43,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:49:43,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:44,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 67 [2024-01-31 16:49:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:44,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:45,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:45,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 121 [2024-01-31 16:49:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 16:49:45,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790313835] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:45,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:45,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2024-01-31 16:49:45,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395924452] [2024-01-31 16:49:45,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:45,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:49:45,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:49:45,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:49:45,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-01-31 16:49:45,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 791 transitions, 10223 flow. Second operand has 28 states, 28 states have (on average 9.464285714285714) internal successors, (265), 28 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:45,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:45,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-01-31 16:49:45,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:59,597 INFO L124 PetriNetUnfolderBase]: 27129/44715 cut-off events. [2024-01-31 16:49:59,597 INFO L125 PetriNetUnfolderBase]: For 1245735/1245848 co-relation queries the response was YES. [2024-01-31 16:50:00,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277367 conditions, 44715 events. 27129/44715 cut-off events. For 1245735/1245848 co-relation queries the response was YES. Maximal size of possible extension queue 2225. Compared 391076 event pairs, 4866 based on Foata normal form. 60/44689 useless extension candidates. Maximal degree in co-relation 277282. Up to 7927 conditions per place. [2024-01-31 16:50:00,539 INFO L140 encePairwiseOnDemand]: 26/38 looper letters, 756 selfloop transitions, 705 changer transitions 81/1546 dead transitions. [2024-01-31 16:50:00,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1546 transitions, 22806 flow [2024-01-31 16:50:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 16:50:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 16:50:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 664 transitions. [2024-01-31 16:50:00,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44804318488529016 [2024-01-31 16:50:00,543 INFO L175 Difference]: Start difference. First operand has 261 places, 791 transitions, 10223 flow. Second operand 39 states and 664 transitions. [2024-01-31 16:50:00,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1546 transitions, 22806 flow