./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/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/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a1634bb3c8fd20e3116589f39b7439eb06d3d5864b5afee415eff1cf39cd7c4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:28:52,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:28:52,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:28:52,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:28:52,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:28:52,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:28:52,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:28:52,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:28:52,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:28:52,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:28:52,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:28:52,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:28:52,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:28:52,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:28:52,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:28:52,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:28:52,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:28:52,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:28:52,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:28:52,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:28:52,847 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:28:52,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:28:52,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:28:52,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:28:52,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:28:52,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:28:52,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:28:52,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:28:52,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:28:52,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:28:52,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:28:52,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:28:52,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:28:52,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:28:52,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:28:52,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:28:52,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:28:52,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:28:52,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:28:52,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:28:52,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:28:52,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:28:52,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:28:52,922 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:28:52,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:28:52,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:28:52,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:28:52,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:28:52,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:28:52,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:28:52,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:28:52,925 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:28:52,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:28:52,925 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:28:52,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:28:52,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:28:52,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:28:52,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:28:52,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:28:52,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:28:52,927 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:28:52,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:28:52,936 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:28:52,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:28:52,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:28:52,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:28:52,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:28:52,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:28:52,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:28:52,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:28:52,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:28:52,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:28:52,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:28:52,938 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:28:52,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:28:52,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:28:52,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a1634bb3c8fd20e3116589f39b7439eb06d3d5864b5afee415eff1cf39cd7c4 [2022-07-22 21:28:53,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:28:53,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:28:53,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:28:53,183 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:28:53,184 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:28:53,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i [2022-07-22 21:28:53,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/174e97cbd/505caf97256e45cc854b86837d3081fb/FLAG157f207cf [2022-07-22 21:28:53,774 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:28:53,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i [2022-07-22 21:28:53,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/174e97cbd/505caf97256e45cc854b86837d3081fb/FLAG157f207cf [2022-07-22 21:28:54,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/174e97cbd/505caf97256e45cc854b86837d3081fb [2022-07-22 21:28:54,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:28:54,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:28:54,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:28:54,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:28:54,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:28:54,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:28:54" (1/1) ... [2022-07-22 21:28:54,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cce5b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:54, skipping insertion in model container [2022-07-22 21:28:54,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:28:54" (1/1) ... [2022-07-22 21:28:54,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:28:54,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:28:54,792 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[76469,76482] [2022-07-22 21:28:54,845 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[79042,79055] [2022-07-22 21:28:54,849 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[79451,79464] [2022-07-22 21:28:54,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:28:54,884 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:28:54,946 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[76469,76482] [2022-07-22 21:28:54,959 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[79042,79055] [2022-07-22 21:28:54,962 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[79451,79464] [2022-07-22 21:28:54,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:28:55,072 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:28:55,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55 WrapperNode [2022-07-22 21:28:55,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:28:55,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:28:55,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:28:55,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:28:55,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (1/1) ... [2022-07-22 21:28:55,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (1/1) ... [2022-07-22 21:28:55,219 INFO L137 Inliner]: procedures = 489, calls = 128, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1729 [2022-07-22 21:28:55,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:28:55,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:28:55,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:28:55,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:28:55,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (1/1) ... [2022-07-22 21:28:55,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (1/1) ... [2022-07-22 21:28:55,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (1/1) ... [2022-07-22 21:28:55,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (1/1) ... [2022-07-22 21:28:55,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (1/1) ... [2022-07-22 21:28:55,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (1/1) ... [2022-07-22 21:28:55,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (1/1) ... [2022-07-22 21:28:55,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:28:55,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:28:55,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:28:55,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:28:55,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (1/1) ... [2022-07-22 21:28:55,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:28:55,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:28:55,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:28:55,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:28:55,484 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2022-07-22 21:28:55,485 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2022-07-22 21:28:55,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:28:55,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:28:55,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:28:55,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:28:55,486 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:28:55,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:28:55,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 21:28:55,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:28:55,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:28:55,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:28:55,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 21:28:55,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:28:55,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:28:55,490 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:28:55,790 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:28:55,791 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:28:57,417 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:28:57,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:28:57,730 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-22 21:28:57,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:28:57 BoogieIcfgContainer [2022-07-22 21:28:57,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:28:57,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:28:57,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:28:57,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:28:57,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:28:54" (1/3) ... [2022-07-22 21:28:57,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e80d588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:28:57, skipping insertion in model container [2022-07-22 21:28:57,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:28:55" (2/3) ... [2022-07-22 21:28:57,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e80d588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:28:57, skipping insertion in model container [2022-07-22 21:28:57,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:28:57" (3/3) ... [2022-07-22 21:28:57,742 INFO L111 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-1.i [2022-07-22 21:28:57,748 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:28:57,757 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:28:57,758 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-07-22 21:28:57,758 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:28:57,896 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:28:57,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1635 places, 1684 transitions, 3376 flow [2022-07-22 21:28:58,873 INFO L129 PetriNetUnfolder]: 97/3125 cut-off events. [2022-07-22 21:28:58,874 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:28:58,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 3125 events. 97/3125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14514 event pairs, 0 based on Foata normal form. 0/3015 useless extension candidates. Maximal degree in co-relation 1594. Up to 10 conditions per place. [2022-07-22 21:28:58,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 1635 places, 1684 transitions, 3376 flow [2022-07-22 21:28:58,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1635 places, 1684 transitions, 3376 flow [2022-07-22 21:28:58,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:28:58,969 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@265eaa72, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9c155ee [2022-07-22 21:28:58,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:28:58,990 INFO L129 PetriNetUnfolder]: 11/171 cut-off events. [2022-07-22 21:28:58,990 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:28:58,991 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:28:58,992 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:28:58,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:28:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:28:58,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1789532269, now seen corresponding path program 1 times [2022-07-22 21:28:59,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:28:59,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464321733] [2022-07-22 21:28:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:28:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:28:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:28:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:28:59,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:28:59,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464321733] [2022-07-22 21:28:59,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464321733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:28:59,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:28:59,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:28:59,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645853883] [2022-07-22 21:28:59,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:28:59,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:28:59,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:28:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:28:59,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:28:59,545 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1611 out of 1684 [2022-07-22 21:28:59,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1635 places, 1684 transitions, 3376 flow. Second operand has 2 states, 2 states have (on average 1613.0) internal successors, (3226), 2 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:28:59,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:28:59,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1611 of 1684 [2022-07-22 21:28:59,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:29:02,140 INFO L129 PetriNetUnfolder]: 384/9309 cut-off events. [2022-07-22 21:29:02,140 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:29:02,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9783 conditions, 9309 events. 384/9309 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 79211 event pairs, 176 based on Foata normal form. 161/9221 useless extension candidates. Maximal degree in co-relation 8217. Up to 468 conditions per place. [2022-07-22 21:29:02,229 INFO L132 encePairwiseOnDemand]: 1668/1684 looper letters, 52 selfloop transitions, 0 changer transitions 0/1663 dead transitions. [2022-07-22 21:29:02,229 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1631 places, 1663 transitions, 3438 flow [2022-07-22 21:29:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:29:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:29:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3290 transitions. [2022-07-22 21:29:02,250 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9768408551068883 [2022-07-22 21:29:02,251 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3290 transitions. [2022-07-22 21:29:02,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3290 transitions. [2022-07-22 21:29:02,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:29:02,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3290 transitions. [2022-07-22 21:29:02,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1645.0) internal successors, (3290), 2 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:02,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:02,285 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:02,287 INFO L186 Difference]: Start difference. First operand has 1635 places, 1684 transitions, 3376 flow. Second operand 2 states and 3290 transitions. [2022-07-22 21:29:02,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1631 places, 1663 transitions, 3438 flow [2022-07-22 21:29:02,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1631 places, 1663 transitions, 3438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:29:02,334 INFO L242 Difference]: Finished difference. Result has 1631 places, 1663 transitions, 3334 flow [2022-07-22 21:29:02,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3334, PETRI_PLACES=1631, PETRI_TRANSITIONS=1663} [2022-07-22 21:29:02,342 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, -4 predicate places. [2022-07-22 21:29:02,343 INFO L495 AbstractCegarLoop]: Abstraction has has 1631 places, 1663 transitions, 3334 flow [2022-07-22 21:29:02,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1613.0) internal successors, (3226), 2 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:02,345 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:02,346 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:29:02,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:29:02,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:29:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:02,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1152125330, now seen corresponding path program 1 times [2022-07-22 21:29:02,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:02,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016506490] [2022-07-22 21:29:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:02,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:29:02,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:29:02,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016506490] [2022-07-22 21:29:02,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016506490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:29:02,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:29:02,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:29:02,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481557867] [2022-07-22 21:29:02,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:29:02,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:29:02,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:29:02,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:29:02,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:29:02,547 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1573 out of 1684 [2022-07-22 21:29:02,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1631 places, 1663 transitions, 3334 flow. Second operand has 3 states, 3 states have (on average 1577.0) internal successors, (4731), 3 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:02,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:29:02,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1573 of 1684 [2022-07-22 21:29:02,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:29:07,408 INFO L129 PetriNetUnfolder]: 751/14656 cut-off events. [2022-07-22 21:29:07,409 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:29:07,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 14656 events. 751/14656 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 130291 event pairs, 224 based on Foata normal form. 0/14284 useless extension candidates. Maximal degree in co-relation 15738. Up to 553 conditions per place. [2022-07-22 21:29:07,543 INFO L132 encePairwiseOnDemand]: 1666/1684 looper letters, 143 selfloop transitions, 12 changer transitions 9/1731 dead transitions. [2022-07-22 21:29:07,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1633 places, 1731 transitions, 3786 flow [2022-07-22 21:29:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:29:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:29:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4883 transitions. [2022-07-22 21:29:07,557 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.966547901821061 [2022-07-22 21:29:07,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 4883 transitions. [2022-07-22 21:29:07,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 4883 transitions. [2022-07-22 21:29:07,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:29:07,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 4883 transitions. [2022-07-22 21:29:07,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1627.6666666666667) internal successors, (4883), 3 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:07,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1684.0) internal successors, (6736), 4 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:07,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1684.0) internal successors, (6736), 4 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:07,592 INFO L186 Difference]: Start difference. First operand has 1631 places, 1663 transitions, 3334 flow. Second operand 3 states and 4883 transitions. [2022-07-22 21:29:07,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1633 places, 1731 transitions, 3786 flow [2022-07-22 21:29:07,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1633 places, 1731 transitions, 3786 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:29:07,633 INFO L242 Difference]: Finished difference. Result has 1634 places, 1660 transitions, 3382 flow [2022-07-22 21:29:07,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3382, PETRI_PLACES=1634, PETRI_TRANSITIONS=1660} [2022-07-22 21:29:07,638 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, -1 predicate places. [2022-07-22 21:29:07,638 INFO L495 AbstractCegarLoop]: Abstraction has has 1634 places, 1660 transitions, 3382 flow [2022-07-22 21:29:07,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1577.0) internal successors, (4731), 3 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:07,642 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:07,642 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:29:07,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:29:07,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:29:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:07,645 INFO L85 PathProgramCache]: Analyzing trace with hash 921428864, now seen corresponding path program 1 times [2022-07-22 21:29:07,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:07,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410842676] [2022-07-22 21:29:07,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:07,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:29:07,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:29:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410842676] [2022-07-22 21:29:07,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410842676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:29:07,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769513640] [2022-07-22 21:29:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:07,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:29:07,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:29:07,855 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) [2022-07-22 21:29:07,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:29:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:08,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:29:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:29:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:29:08,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:29:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:29:08,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769513640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:29:08,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:29:08,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:29:08,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161391918] [2022-07-22 21:29:08,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:29:08,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:29:08,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:29:08,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:29:08,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:29:08,222 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1572 out of 1684 [2022-07-22 21:29:08,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1634 places, 1660 transitions, 3382 flow. Second operand has 10 states, 10 states have (on average 1574.9) internal successors, (15749), 10 states have internal predecessors, (15749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:08,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:29:08,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1572 of 1684 [2022-07-22 21:29:08,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:29:13,444 INFO L129 PetriNetUnfolder]: 869/15024 cut-off events. [2022-07-22 21:29:13,444 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-22 21:29:13,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16318 conditions, 15024 events. 869/15024 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 132378 event pairs, 174 based on Foata normal form. 2/14664 useless extension candidates. Maximal degree in co-relation 16312. Up to 577 conditions per place. [2022-07-22 21:29:13,564 INFO L132 encePairwiseOnDemand]: 1663/1684 looper letters, 141 selfloop transitions, 26 changer transitions 2/1735 dead transitions. [2022-07-22 21:29:13,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1635 places, 1735 transitions, 3872 flow [2022-07-22 21:29:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:29:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:29:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14319 transitions. [2022-07-22 21:29:13,594 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9447743467933492 [2022-07-22 21:29:13,594 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 14319 transitions. [2022-07-22 21:29:13,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 14319 transitions. [2022-07-22 21:29:13,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:29:13,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 14319 transitions. [2022-07-22 21:29:13,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1591.0) internal successors, (14319), 9 states have internal predecessors, (14319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:13,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1684.0) internal successors, (16840), 10 states have internal predecessors, (16840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:13,663 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1684.0) internal successors, (16840), 10 states have internal predecessors, (16840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:13,664 INFO L186 Difference]: Start difference. First operand has 1634 places, 1660 transitions, 3382 flow. Second operand 9 states and 14319 transitions. [2022-07-22 21:29:13,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1635 places, 1735 transitions, 3872 flow [2022-07-22 21:29:13,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1634 places, 1735 transitions, 3860 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:29:13,698 INFO L242 Difference]: Finished difference. Result has 1637 places, 1670 transitions, 3496 flow [2022-07-22 21:29:13,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=1626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=1637, PETRI_TRANSITIONS=1670} [2022-07-22 21:29:13,703 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, 2 predicate places. [2022-07-22 21:29:13,704 INFO L495 AbstractCegarLoop]: Abstraction has has 1637 places, 1670 transitions, 3496 flow [2022-07-22 21:29:13,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1574.9) internal successors, (15749), 10 states have internal predecessors, (15749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:13,709 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:13,709 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:29:13,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:29:13,931 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 [2022-07-22 21:29:13,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:29:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash -613101020, now seen corresponding path program 2 times [2022-07-22 21:29:13,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:13,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569006888] [2022-07-22 21:29:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:13,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:29:14,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:29:14,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569006888] [2022-07-22 21:29:14,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569006888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:29:14,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168828957] [2022-07-22 21:29:14,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:29:14,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:29:14,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:29:14,144 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) [2022-07-22 21:29:14,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:29:14,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:29:14,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:29:14,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:29:14,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:29:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:29:14,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:29:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:29:14,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168828957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:29:14,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:29:14,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-22 21:29:14,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536643421] [2022-07-22 21:29:14,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:29:14,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:29:14,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:29:14,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:29:14,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:29:14,700 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1572 out of 1684 [2022-07-22 21:29:14,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1637 places, 1670 transitions, 3496 flow. Second operand has 11 states, 11 states have (on average 1574.909090909091) internal successors, (17324), 11 states have internal predecessors, (17324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:14,711 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:29:14,711 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1572 of 1684 [2022-07-22 21:29:14,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:29:20,319 INFO L129 PetriNetUnfolder]: 793/16490 cut-off events. [2022-07-22 21:29:20,320 INFO L130 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-07-22 21:29:20,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17857 conditions, 16490 events. 793/16490 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 148205 event pairs, 420 based on Foata normal form. 1/16097 useless extension candidates. Maximal degree in co-relation 17849. Up to 523 conditions per place. [2022-07-22 21:29:20,430 INFO L132 encePairwiseOnDemand]: 1664/1684 looper letters, 143 selfloop transitions, 29 changer transitions 0/1738 dead transitions. [2022-07-22 21:29:20,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1648 places, 1738 transitions, 3994 flow [2022-07-22 21:29:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:29:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:29:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 19037 transitions. [2022-07-22 21:29:20,464 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9420526524148852 [2022-07-22 21:29:20,464 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 19037 transitions. [2022-07-22 21:29:20,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 19037 transitions. [2022-07-22 21:29:20,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:29:20,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 19037 transitions. [2022-07-22 21:29:20,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 1586.4166666666667) internal successors, (19037), 12 states have internal predecessors, (19037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:20,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1684.0) internal successors, (21892), 13 states have internal predecessors, (21892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:20,543 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1684.0) internal successors, (21892), 13 states have internal predecessors, (21892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:20,544 INFO L186 Difference]: Start difference. First operand has 1637 places, 1670 transitions, 3496 flow. Second operand 12 states and 19037 transitions. [2022-07-22 21:29:20,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1648 places, 1738 transitions, 3994 flow [2022-07-22 21:29:20,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1647 places, 1738 transitions, 3970 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:29:20,589 INFO L242 Difference]: Finished difference. Result has 1651 places, 1674 transitions, 3589 flow [2022-07-22 21:29:20,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=1636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3589, PETRI_PLACES=1651, PETRI_TRANSITIONS=1674} [2022-07-22 21:29:20,594 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, 16 predicate places. [2022-07-22 21:29:20,594 INFO L495 AbstractCegarLoop]: Abstraction has has 1651 places, 1674 transitions, 3589 flow [2022-07-22 21:29:20,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1574.909090909091) internal successors, (17324), 11 states have internal predecessors, (17324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:20,600 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:20,600 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:29:20,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:29:20,815 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,SelfDestructingSolverStorable3 [2022-07-22 21:29:20,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:29:20,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:20,816 INFO L85 PathProgramCache]: Analyzing trace with hash 781063094, now seen corresponding path program 3 times [2022-07-22 21:29:20,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:20,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809959412] [2022-07-22 21:29:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:29:20,917 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:29:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:29:21,050 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:29:21,051 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:29:21,054 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-22 21:29:21,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-22 21:29:21,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-22 21:29:21,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-22 21:29:21,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-22 21:29:21,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-22 21:29:21,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:29:21,060 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-07-22 21:29:21,063 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:29:21,063 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:29:21,207 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:29:21,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1782 places, 1834 transitions, 3686 flow [2022-07-22 21:29:22,506 INFO L129 PetriNetUnfolder]: 152/4761 cut-off events. [2022-07-22 21:29:22,507 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:29:22,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4775 conditions, 4761 events. 152/4761 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 27568 event pairs, 0 based on Foata normal form. 0/4589 useless extension candidates. Maximal degree in co-relation 3127. Up to 15 conditions per place. [2022-07-22 21:29:22,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 1782 places, 1834 transitions, 3686 flow [2022-07-22 21:29:22,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1782 places, 1834 transitions, 3686 flow [2022-07-22 21:29:22,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:29:22,602 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@265eaa72, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9c155ee [2022-07-22 21:29:22,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:29:22,613 INFO L129 PetriNetUnfolder]: 13/197 cut-off events. [2022-07-22 21:29:22,614 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:29:22,614 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:22,614 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:29:22,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:29:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:22,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1187252170, now seen corresponding path program 1 times [2022-07-22 21:29:22,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:22,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001278908] [2022-07-22 21:29:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:22,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:29:22,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:29:22,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001278908] [2022-07-22 21:29:22,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001278908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:29:22,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:29:22,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:29:22,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009545177] [2022-07-22 21:29:22,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:29:22,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:29:22,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:29:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:29:22,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:29:22,678 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1754 out of 1834 [2022-07-22 21:29:22,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1782 places, 1834 transitions, 3686 flow. Second operand has 2 states, 2 states have (on average 1756.0) internal successors, (3512), 2 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:22,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:29:22,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1754 of 1834 [2022-07-22 21:29:22,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:29:35,247 INFO L129 PetriNetUnfolder]: 3062/49401 cut-off events. [2022-07-22 21:29:35,248 INFO L130 PetriNetUnfolder]: For 73/77 co-relation queries the response was YES. [2022-07-22 21:29:35,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52938 conditions, 49401 events. 3062/49401 cut-off events. For 73/77 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 640460 event pairs, 1964 based on Foata normal form. 1133/49213 useless extension candidates. Maximal degree in co-relation 9703. Up to 3491 conditions per place. [2022-07-22 21:29:35,900 INFO L132 encePairwiseOnDemand]: 1817/1834 looper letters, 58 selfloop transitions, 0 changer transitions 0/1812 dead transitions. [2022-07-22 21:29:35,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1778 places, 1812 transitions, 3758 flow [2022-07-22 21:29:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:29:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:29:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3583 transitions. [2022-07-22 21:29:35,907 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9768266085059978 [2022-07-22 21:29:35,907 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3583 transitions. [2022-07-22 21:29:35,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3583 transitions. [2022-07-22 21:29:35,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:29:35,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3583 transitions. [2022-07-22 21:29:35,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1791.5) internal successors, (3583), 2 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:35,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1834.0) internal successors, (5502), 3 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:35,919 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1834.0) internal successors, (5502), 3 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:35,919 INFO L186 Difference]: Start difference. First operand has 1782 places, 1834 transitions, 3686 flow. Second operand 2 states and 3583 transitions. [2022-07-22 21:29:35,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1778 places, 1812 transitions, 3758 flow [2022-07-22 21:29:35,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1778 places, 1812 transitions, 3758 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:29:35,952 INFO L242 Difference]: Finished difference. Result has 1778 places, 1812 transitions, 3642 flow [2022-07-22 21:29:35,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1834, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=1777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3642, PETRI_PLACES=1778, PETRI_TRANSITIONS=1812} [2022-07-22 21:29:35,960 INFO L279 CegarLoopForPetriNet]: 1782 programPoint places, -4 predicate places. [2022-07-22 21:29:35,962 INFO L495 AbstractCegarLoop]: Abstraction has has 1778 places, 1812 transitions, 3642 flow [2022-07-22 21:29:35,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1756.0) internal successors, (3512), 2 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:35,963 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:29:35,963 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:29:35,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:29:35,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-22 21:29:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:29:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash -903102196, now seen corresponding path program 1 times [2022-07-22 21:29:35,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:29:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928599622] [2022-07-22 21:29:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:29:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:29:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:29:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:29:36,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:29:36,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928599622] [2022-07-22 21:29:36,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928599622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:29:36,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:29:36,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:29:36,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897835646] [2022-07-22 21:29:36,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:29:36,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:29:36,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:29:36,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:29:36,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:29:36,043 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1716 out of 1834 [2022-07-22 21:29:36,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1778 places, 1812 transitions, 3642 flow. Second operand has 3 states, 3 states have (on average 1721.6666666666667) internal successors, (5165), 3 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:29:36,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:29:36,047 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1716 of 1834 [2022-07-22 21:29:36,047 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand