./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-nondet/nondet-loop-bound-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 cdf629ba70521b99830442583c87012a34d164ca28f01f7e59d76ae2f1e525ff --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:13:53,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:13:53,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:13:53,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:13:53,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:13:53,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:13:53,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:13:53,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:13:53,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:13:53,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:13:53,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:13:53,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:13:53,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:13:53,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:13:53,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:13:53,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:13:53,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:13:53,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:13:53,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:13:53,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:13:53,684 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:13:53,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:13:53,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:13:53,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:13:53,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:13:53,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:13:53,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:13:53,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:13:53,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:13:53,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:13:53,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:13:53,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:13:53,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:13:53,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:13:53,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:13:53,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:13:53,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:13:53,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:13:53,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:13:53,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:13:53,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:13:53,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:13:53,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:13:53,719 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:13:53,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:13:53,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:13:53,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:13:53,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:13:53,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:13:53,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:13:53,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:13:53,721 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:13:53,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:13:53,722 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:13:53,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:13:53,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:13:53,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:13:53,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:13:53,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:13:53,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:13:53,723 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:13:53,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:13:53,723 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:13:53,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:13:53,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:13:53,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:13:53,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:13:53,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:13:53,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:13:53,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:13:53,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:13:53,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:13:53,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:13:53,725 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:13:53,725 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:13:53,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:13:53,725 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdf629ba70521b99830442583c87012a34d164ca28f01f7e59d76ae2f1e525ff [2022-07-12 10:13:53,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:13:53,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:13:53,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:13:53,907 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:13:53,908 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:13:53,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i [2022-07-12 10:13:53,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b8c08e2/f671563180124aa7b2110dc06314bf18/FLAGdee01bd05 [2022-07-12 10:13:54,292 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:13:54,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i [2022-07-12 10:13:54,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b8c08e2/f671563180124aa7b2110dc06314bf18/FLAGdee01bd05 [2022-07-12 10:13:54,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b8c08e2/f671563180124aa7b2110dc06314bf18 [2022-07-12 10:13:54,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:13:54,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:13:54,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:13:54,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:13:54,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:13:54,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:13:54" (1/1) ... [2022-07-12 10:13:54,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10780391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:54, skipping insertion in model container [2022-07-12 10:13:54,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:13:54" (1/1) ... [2022-07-12 10:13:54,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:13:54,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:13:54,971 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-nondet/nondet-loop-bound-1.i[30035,30048] [2022-07-12 10:13:54,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:13:54,993 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:13:55,030 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-nondet/nondet-loop-bound-1.i[30035,30048] [2022-07-12 10:13:55,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:13:55,065 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:13:55,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55 WrapperNode [2022-07-12 10:13:55,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:13:55,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:13:55,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:13:55,067 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:13:55,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (1/1) ... [2022-07-12 10:13:55,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (1/1) ... [2022-07-12 10:13:55,109 INFO L137 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2022-07-12 10:13:55,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:13:55,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:13:55,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:13:55,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:13:55,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (1/1) ... [2022-07-12 10:13:55,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (1/1) ... [2022-07-12 10:13:55,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (1/1) ... [2022-07-12 10:13:55,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (1/1) ... [2022-07-12 10:13:55,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (1/1) ... [2022-07-12 10:13:55,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (1/1) ... [2022-07-12 10:13:55,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (1/1) ... [2022-07-12 10:13:55,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:13:55,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:13:55,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:13:55,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:13:55,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (1/1) ... [2022-07-12 10:13:55,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:13:55,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:55,153 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) [2022-07-12 10:13:55,154 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 [2022-07-12 10:13:55,174 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-12 10:13:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-12 10:13:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-12 10:13:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-12 10:13:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:13:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:13:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:13:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:13:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:13:55,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:13:55,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:13:55,177 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:13:55,264 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:13:55,265 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:13:55,388 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:13:55,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:13:55,392 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 10:13:55,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:13:55 BoogieIcfgContainer [2022-07-12 10:13:55,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:13:55,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:13:55,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:13:55,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:13:55,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:13:54" (1/3) ... [2022-07-12 10:13:55,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3a33e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:13:55, skipping insertion in model container [2022-07-12 10:13:55,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:55" (2/3) ... [2022-07-12 10:13:55,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3a33e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:13:55, skipping insertion in model container [2022-07-12 10:13:55,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:13:55" (3/3) ... [2022-07-12 10:13:55,400 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-loop-bound-1.i [2022-07-12 10:13:55,403 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:13:55,409 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:13:55,409 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:13:55,409 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:13:55,437 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:13:55,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 80 places, 77 transitions, 164 flow [2022-07-12 10:13:55,481 INFO L129 PetriNetUnfolder]: 4/90 cut-off events. [2022-07-12 10:13:55,481 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:13:55,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 90 events. 4/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2022-07-12 10:13:55,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 77 transitions, 164 flow [2022-07-12 10:13:55,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 160 flow [2022-07-12 10:13:55,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:13:55,499 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@4a27734a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@765c77e [2022-07-12 10:13:55,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:13:55,514 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2022-07-12 10:13:55,514 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:13:55,514 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:55,515 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] [2022-07-12 10:13:55,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:13:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:55,518 INFO L85 PathProgramCache]: Analyzing trace with hash 25235032, now seen corresponding path program 1 times [2022-07-12 10:13:55,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:55,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601987644] [2022-07-12 10:13:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:55,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:55,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:55,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601987644] [2022-07-12 10:13:55,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601987644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:55,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:55,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:13:55,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828234061] [2022-07-12 10:13:55,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:55,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:13:55,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:55,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:13:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:13:55,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-12 10:13:55,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 54.625) internal successors, (437), 8 states have internal predecessors, (437), 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) [2022-07-12 10:13:55,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:55,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-12 10:13:55,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:56,077 INFO L129 PetriNetUnfolder]: 71/256 cut-off events. [2022-07-12 10:13:56,077 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:13:56,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 256 events. 71/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1313 event pairs, 2 based on Foata normal form. 4/229 useless extension candidates. Maximal degree in co-relation 378. Up to 38 conditions per place. [2022-07-12 10:13:56,079 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 28 selfloop transitions, 11 changer transitions 6/97 dead transitions. [2022-07-12 10:13:56,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 97 transitions, 298 flow [2022-07-12 10:13:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:13:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:13:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 639 transitions. [2022-07-12 10:13:56,090 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7544273907910272 [2022-07-12 10:13:56,091 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 639 transitions. [2022-07-12 10:13:56,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 639 transitions. [2022-07-12 10:13:56,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:56,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 639 transitions. [2022-07-12 10:13:56,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.09090909090909) internal successors, (639), 11 states have internal predecessors, (639), 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) [2022-07-12 10:13:56,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 77.0) internal successors, (924), 12 states have internal predecessors, (924), 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) [2022-07-12 10:13:56,102 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 77.0) internal successors, (924), 12 states have internal predecessors, (924), 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) [2022-07-12 10:13:56,103 INFO L186 Difference]: Start difference. First operand has 79 places, 76 transitions, 160 flow. Second operand 11 states and 639 transitions. [2022-07-12 10:13:56,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 97 transitions, 298 flow [2022-07-12 10:13:56,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 97 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:56,113 INFO L242 Difference]: Finished difference. Result has 91 places, 77 transitions, 203 flow [2022-07-12 10:13:56,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=203, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2022-07-12 10:13:56,117 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2022-07-12 10:13:56,119 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 203 flow [2022-07-12 10:13:56,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 54.625) internal successors, (437), 8 states have internal predecessors, (437), 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) [2022-07-12 10:13:56,119 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:56,120 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] [2022-07-12 10:13:56,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:13:56,120 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:13:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:56,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1080909318, now seen corresponding path program 1 times [2022-07-12 10:13:56,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:56,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449637507] [2022-07-12 10:13:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:56,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:13:56,165 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:13:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:13:56,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:13:56,196 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:13:56,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-12 10:13:56,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-12 10:13:56,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-12 10:13:56,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-12 10:13:56,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:13:56,201 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:13:56,203 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:13:56,203 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:13:56,215 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:13:56,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 102 places, 96 transitions, 216 flow [2022-07-12 10:13:56,227 INFO L129 PetriNetUnfolder]: 5/115 cut-off events. [2022-07-12 10:13:56,227 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:13:56,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 115 events. 5/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 124. Up to 6 conditions per place. [2022-07-12 10:13:56,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 96 transitions, 216 flow [2022-07-12 10:13:56,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 82 transitions, 179 flow [2022-07-12 10:13:56,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:13:56,231 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@4a27734a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@765c77e [2022-07-12 10:13:56,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:13:56,234 INFO L129 PetriNetUnfolder]: 3/55 cut-off events. [2022-07-12 10:13:56,235 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:13:56,235 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:56,235 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] [2022-07-12 10:13:56,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:13:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:56,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1995614165, now seen corresponding path program 1 times [2022-07-12 10:13:56,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:56,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074402777] [2022-07-12 10:13:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:56,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:56,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:56,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074402777] [2022-07-12 10:13:56,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074402777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:56,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:56,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:13:56,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271449942] [2022-07-12 10:13:56,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:56,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:13:56,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:56,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:13:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:13:56,336 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 96 [2022-07-12 10:13:56,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 179 flow. Second operand has 8 states, 8 states have (on average 66.625) internal successors, (533), 8 states have internal predecessors, (533), 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) [2022-07-12 10:13:56,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:56,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 96 [2022-07-12 10:13:56,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:56,563 INFO L129 PetriNetUnfolder]: 429/995 cut-off events. [2022-07-12 10:13:56,563 INFO L130 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-07-12 10:13:56,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 995 events. 429/995 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6972 event pairs, 24 based on Foata normal form. 19/894 useless extension candidates. Maximal degree in co-relation 1746. Up to 213 conditions per place. [2022-07-12 10:13:56,568 INFO L132 encePairwiseOnDemand]: 83/96 looper letters, 54 selfloop transitions, 14 changer transitions 6/129 dead transitions. [2022-07-12 10:13:56,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 129 transitions, 457 flow [2022-07-12 10:13:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:13:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:13:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 800 transitions. [2022-07-12 10:13:56,571 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2022-07-12 10:13:56,571 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 800 transitions. [2022-07-12 10:13:56,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 800 transitions. [2022-07-12 10:13:56,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:56,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 800 transitions. [2022-07-12 10:13:56,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 72.72727272727273) internal successors, (800), 11 states have internal predecessors, (800), 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) [2022-07-12 10:13:56,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 96.0) internal successors, (1152), 12 states have internal predecessors, (1152), 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) [2022-07-12 10:13:56,575 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 96.0) internal successors, (1152), 12 states have internal predecessors, (1152), 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) [2022-07-12 10:13:56,575 INFO L186 Difference]: Start difference. First operand has 87 places, 82 transitions, 179 flow. Second operand 11 states and 800 transitions. [2022-07-12 10:13:56,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 129 transitions, 457 flow [2022-07-12 10:13:56,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 454 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:56,578 INFO L242 Difference]: Finished difference. Result has 100 places, 87 transitions, 254 flow [2022-07-12 10:13:56,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=254, PETRI_PLACES=100, PETRI_TRANSITIONS=87} [2022-07-12 10:13:56,578 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 13 predicate places. [2022-07-12 10:13:56,579 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 87 transitions, 254 flow [2022-07-12 10:13:56,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.625) internal successors, (533), 8 states have internal predecessors, (533), 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) [2022-07-12 10:13:56,579 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:56,579 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] [2022-07-12 10:13:56,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:13:56,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:13:56,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:56,580 INFO L85 PathProgramCache]: Analyzing trace with hash -120525765, now seen corresponding path program 1 times [2022-07-12 10:13:56,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:56,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333388605] [2022-07-12 10:13:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:56,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:56,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:56,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333388605] [2022-07-12 10:13:56,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333388605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:56,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:56,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 10:13:56,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287364127] [2022-07-12 10:13:56,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:56,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:13:56,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:56,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:13:56,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:13:56,694 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 96 [2022-07-12 10:13:56,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 87 transitions, 254 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 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) [2022-07-12 10:13:56,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:56,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 96 [2022-07-12 10:13:56,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:57,145 INFO L129 PetriNetUnfolder]: 643/1483 cut-off events. [2022-07-12 10:13:57,145 INFO L130 PetriNetUnfolder]: For 804/804 co-relation queries the response was YES. [2022-07-12 10:13:57,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3529 conditions, 1483 events. 643/1483 cut-off events. For 804/804 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 11891 event pairs, 36 based on Foata normal form. 15/1333 useless extension candidates. Maximal degree in co-relation 3471. Up to 166 conditions per place. [2022-07-12 10:13:57,152 INFO L132 encePairwiseOnDemand]: 85/96 looper letters, 87 selfloop transitions, 36 changer transitions 13/190 dead transitions. [2022-07-12 10:13:57,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 190 transitions, 897 flow [2022-07-12 10:13:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 10:13:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-12 10:13:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1542 transitions. [2022-07-12 10:13:57,155 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7301136363636364 [2022-07-12 10:13:57,155 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1542 transitions. [2022-07-12 10:13:57,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1542 transitions. [2022-07-12 10:13:57,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:57,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1542 transitions. [2022-07-12 10:13:57,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.0909090909091) internal successors, (1542), 22 states have internal predecessors, (1542), 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) [2022-07-12 10:13:57,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 96.0) internal successors, (2208), 23 states have internal predecessors, (2208), 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) [2022-07-12 10:13:57,162 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 96.0) internal successors, (2208), 23 states have internal predecessors, (2208), 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) [2022-07-12 10:13:57,162 INFO L186 Difference]: Start difference. First operand has 100 places, 87 transitions, 254 flow. Second operand 22 states and 1542 transitions. [2022-07-12 10:13:57,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 190 transitions, 897 flow [2022-07-12 10:13:57,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 190 transitions, 891 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 10:13:57,169 INFO L242 Difference]: Finished difference. Result has 127 places, 110 transitions, 516 flow [2022-07-12 10:13:57,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=516, PETRI_PLACES=127, PETRI_TRANSITIONS=110} [2022-07-12 10:13:57,170 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 40 predicate places. [2022-07-12 10:13:57,170 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 110 transitions, 516 flow [2022-07-12 10:13:57,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 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) [2022-07-12 10:13:57,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:57,171 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:57,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:13:57,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:13:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1541547493, now seen corresponding path program 1 times [2022-07-12 10:13:57,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:57,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654661747] [2022-07-12 10:13:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:57,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:13:57,192 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:13:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:13:57,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:13:57,226 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:13:57,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:13:57,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:13:57,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-12 10:13:57,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:13:57,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:13:57,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:13:57,227 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:13:57,228 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:13:57,228 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:13:57,247 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:13:57,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 124 places, 115 transitions, 272 flow [2022-07-12 10:13:57,263 INFO L129 PetriNetUnfolder]: 6/140 cut-off events. [2022-07-12 10:13:57,263 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:13:57,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 140 events. 6/140 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2022-07-12 10:13:57,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 115 transitions, 272 flow [2022-07-12 10:13:57,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 88 transitions, 200 flow [2022-07-12 10:13:57,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:13:57,270 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@4a27734a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@765c77e [2022-07-12 10:13:57,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:13:57,274 INFO L129 PetriNetUnfolder]: 3/57 cut-off events. [2022-07-12 10:13:57,274 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:13:57,274 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:57,274 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] [2022-07-12 10:13:57,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:13:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:57,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1038200074, now seen corresponding path program 1 times [2022-07-12 10:13:57,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:57,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107380144] [2022-07-12 10:13:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:57,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:57,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107380144] [2022-07-12 10:13:57,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107380144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:57,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:57,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:13:57,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026723632] [2022-07-12 10:13:57,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:57,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:13:57,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:13:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:13:57,384 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 115 [2022-07-12 10:13:57,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 78.625) internal successors, (629), 8 states have internal predecessors, (629), 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) [2022-07-12 10:13:57,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:57,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 115 [2022-07-12 10:13:57,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:57,780 INFO L129 PetriNetUnfolder]: 2081/3929 cut-off events. [2022-07-12 10:13:57,780 INFO L130 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2022-07-12 10:13:57,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7355 conditions, 3929 events. 2081/3929 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31212 event pairs, 169 based on Foata normal form. 76/3586 useless extension candidates. Maximal degree in co-relation 7303. Up to 1142 conditions per place. [2022-07-12 10:13:57,800 INFO L132 encePairwiseOnDemand]: 101/115 looper letters, 72 selfloop transitions, 17 changer transitions 6/153 dead transitions. [2022-07-12 10:13:57,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 153 transitions, 598 flow [2022-07-12 10:13:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:13:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:13:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 953 transitions. [2022-07-12 10:13:57,803 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7533596837944664 [2022-07-12 10:13:57,803 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 953 transitions. [2022-07-12 10:13:57,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 953 transitions. [2022-07-12 10:13:57,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:57,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 953 transitions. [2022-07-12 10:13:57,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 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) [2022-07-12 10:13:57,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 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) [2022-07-12 10:13:57,807 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 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) [2022-07-12 10:13:57,807 INFO L186 Difference]: Start difference. First operand has 95 places, 88 transitions, 200 flow. Second operand 11 states and 953 transitions. [2022-07-12 10:13:57,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 153 transitions, 598 flow [2022-07-12 10:13:57,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 579 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:57,811 INFO L242 Difference]: Finished difference. Result has 108 places, 96 transitions, 294 flow [2022-07-12 10:13:57,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=294, PETRI_PLACES=108, PETRI_TRANSITIONS=96} [2022-07-12 10:13:57,813 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 13 predicate places. [2022-07-12 10:13:57,813 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 96 transitions, 294 flow [2022-07-12 10:13:57,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 78.625) internal successors, (629), 8 states have internal predecessors, (629), 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) [2022-07-12 10:13:57,813 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:57,814 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] [2022-07-12 10:13:57,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:13:57,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:13:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash -777511255, now seen corresponding path program 1 times [2022-07-12 10:13:57,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:57,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482889138] [2022-07-12 10:13:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:57,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:57,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:57,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482889138] [2022-07-12 10:13:57,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482889138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:57,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:57,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 10:13:57,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973860916] [2022-07-12 10:13:57,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:57,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:13:57,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:13:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:13:57,999 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 115 [2022-07-12 10:13:58,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 96 transitions, 294 flow. Second operand has 13 states, 13 states have (on average 72.61538461538461) internal successors, (944), 13 states have internal predecessors, (944), 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) [2022-07-12 10:13:58,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:58,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 115 [2022-07-12 10:13:58,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:14:00,035 INFO L129 PetriNetUnfolder]: 9650/19953 cut-off events. [2022-07-12 10:14:00,036 INFO L130 PetriNetUnfolder]: For 13089/13089 co-relation queries the response was YES. [2022-07-12 10:14:00,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47112 conditions, 19953 events. 9650/19953 cut-off events. For 13089/13089 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 191604 event pairs, 1386 based on Foata normal form. 95/19103 useless extension candidates. Maximal degree in co-relation 47051. Up to 3081 conditions per place. [2022-07-12 10:14:00,221 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 234 selfloop transitions, 100 changer transitions 17/403 dead transitions. [2022-07-12 10:14:00,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 403 transitions, 2175 flow [2022-07-12 10:14:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:14:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:14:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2887 transitions. [2022-07-12 10:14:00,229 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6973429951690822 [2022-07-12 10:14:00,229 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2887 transitions. [2022-07-12 10:14:00,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2887 transitions. [2022-07-12 10:14:00,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:14:00,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2887 transitions. [2022-07-12 10:14:00,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 80.19444444444444) internal successors, (2887), 36 states have internal predecessors, (2887), 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) [2022-07-12 10:14:00,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 115.0) internal successors, (4255), 37 states have internal predecessors, (4255), 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) [2022-07-12 10:14:00,240 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 115.0) internal successors, (4255), 37 states have internal predecessors, (4255), 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) [2022-07-12 10:14:00,241 INFO L186 Difference]: Start difference. First operand has 108 places, 96 transitions, 294 flow. Second operand 36 states and 2887 transitions. [2022-07-12 10:14:00,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 403 transitions, 2175 flow [2022-07-12 10:14:00,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 403 transitions, 2169 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 10:14:00,331 INFO L242 Difference]: Finished difference. Result has 160 places, 191 transitions, 1164 flow [2022-07-12 10:14:00,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1164, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2022-07-12 10:14:00,332 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 65 predicate places. [2022-07-12 10:14:00,332 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 1164 flow [2022-07-12 10:14:00,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.61538461538461) internal successors, (944), 13 states have internal predecessors, (944), 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) [2022-07-12 10:14:00,332 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:14:00,333 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] [2022-07-12 10:14:00,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:14:00,333 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:14:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:14:00,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1930678775, now seen corresponding path program 1 times [2022-07-12 10:14:00,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:14:00,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222986106] [2022-07-12 10:14:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:14:00,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:14:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:14:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:00,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:14:00,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222986106] [2022-07-12 10:14:00,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222986106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:14:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164571906] [2022-07-12 10:14:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:14:00,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:14:00,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:14:00,456 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) [2022-07-12 10:14:00,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:14:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:14:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:14:00,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:14:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:00,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:14:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:00,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164571906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:14:00,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:14:00,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-07-12 10:14:00,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809415200] [2022-07-12 10:14:00,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:14:00,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 10:14:00,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:14:00,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 10:14:00,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-07-12 10:14:00,885 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 115 [2022-07-12 10:14:00,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 1164 flow. Second operand has 25 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 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) [2022-07-12 10:14:00,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:14:00,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 115 [2022-07-12 10:14:00,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:14:06,060 INFO L129 PetriNetUnfolder]: 19384/40113 cut-off events. [2022-07-12 10:14:06,061 INFO L130 PetriNetUnfolder]: For 192916/192918 co-relation queries the response was YES. [2022-07-12 10:14:06,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145112 conditions, 40113 events. 19384/40113 cut-off events. For 192916/192918 co-relation queries the response was YES. Maximal size of possible extension queue 2457. Compared 430209 event pairs, 3872 based on Foata normal form. 298/40346 useless extension candidates. Maximal degree in co-relation 145029. Up to 6733 conditions per place. [2022-07-12 10:14:06,628 INFO L132 encePairwiseOnDemand]: 100/115 looper letters, 475 selfloop transitions, 433 changer transitions 34/996 dead transitions. [2022-07-12 10:14:06,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 996 transitions, 9113 flow [2022-07-12 10:14:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-12 10:14:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-12 10:14:06,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6051 transitions. [2022-07-12 10:14:06,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7207861822513401 [2022-07-12 10:14:06,641 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6051 transitions. [2022-07-12 10:14:06,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6051 transitions. [2022-07-12 10:14:06,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:14:06,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6051 transitions. [2022-07-12 10:14:06,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 82.89041095890411) internal successors, (6051), 73 states have internal predecessors, (6051), 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) [2022-07-12 10:14:06,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 115.0) internal successors, (8510), 74 states have internal predecessors, (8510), 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) [2022-07-12 10:14:06,668 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 115.0) internal successors, (8510), 74 states have internal predecessors, (8510), 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) [2022-07-12 10:14:06,669 INFO L186 Difference]: Start difference. First operand has 160 places, 191 transitions, 1164 flow. Second operand 73 states and 6051 transitions. [2022-07-12 10:14:06,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 996 transitions, 9113 flow [2022-07-12 10:14:08,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 996 transitions, 8841 flow, removed 132 selfloop flow, removed 3 redundant places. [2022-07-12 10:14:08,282 INFO L242 Difference]: Finished difference. Result has 257 places, 607 transitions, 6378 flow [2022-07-12 10:14:08,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=6378, PETRI_PLACES=257, PETRI_TRANSITIONS=607} [2022-07-12 10:14:08,283 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 162 predicate places. [2022-07-12 10:14:08,283 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 607 transitions, 6378 flow [2022-07-12 10:14:08,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 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) [2022-07-12 10:14:08,284 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:14:08,284 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] [2022-07-12 10:14:08,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:14:08,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:14:08,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:14:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:14:08,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1845481669, now seen corresponding path program 1 times [2022-07-12 10:14:08,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:14:08,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246897731] [2022-07-12 10:14:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:14:08,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:14:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:14:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:08,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:14:08,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246897731] [2022-07-12 10:14:08,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246897731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:14:08,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964634605] [2022-07-12 10:14:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:14:08,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:14:08,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:14:08,628 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) [2022-07-12 10:14:08,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:14:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:14:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 10:14:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:14:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:09,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:14:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:09,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964634605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:14:09,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:14:09,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-07-12 10:14:09,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928280870] [2022-07-12 10:14:09,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:14:09,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 10:14:09,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:14:09,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 10:14:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:14:09,228 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2022-07-12 10:14:09,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 607 transitions, 6378 flow. Second operand has 30 states, 30 states have (on average 77.06666666666666) internal successors, (2312), 30 states have internal predecessors, (2312), 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) [2022-07-12 10:14:09,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:14:09,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2022-07-12 10:14:09,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:14:17,261 INFO L129 PetriNetUnfolder]: 19587/40364 cut-off events. [2022-07-12 10:14:17,261 INFO L130 PetriNetUnfolder]: For 498979/501380 co-relation queries the response was YES. [2022-07-12 10:14:17,955 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202110 conditions, 40364 events. 19587/40364 cut-off events. For 498979/501380 co-relation queries the response was YES. Maximal size of possible extension queue 2560. Compared 441461 event pairs, 2082 based on Foata normal form. 452/39592 useless extension candidates. Maximal degree in co-relation 202000. Up to 6579 conditions per place. [2022-07-12 10:14:18,127 INFO L132 encePairwiseOnDemand]: 102/115 looper letters, 421 selfloop transitions, 666 changer transitions 56/1282 dead transitions. [2022-07-12 10:14:18,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 1282 transitions, 17106 flow [2022-07-12 10:14:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 10:14:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-12 10:14:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4969 transitions. [2022-07-12 10:14:18,135 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7201449275362319 [2022-07-12 10:14:18,135 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4969 transitions. [2022-07-12 10:14:18,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4969 transitions. [2022-07-12 10:14:18,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:14:18,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4969 transitions. [2022-07-12 10:14:18,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 82.81666666666666) internal successors, (4969), 60 states have internal predecessors, (4969), 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) [2022-07-12 10:14:18,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 115.0) internal successors, (7015), 61 states have internal predecessors, (7015), 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) [2022-07-12 10:14:18,161 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 115.0) internal successors, (7015), 61 states have internal predecessors, (7015), 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) [2022-07-12 10:14:18,161 INFO L186 Difference]: Start difference. First operand has 257 places, 607 transitions, 6378 flow. Second operand 60 states and 4969 transitions. [2022-07-12 10:14:18,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 1282 transitions, 17106 flow [2022-07-12 10:14:31,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1282 transitions, 13945 flow, removed 1574 selfloop flow, removed 4 redundant places. [2022-07-12 10:14:31,318 INFO L242 Difference]: Finished difference. Result has 334 places, 912 transitions, 9795 flow [2022-07-12 10:14:31,318 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9795, PETRI_PLACES=334, PETRI_TRANSITIONS=912} [2022-07-12 10:14:31,319 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 239 predicate places. [2022-07-12 10:14:31,319 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 912 transitions, 9795 flow [2022-07-12 10:14:31,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 77.06666666666666) internal successors, (2312), 30 states have internal predecessors, (2312), 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) [2022-07-12 10:14:31,320 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:14:31,320 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:14:31,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 10:14:31,534 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,SelfDestructingSolverStorable8 [2022-07-12 10:14:31,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:14:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:14:31,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1796516230, now seen corresponding path program 1 times [2022-07-12 10:14:31,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:14:31,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781384492] [2022-07-12 10:14:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:14:31,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:14:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:14:31,552 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:14:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:14:31,578 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:14:31,578 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:14:31,578 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-12 10:14:31,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-12 10:14:31,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-12 10:14:31,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-12 10:14:31,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-12 10:14:31,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-12 10:14:31,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:14:31,581 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:14:31,582 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:14:31,582 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:14:31,606 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:14:31,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 146 places, 134 transitions, 332 flow [2022-07-12 10:14:31,617 INFO L129 PetriNetUnfolder]: 7/165 cut-off events. [2022-07-12 10:14:31,617 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:14:31,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 165 events. 7/165 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 218 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 185. Up to 10 conditions per place. [2022-07-12 10:14:31,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 134 transitions, 332 flow [2022-07-12 10:14:31,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 94 transitions, 223 flow [2022-07-12 10:14:31,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:14:31,621 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@4a27734a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@765c77e [2022-07-12 10:14:31,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:14:31,623 INFO L129 PetriNetUnfolder]: 3/55 cut-off events. [2022-07-12 10:14:31,623 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:14:31,624 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:14:31,624 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] [2022-07-12 10:14:31,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:14:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:14:31,624 INFO L85 PathProgramCache]: Analyzing trace with hash 536743157, now seen corresponding path program 1 times [2022-07-12 10:14:31,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:14:31,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2725533] [2022-07-12 10:14:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:14:31,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:14:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:14:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:31,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:14:31,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2725533] [2022-07-12 10:14:31,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2725533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:14:31,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:14:31,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:14:31,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375385424] [2022-07-12 10:14:31,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:14:31,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:14:31,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:14:31,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:14:31,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:14:31,722 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 134 [2022-07-12 10:14:31,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 94 transitions, 223 flow. Second operand has 8 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 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) [2022-07-12 10:14:31,723 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:14:31,723 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 134 [2022-07-12 10:14:31,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:14:32,572 INFO L129 PetriNetUnfolder]: 8853/14855 cut-off events. [2022-07-12 10:14:32,572 INFO L130 PetriNetUnfolder]: For 2792/2792 co-relation queries the response was YES. [2022-07-12 10:14:32,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28395 conditions, 14855 events. 8853/14855 cut-off events. For 2792/2792 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 126078 event pairs, 921 based on Foata normal form. 271/13780 useless extension candidates. Maximal degree in co-relation 28342. Up to 5043 conditions per place. [2022-07-12 10:14:32,653 INFO L132 encePairwiseOnDemand]: 119/134 looper letters, 90 selfloop transitions, 20 changer transitions 6/177 dead transitions. [2022-07-12 10:14:32,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 177 transitions, 753 flow [2022-07-12 10:14:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:14:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:14:32,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1106 transitions. [2022-07-12 10:14:32,655 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7503392130257802 [2022-07-12 10:14:32,655 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1106 transitions. [2022-07-12 10:14:32,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1106 transitions. [2022-07-12 10:14:32,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:14:32,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1106 transitions. [2022-07-12 10:14:32,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 100.54545454545455) internal successors, (1106), 11 states have internal predecessors, (1106), 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) [2022-07-12 10:14:32,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 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) [2022-07-12 10:14:32,658 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 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) [2022-07-12 10:14:32,658 INFO L186 Difference]: Start difference. First operand has 103 places, 94 transitions, 223 flow. Second operand 11 states and 1106 transitions. [2022-07-12 10:14:32,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 177 transitions, 753 flow [2022-07-12 10:14:32,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 177 transitions, 704 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-07-12 10:14:32,660 INFO L242 Difference]: Finished difference. Result has 116 places, 105 transitions, 334 flow [2022-07-12 10:14:32,661 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=334, PETRI_PLACES=116, PETRI_TRANSITIONS=105} [2022-07-12 10:14:32,661 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 13 predicate places. [2022-07-12 10:14:32,661 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 105 transitions, 334 flow [2022-07-12 10:14:32,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 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) [2022-07-12 10:14:32,662 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:14:32,662 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] [2022-07-12 10:14:32,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:14:32,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:14:32,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:14:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash 592297315, now seen corresponding path program 1 times [2022-07-12 10:14:32,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:14:32,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824248126] [2022-07-12 10:14:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:14:32,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:14:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:14:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:32,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:14:32,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824248126] [2022-07-12 10:14:32,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824248126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:14:32,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:14:32,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 10:14:32,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877751121] [2022-07-12 10:14:32,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:14:32,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:14:32,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:14:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:14:32,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:14:32,778 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 134 [2022-07-12 10:14:32,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 105 transitions, 334 flow. Second operand has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 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) [2022-07-12 10:14:32,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:14:32,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 134 [2022-07-12 10:14:32,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:14:38,372 INFO L129 PetriNetUnfolder]: 44231/77184 cut-off events. [2022-07-12 10:14:38,372 INFO L130 PetriNetUnfolder]: For 59453/59453 co-relation queries the response was YES. [2022-07-12 10:14:38,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199386 conditions, 77184 events. 44231/77184 cut-off events. For 59453/59453 co-relation queries the response was YES. Maximal size of possible extension queue 3823. Compared 750244 event pairs, 6756 based on Foata normal form. 325/74157 useless extension candidates. Maximal degree in co-relation 199324. Up to 15811 conditions per place. [2022-07-12 10:14:39,052 INFO L132 encePairwiseOnDemand]: 116/134 looper letters, 282 selfloop transitions, 116 changer transitions 17/470 dead transitions. [2022-07-12 10:14:39,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 470 transitions, 2653 flow [2022-07-12 10:14:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:14:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:14:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3379 transitions. [2022-07-12 10:14:39,055 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7004560530679934 [2022-07-12 10:14:39,056 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3379 transitions. [2022-07-12 10:14:39,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3379 transitions. [2022-07-12 10:14:39,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:14:39,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3379 transitions. [2022-07-12 10:14:39,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 93.86111111111111) internal successors, (3379), 36 states have internal predecessors, (3379), 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) [2022-07-12 10:14:39,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 134.0) internal successors, (4958), 37 states have internal predecessors, (4958), 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) [2022-07-12 10:14:39,063 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 134.0) internal successors, (4958), 37 states have internal predecessors, (4958), 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) [2022-07-12 10:14:39,064 INFO L186 Difference]: Start difference. First operand has 116 places, 105 transitions, 334 flow. Second operand 36 states and 3379 transitions. [2022-07-12 10:14:39,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 470 transitions, 2653 flow [2022-07-12 10:14:39,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 470 transitions, 2647 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 10:14:39,541 INFO L242 Difference]: Finished difference. Result has 168 places, 213 transitions, 1344 flow [2022-07-12 10:14:39,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1344, PETRI_PLACES=168, PETRI_TRANSITIONS=213} [2022-07-12 10:14:39,542 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 65 predicate places. [2022-07-12 10:14:39,542 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 213 transitions, 1344 flow [2022-07-12 10:14:39,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 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) [2022-07-12 10:14:39,542 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:14:39,543 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] [2022-07-12 10:14:39,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:14:39,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:14:39,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:14:39,543 INFO L85 PathProgramCache]: Analyzing trace with hash 800739264, now seen corresponding path program 1 times [2022-07-12 10:14:39,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:14:39,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387875950] [2022-07-12 10:14:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:14:39,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:14:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:14:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:39,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:14:39,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387875950] [2022-07-12 10:14:39,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387875950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:14:39,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776692327] [2022-07-12 10:14:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:14:39,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:14:39,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:14:39,610 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) [2022-07-12 10:14:39,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:14:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:14:39,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:14:39,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:14:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:39,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:14:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:14:39,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776692327] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:14:39,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:14:39,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-07-12 10:14:39,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531048603] [2022-07-12 10:14:39,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:14:39,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 10:14:39,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:14:39,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 10:14:39,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-07-12 10:14:39,932 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 134 [2022-07-12 10:14:39,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 213 transitions, 1344 flow. Second operand has 25 states, 25 states have (on average 88.16) internal successors, (2204), 25 states have internal predecessors, (2204), 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) [2022-07-12 10:14:39,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:14:39,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 134 [2022-07-12 10:14:39,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand